./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7 --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 2a3326bc22943076798f4c55311213b2a5f9b1e03e68dc17c2ac5a3393252251 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:49:32,208 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:49:32,211 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:49:32,264 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:49:32,264 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:49:32,269 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:49:32,271 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:49:32,275 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:49:32,278 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:49:32,284 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:49:32,286 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:49:32,287 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:49:32,288 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:49:32,290 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:49:32,292 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:49:32,297 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:49:32,298 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:49:32,299 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:49:32,302 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:49:32,312 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:49:32,314 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:49:32,316 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:49:32,319 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:49:32,320 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:49:32,329 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:49:32,330 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:49:32,330 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:49:32,332 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:49:32,333 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:49:32,335 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:49:32,335 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:49:32,336 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:49:32,338 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:49:32,340 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:49:32,341 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:49:32,342 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:49:32,343 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:49:32,343 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:49:32,343 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:49:32,344 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:49:32,345 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:49:32,346 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-25 19:49:32,391 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:49:32,391 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:49:32,391 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:49:32,391 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:49:32,392 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:49:32,392 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:49:32,393 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:49:32,393 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:49:32,393 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:49:32,393 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:49:32,393 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:49:32,394 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:49:32,394 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:49:32,394 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:49:32,394 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:49:32,394 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:49:32,395 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:49:32,395 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:49:32,396 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 19:49:32,396 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 19:49:32,396 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:49:32,396 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:49:32,396 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 19:49:32,397 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:49:32,397 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:49:32,397 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:49:32,397 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 19:49:32,398 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 19:49:32,398 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-25 19:49:32,398 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:49:32,398 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 19:49:32,398 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:49:32,399 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:49:32,399 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:49:32,399 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:49:32,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:49:32,400 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:49:32,400 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:49:32,400 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:49:32,400 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:49:32,400 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:49:32,401 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:49:32,401 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_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a3326bc22943076798f4c55311213b2a5f9b1e03e68dc17c2ac5a3393252251 [2021-11-25 19:49:32,655 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:49:32,686 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:49:32,689 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:49:32,690 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:49:32,691 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:49:32,693 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-2.i [2021-11-25 19:49:32,773 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/data/06468f1d9/97d00563cda5487c981195d09c6d989d/FLAG2f3244f97 [2021-11-25 19:49:33,437 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:49:33,438 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-2.i [2021-11-25 19:49:33,470 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/data/06468f1d9/97d00563cda5487c981195d09c6d989d/FLAG2f3244f97 [2021-11-25 19:49:33,723 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/data/06468f1d9/97d00563cda5487c981195d09c6d989d [2021-11-25 19:49:33,726 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:49:33,727 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:49:33,729 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:49:33,730 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:49:33,732 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:49:33,733 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:49:33" (1/1) ... [2021-11-25 19:49:33,734 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d94bc78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:49:33, skipping insertion in model container [2021-11-25 19:49:33,734 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:49:33" (1/1) ... [2021-11-25 19:49:33,740 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:49:33,797 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:49:34,251 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-2.i[37019,37032] [2021-11-25 19:49:34,403 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-2.i[47352,47365] [2021-11-25 19:49:34,427 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:49:34,450 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) [2021-11-25 19:49:34,451 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6ad5a452 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:49:34, skipping insertion in model container [2021-11-25 19:49:34,451 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:49:34,452 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-25 19:49:34,454 INFO L158 Benchmark]: Toolchain (without parser) took 725.35ms. Allocated memory was 83.9MB in the beginning and 113.2MB in the end (delta: 29.4MB). Free memory was 48.5MB in the beginning and 77.0MB in the end (delta: -28.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-25 19:49:34,456 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 83.9MB. Free memory was 53.1MB in the beginning and 53.0MB in the end (delta: 24.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 19:49:34,458 INFO L158 Benchmark]: CACSL2BoogieTranslator took 722.30ms. Allocated memory was 83.9MB in the beginning and 113.2MB in the end (delta: 29.4MB). Free memory was 48.2MB in the beginning and 77.0MB in the end (delta: -28.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-25 19:49:34,460 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 83.9MB. Free memory was 53.1MB in the beginning and 53.0MB in the end (delta: 24.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 722.30ms. Allocated memory was 83.9MB in the beginning and 113.2MB in the end (delta: 29.4MB). Free memory was 48.2MB in the beginning and 77.0MB in the end (delta: -28.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 815]: 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_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7 --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 2a3326bc22943076798f4c55311213b2a5f9b1e03e68dc17c2ac5a3393252251 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:49:36,627 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:49:36,629 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:49:36,660 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:49:36,661 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:49:36,663 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:49:36,665 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:49:36,667 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:49:36,669 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:49:36,671 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:49:36,672 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:49:36,673 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:49:36,674 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:49:36,675 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:49:36,677 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:49:36,679 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:49:36,680 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:49:36,681 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:49:36,683 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:49:36,685 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:49:36,687 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:49:36,689 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:49:36,690 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:49:36,692 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:49:36,696 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:49:36,696 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:49:36,697 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:49:36,698 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:49:36,699 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:49:36,700 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:49:36,700 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:49:36,701 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:49:36,702 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:49:36,703 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:49:36,705 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:49:36,705 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:49:36,706 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:49:36,706 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:49:36,707 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:49:36,708 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:49:36,709 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:49:36,710 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-25 19:49:36,736 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:49:36,736 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:49:36,737 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:49:36,737 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:49:36,738 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:49:36,738 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:49:36,738 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:49:36,739 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:49:36,739 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:49:36,739 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:49:36,740 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:49:36,740 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:49:36,741 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 19:49:36,741 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 19:49:36,741 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:49:36,742 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:49:36,742 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 19:49:36,742 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:49:36,742 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:49:36,743 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:49:36,743 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 19:49:36,743 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 19:49:36,743 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-25 19:49:36,743 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:49:36,744 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 19:49:36,744 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-25 19:49:36,744 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-25 19:49:36,744 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:49:36,745 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:49:36,745 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:49:36,745 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-25 19:49:36,745 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:49:36,745 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:49:36,746 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:49:36,746 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:49:36,746 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-25 19:49:36,746 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-25 19:49:36,747 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:49:36,747 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:49:36,747 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_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a3326bc22943076798f4c55311213b2a5f9b1e03e68dc17c2ac5a3393252251 [2021-11-25 19:49:37,106 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:49:37,132 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:49:37,136 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:49:37,137 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:49:37,138 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:49:37,139 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-2.i [2021-11-25 19:49:37,221 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/data/65897df14/4fb26e53065f4eca9d4684c57c583f03/FLAGcca7aff3f [2021-11-25 19:49:38,001 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:49:38,002 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-2.i [2021-11-25 19:49:38,026 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/data/65897df14/4fb26e53065f4eca9d4684c57c583f03/FLAGcca7aff3f [2021-11-25 19:49:38,166 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/data/65897df14/4fb26e53065f4eca9d4684c57c583f03 [2021-11-25 19:49:38,170 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:49:38,173 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:49:38,175 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:49:38,175 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:49:38,179 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:49:38,180 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:49:38" (1/1) ... [2021-11-25 19:49:38,182 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a7797ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:49:38, skipping insertion in model container [2021-11-25 19:49:38,182 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:49:38" (1/1) ... [2021-11-25 19:49:38,189 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:49:38,258 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:49:38,779 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-2.i[37019,37032] [2021-11-25 19:49:38,936 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-2.i[47352,47365] [2021-11-25 19:49:38,952 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:49:38,965 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-25 19:49:38,985 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:49:39,029 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-2.i[37019,37032] [2021-11-25 19:49:39,118 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-2.i[47352,47365] [2021-11-25 19:49:39,127 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:49:39,139 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:49:39,183 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-2.i[37019,37032] [2021-11-25 19:49:39,263 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-2.i[47352,47365] [2021-11-25 19:49:39,272 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:49:39,331 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:49:39,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:49:39 WrapperNode [2021-11-25 19:49:39,332 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:49:39,333 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:49:39,333 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:49:39,333 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:49:39,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:49:39" (1/1) ... [2021-11-25 19:49:39,373 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:49:39" (1/1) ... [2021-11-25 19:49:39,438 INFO L137 Inliner]: procedures = 211, calls = 286, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1054 [2021-11-25 19:49:39,438 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:49:39,439 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:49:39,439 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:49:39,439 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:49:39,452 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:49:39" (1/1) ... [2021-11-25 19:49:39,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:49:39" (1/1) ... [2021-11-25 19:49:39,472 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:49:39" (1/1) ... [2021-11-25 19:49:39,472 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:49:39" (1/1) ... [2021-11-25 19:49:39,539 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:49:39" (1/1) ... [2021-11-25 19:49:39,551 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:49:39" (1/1) ... [2021-11-25 19:49:39,582 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:49:39" (1/1) ... [2021-11-25 19:49:39,596 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:49:39,605 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:49:39,605 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:49:39,605 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:49:39,606 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:49:39" (1/1) ... [2021-11-25 19:49:39,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:49:39,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:49:39,657 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:49:39,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:49:39,706 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-25 19:49:39,707 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-25 19:49:39,707 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-25 19:49:39,707 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-25 19:49:39,707 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 19:49:39,707 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-25 19:49:39,707 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 19:49:39,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 19:49:39,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-25 19:49:39,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-25 19:49:39,708 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-25 19:49:39,708 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-25 19:49:39,708 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 19:49:39,709 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:49:39,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 19:49:39,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:49:39,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:49:40,015 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:49:40,016 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:49:40,020 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-25 19:49:44,809 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:49:44,822 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:49:44,823 INFO L301 CfgBuilder]: Removed 63 assume(true) statements. [2021-11-25 19:49:44,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:49:44 BoogieIcfgContainer [2021-11-25 19:49:44,826 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:49:44,828 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:49:44,828 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:49:44,831 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:49:44,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:49:38" (1/3) ... [2021-11-25 19:49:44,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74f21b00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:49:44, skipping insertion in model container [2021-11-25 19:49:44,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:49:39" (2/3) ... [2021-11-25 19:49:44,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74f21b00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:49:44, skipping insertion in model container [2021-11-25 19:49:44,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:49:44" (3/3) ... [2021-11-25 19:49:44,834 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SFH_test2-2.i [2021-11-25 19:49:44,839 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:49:44,839 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 536 error locations. [2021-11-25 19:49:44,884 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:49:44,891 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 [2021-11-25 19:49:44,892 INFO L340 AbstractCegarLoop]: Starting to check reachability of 536 error locations. [2021-11-25 19:49:44,926 INFO L276 IsEmpty]: Start isEmpty. Operand has 1081 states, 537 states have (on average 2.2364990689013036) internal successors, (1201), 1075 states have internal predecessors, (1201), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 19:49:44,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-25 19:49:44,932 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:49:44,932 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-25 19:49:44,933 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-11-25 19:49:44,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:49:44,938 INFO L85 PathProgramCache]: Analyzing trace with hash 38794, now seen corresponding path program 1 times [2021-11-25 19:49:44,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:49:44,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1902474382] [2021-11-25 19:49:44,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:49:44,950 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:49:44,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:49:44,953 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:49:44,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-25 19:49:45,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:49:45,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:49:45,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:49:45,243 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 [2021-11-25 19:49:45,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:49:45,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:49:45,254 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:49:45,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1902474382] [2021-11-25 19:49:45,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1902474382] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:49:45,256 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:49:45,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:49:45,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323066988] [2021-11-25 19:49:45,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:49:45,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:49:45,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:49:45,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:49:45,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:49:45,302 INFO L87 Difference]: Start difference. First operand has 1081 states, 537 states have (on average 2.2364990689013036) internal successors, (1201), 1075 states have internal predecessors, (1201), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:49:47,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:49:47,489 INFO L93 Difference]: Finished difference Result 1245 states and 1321 transitions. [2021-11-25 19:49:47,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:49:47,497 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-25 19:49:47,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:49:47,522 INFO L225 Difference]: With dead ends: 1245 [2021-11-25 19:49:47,523 INFO L226 Difference]: Without dead ends: 1243 [2021-11-25 19:49:47,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:49:47,528 INFO L933 BasicCegarLoop]: 656 mSDtfsCounter, 995 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1003 SdHoareTripleChecker+Valid, 805 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:49:47,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1003 Valid, 805 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-25 19:49:47,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1243 states. [2021-11-25 19:49:47,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1243 to 1065. [2021-11-25 19:49:47,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1065 states, 537 states have (on average 2.080074487895717) internal successors, (1117), 1059 states have internal predecessors, (1117), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 19:49:47,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 1133 transitions. [2021-11-25 19:49:47,662 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 1133 transitions. Word has length 3 [2021-11-25 19:49:47,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:49:47,662 INFO L470 AbstractCegarLoop]: Abstraction has 1065 states and 1133 transitions. [2021-11-25 19:49:47,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:49:47,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 1133 transitions. [2021-11-25 19:49:47,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-25 19:49:47,663 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:49:47,663 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-25 19:49:47,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:49:47,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:49:47,875 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-11-25 19:49:47,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:49:47,876 INFO L85 PathProgramCache]: Analyzing trace with hash 38795, now seen corresponding path program 1 times [2021-11-25 19:49:47,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:49:47,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1901154207] [2021-11-25 19:49:47,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:49:47,877 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:49:47,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:49:47,878 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:49:47,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-25 19:49:48,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:49:48,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:49:48,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:49:48,046 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 [2021-11-25 19:49:48,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:49:48,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:49:48,087 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:49:48,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1901154207] [2021-11-25 19:49:48,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1901154207] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:49:48,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:49:48,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:49:48,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490375798] [2021-11-25 19:49:48,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:49:48,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:49:48,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:49:48,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:49:48,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:49:48,090 INFO L87 Difference]: Start difference. First operand 1065 states and 1133 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:49:51,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:49:51,193 INFO L93 Difference]: Finished difference Result 1483 states and 1593 transitions. [2021-11-25 19:49:51,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:49:51,193 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-25 19:49:51,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:49:51,202 INFO L225 Difference]: With dead ends: 1483 [2021-11-25 19:49:51,203 INFO L226 Difference]: Without dead ends: 1483 [2021-11-25 19:49:51,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:49:51,205 INFO L933 BasicCegarLoop]: 942 mSDtfsCounter, 450 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 1540 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:49:51,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [455 Valid, 1540 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-25 19:49:51,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1483 states. [2021-11-25 19:49:51,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1483 to 1197. [2021-11-25 19:49:51,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 665 states have (on average 2.037593984962406) internal successors, (1355), 1191 states have internal predecessors, (1355), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 5 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-25 19:49:51,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 1381 transitions. [2021-11-25 19:49:51,266 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 1381 transitions. Word has length 3 [2021-11-25 19:49:51,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:49:51,267 INFO L470 AbstractCegarLoop]: Abstraction has 1197 states and 1381 transitions. [2021-11-25 19:49:51,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:49:51,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 1381 transitions. [2021-11-25 19:49:51,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 19:49:51,268 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:49:51,268 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:49:51,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:49:51,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:49:51,479 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-11-25 19:49:51,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:49:51,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1466973012, now seen corresponding path program 1 times [2021-11-25 19:49:51,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:49:51,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1537436905] [2021-11-25 19:49:51,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:49:51,481 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:49:51,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:49:51,482 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:49:51,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-25 19:49:51,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:49:51,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:49:51,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:49:51,693 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 [2021-11-25 19:49:51,700 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 [2021-11-25 19:49:51,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:51,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 19:49:51,817 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 19:49:51,817 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 18 treesize of output 18 [2021-11-25 19:49:51,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:49:51,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:49:51,847 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:49:51,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1537436905] [2021-11-25 19:49:51,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1537436905] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:49:51,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:49:51,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:49:51,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298594330] [2021-11-25 19:49:51,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:49:51,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:49:51,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:49:51,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:49:51,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:49:51,854 INFO L87 Difference]: Start difference. First operand 1197 states and 1381 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:49:54,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:49:54,949 INFO L93 Difference]: Finished difference Result 1364 states and 1556 transitions. [2021-11-25 19:49:54,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:49:54,950 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-11-25 19:49:54,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:49:54,958 INFO L225 Difference]: With dead ends: 1364 [2021-11-25 19:49:54,959 INFO L226 Difference]: Without dead ends: 1364 [2021-11-25 19:49:54,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:49:54,960 INFO L933 BasicCegarLoop]: 383 mSDtfsCounter, 1267 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1275 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:49:54,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1275 Valid, 473 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 977 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-25 19:49:54,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1364 states. [2021-11-25 19:49:54,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1364 to 1054. [2021-11-25 19:49:54,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1054 states, 537 states have (on average 2.0577281191806334) internal successors, (1105), 1048 states have internal predecessors, (1105), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 19:49:54,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 1121 transitions. [2021-11-25 19:49:54,994 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 1121 transitions. Word has length 7 [2021-11-25 19:49:54,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:49:54,995 INFO L470 AbstractCegarLoop]: Abstraction has 1054 states and 1121 transitions. [2021-11-25 19:49:54,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:49:54,995 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 1121 transitions. [2021-11-25 19:49:54,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 19:49:54,995 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:49:54,996 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:49:55,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:49:55,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:49:55,207 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-11-25 19:49:55,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:49:55,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1768476910, now seen corresponding path program 1 times [2021-11-25 19:49:55,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:49:55,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1368002138] [2021-11-25 19:49:55,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:49:55,209 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:49:55,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:49:55,214 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:49:55,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-25 19:49:55,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:49:55,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:49:55,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:49:55,366 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 [2021-11-25 19:49:55,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:49:55,382 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:49:55,382 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:49:55,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1368002138] [2021-11-25 19:49:55,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1368002138] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:49:55,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:49:55,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:49:55,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414414671] [2021-11-25 19:49:55,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:49:55,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:49:55,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:49:55,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:49:55,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:49:55,387 INFO L87 Difference]: Start difference. First operand 1054 states and 1121 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:49:57,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:49:57,325 INFO L93 Difference]: Finished difference Result 1230 states and 1328 transitions. [2021-11-25 19:49:57,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:49:57,327 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-25 19:49:57,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:49:57,334 INFO L225 Difference]: With dead ends: 1230 [2021-11-25 19:49:57,334 INFO L226 Difference]: Without dead ends: 1230 [2021-11-25 19:49:57,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:49:57,335 INFO L933 BasicCegarLoop]: 906 mSDtfsCounter, 814 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 822 SdHoareTripleChecker+Valid, 1183 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-25 19:49:57,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [822 Valid, 1183 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-25 19:49:57,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2021-11-25 19:49:57,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1007. [2021-11-25 19:49:57,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1007 states, 537 states have (on average 1.9702048417132216) internal successors, (1058), 1001 states have internal predecessors, (1058), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 19:49:57,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1007 states to 1007 states and 1074 transitions. [2021-11-25 19:49:57,365 INFO L78 Accepts]: Start accepts. Automaton has 1007 states and 1074 transitions. Word has length 8 [2021-11-25 19:49:57,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:49:57,365 INFO L470 AbstractCegarLoop]: Abstraction has 1007 states and 1074 transitions. [2021-11-25 19:49:57,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:49:57,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1007 states and 1074 transitions. [2021-11-25 19:49:57,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 19:49:57,366 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:49:57,366 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:49:57,382 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-25 19:49:57,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:49:57,582 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-11-25 19:49:57,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:49:57,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1768476909, now seen corresponding path program 1 times [2021-11-25 19:49:57,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:49:57,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1101684413] [2021-11-25 19:49:57,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:49:57,583 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:49:57,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:49:57,584 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:49:57,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-25 19:49:57,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:49:57,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:49:57,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:49:57,734 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 [2021-11-25 19:49:57,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:49:57,766 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:49:57,766 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:49:57,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1101684413] [2021-11-25 19:49:57,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1101684413] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:49:57,767 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:49:57,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:49:57,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435414402] [2021-11-25 19:49:57,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:49:57,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:49:57,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:49:57,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:49:57,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:49:57,769 INFO L87 Difference]: Start difference. First operand 1007 states and 1074 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:50:00,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:00,178 INFO L93 Difference]: Finished difference Result 1295 states and 1396 transitions. [2021-11-25 19:50:00,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:50:00,179 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-25 19:50:00,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:00,186 INFO L225 Difference]: With dead ends: 1295 [2021-11-25 19:50:00,186 INFO L226 Difference]: Without dead ends: 1295 [2021-11-25 19:50:00,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:50:00,188 INFO L933 BasicCegarLoop]: 1098 mSDtfsCounter, 499 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 1541 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:00,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 1541 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-25 19:50:00,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1295 states. [2021-11-25 19:50:00,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1295 to 1029. [2021-11-25 19:50:00,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 569 states have (on average 1.9578207381370827) internal successors, (1114), 1023 states have internal predecessors, (1114), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 19:50:00,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 1130 transitions. [2021-11-25 19:50:00,219 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 1130 transitions. Word has length 8 [2021-11-25 19:50:00,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:50:00,219 INFO L470 AbstractCegarLoop]: Abstraction has 1029 states and 1130 transitions. [2021-11-25 19:50:00,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:50:00,219 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 1130 transitions. [2021-11-25 19:50:00,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 19:50:00,220 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:00,220 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:50:00,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-25 19:50:00,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:50:00,434 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr429REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-11-25 19:50:00,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:00,434 INFO L85 PathProgramCache]: Analyzing trace with hash 871160987, now seen corresponding path program 1 times [2021-11-25 19:50:00,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:50:00,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [369035052] [2021-11-25 19:50:00,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:00,435 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:50:00,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:50:00,436 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:50:00,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-25 19:50:00,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:00,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:50:00,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:00,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:50:00,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:50:00,641 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:50:00,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [369035052] [2021-11-25 19:50:00,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [369035052] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:50:00,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:50:00,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:50:00,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757902017] [2021-11-25 19:50:00,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:50:00,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:50:00,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:50:00,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:50:00,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:50:00,643 INFO L87 Difference]: Start difference. First operand 1029 states and 1130 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:50:00,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:00,964 INFO L93 Difference]: Finished difference Result 1506 states and 1652 transitions. [2021-11-25 19:50:00,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:50:00,965 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-25 19:50:00,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:00,973 INFO L225 Difference]: With dead ends: 1506 [2021-11-25 19:50:00,973 INFO L226 Difference]: Without dead ends: 1506 [2021-11-25 19:50:00,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:50:00,974 INFO L933 BasicCegarLoop]: 1131 mSDtfsCounter, 570 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 2038 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:00,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [577 Valid, 2038 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 19:50:00,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-11-25 19:50:01,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1213. [2021-11-25 19:50:01,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1213 states, 748 states have (on average 1.8997326203208555) internal successors, (1421), 1207 states have internal predecessors, (1421), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 5 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-25 19:50:01,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 1447 transitions. [2021-11-25 19:50:01,015 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 1447 transitions. Word has length 11 [2021-11-25 19:50:01,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:50:01,015 INFO L470 AbstractCegarLoop]: Abstraction has 1213 states and 1447 transitions. [2021-11-25 19:50:01,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:50:01,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 1447 transitions. [2021-11-25 19:50:01,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 19:50:01,016 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:01,016 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:50:01,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:01,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:50:01,228 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr340REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-11-25 19:50:01,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:01,229 INFO L85 PathProgramCache]: Analyzing trace with hash -702153283, now seen corresponding path program 1 times [2021-11-25 19:50:01,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:50:01,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [386486181] [2021-11-25 19:50:01,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:01,230 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:50:01,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:50:01,231 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:50:01,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-25 19:50:01,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:01,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 19:50:01,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:01,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:50:01,406 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:50:01,407 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:50:01,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [386486181] [2021-11-25 19:50:01,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [386486181] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:50:01,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:50:01,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:50:01,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127608683] [2021-11-25 19:50:01,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:50:01,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:50:01,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:50:01,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:50:01,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:50:01,409 INFO L87 Difference]: Start difference. First operand 1213 states and 1447 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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) [2021-11-25 19:50:01,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:01,444 INFO L93 Difference]: Finished difference Result 1367 states and 1587 transitions. [2021-11-25 19:50:01,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:50:01,445 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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 13 [2021-11-25 19:50:01,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:01,452 INFO L225 Difference]: With dead ends: 1367 [2021-11-25 19:50:01,453 INFO L226 Difference]: Without dead ends: 1367 [2021-11-25 19:50:01,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:50:01,454 INFO L933 BasicCegarLoop]: 1222 mSDtfsCounter, 404 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 2044 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:01,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 2044 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:50:01,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1367 states. [2021-11-25 19:50:01,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1367 to 1153. [2021-11-25 19:50:01,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 712 states have (on average 1.875) internal successors, (1335), 1147 states have internal predecessors, (1335), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 5 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-25 19:50:01,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1361 transitions. [2021-11-25 19:50:01,492 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1361 transitions. Word has length 13 [2021-11-25 19:50:01,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:50:01,492 INFO L470 AbstractCegarLoop]: Abstraction has 1153 states and 1361 transitions. [2021-11-25 19:50:01,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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) [2021-11-25 19:50:01,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1361 transitions. [2021-11-25 19:50:01,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-25 19:50:01,494 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:01,494 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:50:01,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:01,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:50:01,705 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr534ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-11-25 19:50:01,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:01,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1723272146, now seen corresponding path program 1 times [2021-11-25 19:50:01,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:50:01,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [358472859] [2021-11-25 19:50:01,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:01,708 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:50:01,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:50:01,708 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:50:01,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-25 19:50:01,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:01,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:50:01,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:01,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:01,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:01,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:01,971 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-25 19:50:01,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-25 19:50:02,033 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-25 19:50:02,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-11-25 19:50:02,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:50:02,062 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:50:02,062 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:50:02,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [358472859] [2021-11-25 19:50:02,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [358472859] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:50:02,062 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:50:02,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:50:02,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196106447] [2021-11-25 19:50:02,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:50:02,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:50:02,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:50:02,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:50:02,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:50:02,064 INFO L87 Difference]: Start difference. First operand 1153 states and 1361 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:50:03,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:03,427 INFO L93 Difference]: Finished difference Result 1490 states and 1749 transitions. [2021-11-25 19:50:03,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:50:03,428 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2021-11-25 19:50:03,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:03,435 INFO L225 Difference]: With dead ends: 1490 [2021-11-25 19:50:03,435 INFO L226 Difference]: Without dead ends: 1490 [2021-11-25 19:50:03,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:50:03,436 INFO L933 BasicCegarLoop]: 984 mSDtfsCounter, 342 mSDsluCounter, 1851 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 2835 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:03,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 2835 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-25 19:50:03,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2021-11-25 19:50:03,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 1152. [2021-11-25 19:50:03,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 711 states have (on average 1.8748241912798875) internal successors, (1333), 1146 states have internal predecessors, (1333), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 5 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-25 19:50:03,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 1359 transitions. [2021-11-25 19:50:03,467 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 1359 transitions. Word has length 14 [2021-11-25 19:50:03,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:50:03,467 INFO L470 AbstractCegarLoop]: Abstraction has 1152 states and 1359 transitions. [2021-11-25 19:50:03,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:50:03,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 1359 transitions. [2021-11-25 19:50:03,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 19:50:03,468 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:03,468 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:50:03,480 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-25 19:50:03,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:50:03,680 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-11-25 19:50:03,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:03,681 INFO L85 PathProgramCache]: Analyzing trace with hash -344619170, now seen corresponding path program 1 times [2021-11-25 19:50:03,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:50:03,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [707512254] [2021-11-25 19:50:03,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:03,681 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:50:03,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:50:03,682 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:50:03,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-25 19:50:03,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:03,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 19:50:03,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:03,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:50:03,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:50:03,905 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:50:03,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [707512254] [2021-11-25 19:50:03,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [707512254] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:50:03,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:50:03,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:50:03,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966550310] [2021-11-25 19:50:03,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:50:03,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:50:03,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:50:03,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:50:03,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:50:03,908 INFO L87 Difference]: Start difference. First operand 1152 states and 1359 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:50:03,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:03,935 INFO L93 Difference]: Finished difference Result 1092 states and 1273 transitions. [2021-11-25 19:50:03,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:50:03,935 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-25 19:50:03,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:03,941 INFO L225 Difference]: With dead ends: 1092 [2021-11-25 19:50:03,941 INFO L226 Difference]: Without dead ends: 1092 [2021-11-25 19:50:03,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:50:03,943 INFO L933 BasicCegarLoop]: 974 mSDtfsCounter, 943 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 951 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:03,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [951 Valid, 1006 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:50:03,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1092 states. [2021-11-25 19:50:03,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1092 to 1092. [2021-11-25 19:50:03,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1092 states, 675 states have (on average 1.8474074074074074) internal successors, (1247), 1086 states have internal predecessors, (1247), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 5 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-25 19:50:03,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1092 states to 1092 states and 1273 transitions. [2021-11-25 19:50:03,969 INFO L78 Accepts]: Start accepts. Automaton has 1092 states and 1273 transitions. Word has length 18 [2021-11-25 19:50:03,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:50:03,969 INFO L470 AbstractCegarLoop]: Abstraction has 1092 states and 1273 transitions. [2021-11-25 19:50:03,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:50:03,970 INFO L276 IsEmpty]: Start isEmpty. Operand 1092 states and 1273 transitions. [2021-11-25 19:50:03,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-25 19:50:03,971 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:03,971 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:50:03,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:04,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:50:04,182 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-11-25 19:50:04,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:04,183 INFO L85 PathProgramCache]: Analyzing trace with hash -466544200, now seen corresponding path program 1 times [2021-11-25 19:50:04,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:50:04,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [950053664] [2021-11-25 19:50:04,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:04,183 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:50:04,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:50:04,184 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:50:04,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-25 19:50:04,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:04,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:50:04,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:04,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:50:04,388 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:50:04,388 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:50:04,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [950053664] [2021-11-25 19:50:04,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [950053664] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:50:04,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:50:04,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:50:04,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813769934] [2021-11-25 19:50:04,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:50:04,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:50:04,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:50:04,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:50:04,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:50:04,390 INFO L87 Difference]: Start difference. First operand 1092 states and 1273 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:50:04,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:04,468 INFO L93 Difference]: Finished difference Result 1064 states and 1217 transitions. [2021-11-25 19:50:04,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:50:04,469 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-25 19:50:04,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:04,474 INFO L225 Difference]: With dead ends: 1064 [2021-11-25 19:50:04,475 INFO L226 Difference]: Without dead ends: 1064 [2021-11-25 19:50:04,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:50:04,476 INFO L933 BasicCegarLoop]: 929 mSDtfsCounter, 914 mSDsluCounter, 954 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 922 SdHoareTripleChecker+Valid, 1883 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:04,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [922 Valid, 1883 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:50:04,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2021-11-25 19:50:04,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 1062. [2021-11-25 19:50:04,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1062 states, 659 states have (on average 1.8042488619119879) internal successors, (1189), 1056 states have internal predecessors, (1189), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 5 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-25 19:50:04,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 1215 transitions. [2021-11-25 19:50:04,500 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 1215 transitions. Word has length 20 [2021-11-25 19:50:04,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:50:04,501 INFO L470 AbstractCegarLoop]: Abstraction has 1062 states and 1215 transitions. [2021-11-25 19:50:04,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:50:04,501 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 1215 transitions. [2021-11-25 19:50:04,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-25 19:50:04,502 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:04,502 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:50:04,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:04,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:50:04,714 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-11-25 19:50:04,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:04,715 INFO L85 PathProgramCache]: Analyzing trace with hash 2117531686, now seen corresponding path program 1 times [2021-11-25 19:50:04,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:50:04,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1473265536] [2021-11-25 19:50:04,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:04,715 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:50:04,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:50:04,716 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:50:04,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-25 19:50:04,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:04,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:50:04,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:04,911 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 [2021-11-25 19:50:05,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:50:05,016 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:50:05,016 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:50:05,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1473265536] [2021-11-25 19:50:05,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1473265536] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:50:05,016 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:50:05,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:50:05,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277207770] [2021-11-25 19:50:05,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:50:05,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:50:05,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:50:05,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:50:05,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:50:05,018 INFO L87 Difference]: Start difference. First operand 1062 states and 1215 transitions. Second operand has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:50:06,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:06,852 INFO L93 Difference]: Finished difference Result 1513 states and 1751 transitions. [2021-11-25 19:50:06,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:50:06,852 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-25 19:50:06,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:06,858 INFO L225 Difference]: With dead ends: 1513 [2021-11-25 19:50:06,858 INFO L226 Difference]: Without dead ends: 1513 [2021-11-25 19:50:06,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:50:06,859 INFO L933 BasicCegarLoop]: 513 mSDtfsCounter, 1462 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1462 SdHoareTripleChecker+Valid, 1057 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:06,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1462 Valid, 1057 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 881 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-25 19:50:06,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1513 states. [2021-11-25 19:50:06,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1513 to 1058. [2021-11-25 19:50:06,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 659 states have (on average 1.7921092564491654) internal successors, (1181), 1052 states have internal predecessors, (1181), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 5 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-25 19:50:06,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 1207 transitions. [2021-11-25 19:50:06,883 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 1207 transitions. Word has length 34 [2021-11-25 19:50:06,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:50:06,884 INFO L470 AbstractCegarLoop]: Abstraction has 1058 states and 1207 transitions. [2021-11-25 19:50:06,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:50:06,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 1207 transitions. [2021-11-25 19:50:06,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-25 19:50:06,885 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:06,885 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:50:06,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:07,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:50:07,097 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr53REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-11-25 19:50:07,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:07,098 INFO L85 PathProgramCache]: Analyzing trace with hash 2117531687, now seen corresponding path program 1 times [2021-11-25 19:50:07,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:50:07,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1731197975] [2021-11-25 19:50:07,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:07,099 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:50:07,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:50:07,100 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:50:07,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-25 19:50:07,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:07,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:50:07,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:07,317 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 [2021-11-25 19:50:07,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:50:07,535 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:50:07,535 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:50:07,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1731197975] [2021-11-25 19:50:07,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1731197975] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:50:07,535 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:50:07,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:50:07,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037162744] [2021-11-25 19:50:07,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:50:07,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:50:07,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:50:07,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:50:07,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:50:07,536 INFO L87 Difference]: Start difference. First operand 1058 states and 1207 transitions. Second operand has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:50:10,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:10,601 INFO L93 Difference]: Finished difference Result 1570 states and 1773 transitions. [2021-11-25 19:50:10,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:50:10,603 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-25 19:50:10,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:10,611 INFO L225 Difference]: With dead ends: 1570 [2021-11-25 19:50:10,611 INFO L226 Difference]: Without dead ends: 1570 [2021-11-25 19:50:10,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:50:10,612 INFO L933 BasicCegarLoop]: 1192 mSDtfsCounter, 928 mSDsluCounter, 970 mSDsCounter, 0 mSdLazyCounter, 1180 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 928 SdHoareTripleChecker+Valid, 2162 SdHoareTripleChecker+Invalid, 1194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:10,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [928 Valid, 2162 Invalid, 1194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1180 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-25 19:50:10,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1570 states. [2021-11-25 19:50:10,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1570 to 1054. [2021-11-25 19:50:10,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1054 states, 659 states have (on average 1.779969650986343) internal successors, (1173), 1048 states have internal predecessors, (1173), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 5 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-25 19:50:10,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 1199 transitions. [2021-11-25 19:50:10,638 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 1199 transitions. Word has length 34 [2021-11-25 19:50:10,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:50:10,639 INFO L470 AbstractCegarLoop]: Abstraction has 1054 states and 1199 transitions. [2021-11-25 19:50:10,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:50:10,639 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 1199 transitions. [2021-11-25 19:50:10,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-25 19:50:10,641 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:10,641 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:50:10,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:10,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:50:10,853 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-11-25 19:50:10,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:10,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1509555205, now seen corresponding path program 1 times [2021-11-25 19:50:10,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:50:10,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1914060964] [2021-11-25 19:50:10,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:10,854 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:50:10,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:50:10,855 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:50:10,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-25 19:50:11,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:11,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:50:11,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:11,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:50:11,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:50:11,213 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:50:11,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1914060964] [2021-11-25 19:50:11,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1914060964] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:50:11,213 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:50:11,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:50:11,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683890110] [2021-11-25 19:50:11,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:50:11,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:50:11,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:50:11,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:50:11,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:50:11,215 INFO L87 Difference]: Start difference. First operand 1054 states and 1199 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:50:11,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:11,279 INFO L93 Difference]: Finished difference Result 1042 states and 1179 transitions. [2021-11-25 19:50:11,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:50:11,283 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-25 19:50:11,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:11,289 INFO L225 Difference]: With dead ends: 1042 [2021-11-25 19:50:11,290 INFO L226 Difference]: Without dead ends: 1042 [2021-11-25 19:50:11,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:50:11,291 INFO L933 BasicCegarLoop]: 923 mSDtfsCounter, 890 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 898 SdHoareTripleChecker+Valid, 1861 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:11,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [898 Valid, 1861 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:50:11,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2021-11-25 19:50:11,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 1042. [2021-11-25 19:50:11,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1042 states, 647 states have (on average 1.7820710973724885) internal successors, (1153), 1036 states have internal predecessors, (1153), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 5 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-25 19:50:11,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 1179 transitions. [2021-11-25 19:50:11,311 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 1179 transitions. Word has length 52 [2021-11-25 19:50:11,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:50:11,313 INFO L470 AbstractCegarLoop]: Abstraction has 1042 states and 1179 transitions. [2021-11-25 19:50:11,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:50:11,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 1179 transitions. [2021-11-25 19:50:11,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-25 19:50:11,318 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:11,319 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:50:11,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:11,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:50:11,532 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-11-25 19:50:11,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:11,532 INFO L85 PathProgramCache]: Analyzing trace with hash -881686959, now seen corresponding path program 1 times [2021-11-25 19:50:11,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:50:11,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1921962875] [2021-11-25 19:50:11,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:11,534 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:50:11,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:50:11,535 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:50:11,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-25 19:50:11,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:11,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:50:11,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:11,954 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 [2021-11-25 19:50:11,959 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 [2021-11-25 19:50:12,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:12,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 19:50:12,580 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 19:50:12,581 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 17 treesize of output 17 [2021-11-25 19:50:12,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:50:12,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:50:12,600 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:50:12,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1921962875] [2021-11-25 19:50:12,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1921962875] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:50:12,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:50:12,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:50:12,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805197373] [2021-11-25 19:50:12,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:50:12,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:50:12,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:50:12,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:50:12,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:50:12,602 INFO L87 Difference]: Start difference. First operand 1042 states and 1179 transitions. Second operand has 4 states, 3 states have (on average 20.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:50:14,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:14,809 INFO L93 Difference]: Finished difference Result 1264 states and 1480 transitions. [2021-11-25 19:50:14,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:50:14,809 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 20.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-25 19:50:14,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:14,815 INFO L225 Difference]: With dead ends: 1264 [2021-11-25 19:50:14,815 INFO L226 Difference]: Without dead ends: 1264 [2021-11-25 19:50:14,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:50:14,816 INFO L933 BasicCegarLoop]: 476 mSDtfsCounter, 843 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 758 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:14,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [856 Valid, 758 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-25 19:50:14,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2021-11-25 19:50:14,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 972. [2021-11-25 19:50:14,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 615 states have (on average 1.7056910569105692) internal successors, (1049), 966 states have internal predecessors, (1049), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 5 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-25 19:50:14,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1075 transitions. [2021-11-25 19:50:14,834 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1075 transitions. Word has length 60 [2021-11-25 19:50:14,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:50:14,835 INFO L470 AbstractCegarLoop]: Abstraction has 972 states and 1075 transitions. [2021-11-25 19:50:14,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 20.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:50:14,835 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1075 transitions. [2021-11-25 19:50:14,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-25 19:50:14,836 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:14,836 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:50:14,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-25 19:50:15,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:50:15,051 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr76REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-11-25 19:50:15,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:15,051 INFO L85 PathProgramCache]: Analyzing trace with hash -855470841, now seen corresponding path program 1 times [2021-11-25 19:50:15,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:50:15,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1957205646] [2021-11-25 19:50:15,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:15,052 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:50:15,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:50:15,053 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:50:15,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-25 19:50:15,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:15,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:50:15,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:15,434 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 [2021-11-25 19:50:15,449 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 [2021-11-25 19:50:15,482 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 [2021-11-25 19:50:15,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:50:15,494 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:50:15,494 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:50:15,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1957205646] [2021-11-25 19:50:15,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1957205646] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:50:15,494 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:50:15,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:50:15,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447763263] [2021-11-25 19:50:15,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:50:15,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:50:15,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:50:15,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:50:15,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:50:15,496 INFO L87 Difference]: Start difference. First operand 972 states and 1075 transitions. Second operand has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:50:17,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:17,638 INFO L93 Difference]: Finished difference Result 971 states and 1074 transitions. [2021-11-25 19:50:17,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:50:17,639 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-25 19:50:17,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:17,643 INFO L225 Difference]: With dead ends: 971 [2021-11-25 19:50:17,643 INFO L226 Difference]: Without dead ends: 971 [2021-11-25 19:50:17,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:50:17,644 INFO L933 BasicCegarLoop]: 883 mSDtfsCounter, 4 mSDsluCounter, 1411 mSDsCounter, 0 mSdLazyCounter, 1243 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 2294 SdHoareTripleChecker+Invalid, 1244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:17,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 2294 Invalid, 1244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1243 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-25 19:50:17,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-11-25 19:50:17,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 971. [2021-11-25 19:50:17,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 615 states have (on average 1.7040650406504065) internal successors, (1048), 965 states have internal predecessors, (1048), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 5 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-25 19:50:17,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1074 transitions. [2021-11-25 19:50:17,661 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1074 transitions. Word has length 65 [2021-11-25 19:50:17,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:50:17,662 INFO L470 AbstractCegarLoop]: Abstraction has 971 states and 1074 transitions. [2021-11-25 19:50:17,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:50:17,662 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1074 transitions. [2021-11-25 19:50:17,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-25 19:50:17,663 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:17,663 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:50:17,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-25 19:50:17,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:50:17,883 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr77REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-11-25 19:50:17,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:17,883 INFO L85 PathProgramCache]: Analyzing trace with hash -855470840, now seen corresponding path program 1 times [2021-11-25 19:50:17,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:50:17,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1510607086] [2021-11-25 19:50:17,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:17,885 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:50:17,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:50:17,886 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:50:17,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-25 19:50:18,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:18,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 19:50:18,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:18,267 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 [2021-11-25 19:50:18,298 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 [2021-11-25 19:50:18,305 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 [2021-11-25 19:50:18,364 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 21 treesize of output 9 [2021-11-25 19:50:18,369 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 19 treesize of output 7 [2021-11-25 19:50:18,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:50:18,390 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:50:18,390 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:50:18,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1510607086] [2021-11-25 19:50:18,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1510607086] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:50:18,391 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:50:18,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:50:18,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305241222] [2021-11-25 19:50:18,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:50:18,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:50:18,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:50:18,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:50:18,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:50:18,393 INFO L87 Difference]: Start difference. First operand 971 states and 1074 transitions. Second operand has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:50:21,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:21,066 INFO L93 Difference]: Finished difference Result 970 states and 1073 transitions. [2021-11-25 19:50:21,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:50:21,067 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-25 19:50:21,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:21,070 INFO L225 Difference]: With dead ends: 970 [2021-11-25 19:50:21,070 INFO L226 Difference]: Without dead ends: 970 [2021-11-25 19:50:21,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:50:21,071 INFO L933 BasicCegarLoop]: 883 mSDtfsCounter, 2 mSDsluCounter, 1447 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2330 SdHoareTripleChecker+Invalid, 1206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:21,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2330 Invalid, 1206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1205 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-25 19:50:21,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2021-11-25 19:50:21,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 970. [2021-11-25 19:50:21,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 970 states, 614 states have (on average 1.705211726384365) internal successors, (1047), 964 states have internal predecessors, (1047), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 5 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-25 19:50:21,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 1073 transitions. [2021-11-25 19:50:21,089 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 1073 transitions. Word has length 65 [2021-11-25 19:50:21,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:50:21,090 INFO L470 AbstractCegarLoop]: Abstraction has 970 states and 1073 transitions. [2021-11-25 19:50:21,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:50:21,090 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 1073 transitions. [2021-11-25 19:50:21,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-25 19:50:21,091 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:21,091 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:50:21,116 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-25 19:50:21,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:50:21,316 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-11-25 19:50:21,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:21,317 INFO L85 PathProgramCache]: Analyzing trace with hash 864578415, now seen corresponding path program 1 times [2021-11-25 19:50:21,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:50:21,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1194753475] [2021-11-25 19:50:21,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:21,318 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:50:21,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:50:21,319 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:50:21,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-25 19:50:21,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:21,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:50:21,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:21,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:50:21,745 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:50:21,745 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:50:21,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1194753475] [2021-11-25 19:50:21,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1194753475] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:50:21,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:50:21,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:50:21,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145418664] [2021-11-25 19:50:21,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:50:21,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:50:21,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:50:21,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:50:21,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:50:21,747 INFO L87 Difference]: Start difference. First operand 970 states and 1073 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:50:21,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:21,793 INFO L93 Difference]: Finished difference Result 973 states and 1077 transitions. [2021-11-25 19:50:21,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:50:21,794 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2021-11-25 19:50:21,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:21,799 INFO L225 Difference]: With dead ends: 973 [2021-11-25 19:50:21,799 INFO L226 Difference]: Without dead ends: 973 [2021-11-25 19:50:21,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:50:21,800 INFO L933 BasicCegarLoop]: 883 mSDtfsCounter, 2 mSDsluCounter, 1761 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2644 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:21,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2644 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:50:21,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2021-11-25 19:50:21,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 973. [2021-11-25 19:50:21,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 616 states have (on average 1.7045454545454546) internal successors, (1050), 967 states have internal predecessors, (1050), 13 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (14), 5 states have call predecessors, (14), 13 states have call successors, (14) [2021-11-25 19:50:21,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1077 transitions. [2021-11-25 19:50:21,822 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1077 transitions. Word has length 73 [2021-11-25 19:50:21,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:50:21,822 INFO L470 AbstractCegarLoop]: Abstraction has 973 states and 1077 transitions. [2021-11-25 19:50:21,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:50:21,823 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1077 transitions. [2021-11-25 19:50:21,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-25 19:50:21,824 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:21,824 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:50:21,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:22,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:50:22,038 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-11-25 19:50:22,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:22,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1994106300, now seen corresponding path program 1 times [2021-11-25 19:50:22,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:50:22,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [263918859] [2021-11-25 19:50:22,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:22,039 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:50:22,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:50:22,040 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:50:22,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-25 19:50:22,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:22,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:50:22,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:22,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:50:22,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:50:22,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:50:22,633 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:50:22,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [263918859] [2021-11-25 19:50:22,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [263918859] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:50:22,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1419198677] [2021-11-25 19:50:22,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:22,634 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:50:22,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:50:22,638 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:50:22,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-25 19:50:23,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:23,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:50:23,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:23,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:50:23,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:50:23,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:50:23,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1419198677] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:50:23,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177246720] [2021-11-25 19:50:23,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:23,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:50:23,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:50:23,362 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:50:23,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-25 19:50:23,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:23,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:50:23,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:23,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:50:23,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:50:23,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:50:23,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177246720] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:50:23,874 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:50:23,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-25 19:50:23,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115129550] [2021-11-25 19:50:23,875 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:50:23,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 19:50:23,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:50:23,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 19:50:23,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:50:23,876 INFO L87 Difference]: Start difference. First operand 973 states and 1077 transitions. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 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) [2021-11-25 19:50:24,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:24,085 INFO L93 Difference]: Finished difference Result 985 states and 1094 transitions. [2021-11-25 19:50:24,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 19:50:24,086 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 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 74 [2021-11-25 19:50:24,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:24,091 INFO L225 Difference]: With dead ends: 985 [2021-11-25 19:50:24,092 INFO L226 Difference]: Without dead ends: 985 [2021-11-25 19:50:24,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 432 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-11-25 19:50:24,093 INFO L933 BasicCegarLoop]: 884 mSDtfsCounter, 12 mSDsluCounter, 4396 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 5280 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:24,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 5280 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:50:24,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2021-11-25 19:50:24,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 983. [2021-11-25 19:50:24,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 983 states, 625 states have (on average 1.704) internal successors, (1065), 976 states have internal predecessors, (1065), 13 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (14), 5 states have call predecessors, (14), 13 states have call successors, (14) [2021-11-25 19:50:24,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 983 states to 983 states and 1092 transitions. [2021-11-25 19:50:24,114 INFO L78 Accepts]: Start accepts. Automaton has 983 states and 1092 transitions. Word has length 74 [2021-11-25 19:50:24,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:50:24,115 INFO L470 AbstractCegarLoop]: Abstraction has 983 states and 1092 transitions. [2021-11-25 19:50:24,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 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) [2021-11-25 19:50:24,115 INFO L276 IsEmpty]: Start isEmpty. Operand 983 states and 1092 transitions. [2021-11-25 19:50:24,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-25 19:50:24,116 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:24,116 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:50:24,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:24,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:24,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:24,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:50:24,731 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-11-25 19:50:24,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:24,731 INFO L85 PathProgramCache]: Analyzing trace with hash 195761839, now seen corresponding path program 2 times [2021-11-25 19:50:24,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:50:24,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [537292186] [2021-11-25 19:50:24,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:50:24,732 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:50:24,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:50:24,733 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:50:24,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-25 19:50:25,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 19:50:25,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:50:25,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:50:25,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:25,356 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:50:25,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:50:25,617 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:50:25,618 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:50:25,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [537292186] [2021-11-25 19:50:25,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [537292186] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:50:25,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1991861436] [2021-11-25 19:50:25,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:50:25,618 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:50:25,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:50:25,619 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:50:25,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-25 19:50:27,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 19:50:27,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:50:27,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:50:27,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:27,220 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:50:27,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:50:27,361 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:50:27,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1991861436] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:50:27,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599986146] [2021-11-25 19:50:27,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:50:27,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:50:27,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:50:27,362 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:50:27,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-25 19:50:51,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 19:50:51,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:50:51,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-25 19:50:51,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:51,286 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 [2021-11-25 19:50:51,466 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 [2021-11-25 19:50:51,478 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 19:50:51,479 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 16 treesize of output 16 [2021-11-25 19:50:51,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2021-11-25 19:50:51,555 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 [2021-11-25 19:50:51,756 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 22 treesize of output 10 [2021-11-25 19:50:51,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-11-25 19:50:51,895 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1620 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1620))) (exists ((v_ArrVal_1619 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1619) |c_#memory_$Pointer$.base|)) (exists ((v_arrayElimCell_16 (_ BitVec 32))) (= (select |c_#length| v_arrayElimCell_16) (_ bv44 32)))) is different from true [2021-11-25 19:50:51,923 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1621 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1621))) (exists ((v_ArrVal_1622 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1622) |c_#memory_$Pointer$.base|)) (exists ((v_arrayElimCell_16 (_ BitVec 32))) (= (select |c_#length| v_arrayElimCell_16) (_ bv44 32)))) is different from true [2021-11-25 19:50:52,071 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1626 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1626) |c_#memory_$Pointer$.base|)) (exists ((v_arrayElimCell_16 (_ BitVec 32))) (= (select |c_#length| v_arrayElimCell_16) (_ bv44 32))) (exists ((v_ArrVal_1625 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1625)))) is different from true [2021-11-25 19:50:52,138 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 19:50:52,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2021-11-25 19:50:52,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2021-11-25 19:50:52,247 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 31 treesize of output 13 [2021-11-25 19:50:52,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-25 19:50:52,315 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2021-11-25 19:50:52,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:50:52,794 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1638 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1637 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem38#1.base| v_ArrVal_1638) |c_ULTIMATE.start_main_~user~0#1.base|) .cse0) (_ bv20 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem38#1.base| v_ArrVal_1637) |c_ULTIMATE.start_main_~user~0#1.base|) .cse0))))) (forall ((v_ArrVal_1638 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem38#1.base| v_ArrVal_1638) |c_ULTIMATE.start_main_~user~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|)))) (bvule (bvadd (_ bv16 32) .cse1) (bvadd .cse1 (_ bv20 32)))))) is different from false [2021-11-25 19:50:52,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599986146] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:50:52,804 INFO L186 FreeRefinementEngine]: Found 0 perfect and 5 imperfect interpolant sequences. [2021-11-25 19:50:52,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 11] total 24 [2021-11-25 19:50:52,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409086443] [2021-11-25 19:50:52,805 INFO L85 oduleStraightlineAll]: Using 5 imperfect interpolants to construct interpolant automaton [2021-11-25 19:50:52,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-25 19:50:52,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:50:52,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-25 19:50:52,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=418, Unknown=13, NotChecked=180, Total=702 [2021-11-25 19:50:52,807 INFO L87 Difference]: Start difference. First operand 983 states and 1092 transitions. Second operand has 24 states, 23 states have (on average 6.6521739130434785) internal successors, (153), 24 states have internal predecessors, (153), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 19:50:53,835 WARN L860 $PredicateComparison]: unable to prove that (and (not (= |c_#Ultimate.C_memset_#amount| (_ bv44 32))) (exists ((v_ArrVal_1626 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1626) |c_#memory_$Pointer$.base|)) (exists ((v_arrayElimCell_16 (_ BitVec 32))) (= (select |c_#length| v_arrayElimCell_16) (_ bv44 32))) (exists ((v_ArrVal_1625 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_1625)))) is different from true [2021-11-25 19:51:02,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:51:02,247 INFO L93 Difference]: Finished difference Result 1275 states and 1474 transitions. [2021-11-25 19:51:02,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-25 19:51:02,248 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 6.6521739130434785) internal successors, (153), 24 states have internal predecessors, (153), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 77 [2021-11-25 19:51:02,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:51:02,257 INFO L225 Difference]: With dead ends: 1275 [2021-11-25 19:51:02,258 INFO L226 Difference]: Without dead ends: 1269 [2021-11-25 19:51:02,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 359 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=323, Invalid=1537, Unknown=52, NotChecked=440, Total=2352 [2021-11-25 19:51:02,260 INFO L933 BasicCegarLoop]: 590 mSDtfsCounter, 609 mSDsluCounter, 4928 mSDsCounter, 0 mSdLazyCounter, 3632 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 619 SdHoareTripleChecker+Valid, 5518 SdHoareTripleChecker+Invalid, 8451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 3632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4796 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:51:02,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [619 Valid, 5518 Invalid, 8451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 3632 Invalid, 0 Unknown, 4796 Unchecked, 7.8s Time] [2021-11-25 19:51:02,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2021-11-25 19:51:02,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 997. [2021-11-25 19:51:02,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 638 states have (on average 1.6943573667711598) internal successors, (1081), 989 states have internal predecessors, (1081), 13 states have call successors, (13), 3 states have call predecessors, (13), 5 states have return successors, (15), 6 states have call predecessors, (15), 13 states have call successors, (15) [2021-11-25 19:51:02,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1109 transitions. [2021-11-25 19:51:02,288 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1109 transitions. Word has length 77 [2021-11-25 19:51:02,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:51:02,289 INFO L470 AbstractCegarLoop]: Abstraction has 997 states and 1109 transitions. [2021-11-25 19:51:02,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 6.6521739130434785) internal successors, (153), 24 states have internal predecessors, (153), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 19:51:02,289 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1109 transitions. [2021-11-25 19:51:02,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-25 19:51:02,291 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:51:02,291 INFO L514 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:51:02,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-25 19:51:02,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-25 19:51:02,710 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-25 19:51:02,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:51:02,898 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr80REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-11-25 19:51:02,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:51:02,899 INFO L85 PathProgramCache]: Analyzing trace with hash -904609989, now seen corresponding path program 1 times [2021-11-25 19:51:02,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:51:02,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1901179019] [2021-11-25 19:51:02,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:51:02,899 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:51:02,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:51:02,900 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:51:02,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-25 19:51:03,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:51:03,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 19:51:03,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:51:03,554 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:51:03,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:51:04,168 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:51:04,168 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:51:04,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1901179019] [2021-11-25 19:51:04,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1901179019] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:51:04,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1681435154] [2021-11-25 19:51:04,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:51:04,169 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:51:04,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:51:04,174 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:51:04,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-25 19:51:04,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:51:04,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 19:51:04,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:51:04,961 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:51:04,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:51:05,187 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:51:05,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1681435154] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:51:05,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192096075] [2021-11-25 19:51:05,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:51:05,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:51:05,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:51:05,188 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:51:05,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-25 19:51:05,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:51:05,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 19:51:05,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:51:05,715 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:51:05,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:51:06,698 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:51:06,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192096075] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:51:06,698 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:51:06,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 35 [2021-11-25 19:51:06,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25158074] [2021-11-25 19:51:06,702 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:51:06,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-25 19:51:06,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:51:06,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-25 19:51:06,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=808, Unknown=0, NotChecked=0, Total=1190 [2021-11-25 19:51:06,706 INFO L87 Difference]: Start difference. First operand 997 states and 1109 transitions. Second operand has 35 states, 35 states have (on average 3.0) internal successors, (105), 35 states have internal predecessors, (105), 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) [2021-11-25 19:51:10,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:51:10,086 INFO L93 Difference]: Finished difference Result 1029 states and 1152 transitions. [2021-11-25 19:51:10,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-25 19:51:10,087 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.0) internal successors, (105), 35 states have internal predecessors, (105), 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 82 [2021-11-25 19:51:10,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:51:10,092 INFO L225 Difference]: With dead ends: 1029 [2021-11-25 19:51:10,093 INFO L226 Difference]: Without dead ends: 1023 [2021-11-25 19:51:10,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1371, Invalid=2789, Unknown=0, NotChecked=0, Total=4160 [2021-11-25 19:51:10,095 INFO L933 BasicCegarLoop]: 891 mSDtfsCounter, 116 mSDsluCounter, 14148 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 15039 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:51:10,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 15039 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-25 19:51:10,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2021-11-25 19:51:10,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 1007. [2021-11-25 19:51:10,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1007 states, 649 states have (on average 1.6856702619414483) internal successors, (1094), 1000 states have internal predecessors, (1094), 13 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (14), 5 states have call predecessors, (14), 13 states have call successors, (14) [2021-11-25 19:51:10,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1007 states to 1007 states and 1121 transitions. [2021-11-25 19:51:10,117 INFO L78 Accepts]: Start accepts. Automaton has 1007 states and 1121 transitions. Word has length 82 [2021-11-25 19:51:10,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:51:10,118 INFO L470 AbstractCegarLoop]: Abstraction has 1007 states and 1121 transitions. [2021-11-25 19:51:10,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.0) internal successors, (105), 35 states have internal predecessors, (105), 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) [2021-11-25 19:51:10,118 INFO L276 IsEmpty]: Start isEmpty. Operand 1007 states and 1121 transitions. [2021-11-25 19:51:10,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-25 19:51:10,119 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:51:10,119 INFO L514 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:51:10,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2021-11-25 19:51:10,348 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-11-25 19:51:10,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-25 19:51:10,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:51:10,724 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-11-25 19:51:10,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:51:10,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1635155025, now seen corresponding path program 3 times [2021-11-25 19:51:10,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:51:10,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [559055553] [2021-11-25 19:51:10,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:51:10,726 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:51:10,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:51:10,727 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:51:10,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-25 19:51:12,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-25 19:51:12,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:51:12,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-25 19:51:12,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:51:12,630 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:51:12,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:51:15,111 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:51:15,111 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:51:15,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [559055553] [2021-11-25 19:51:15,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [559055553] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:51:15,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [649447631] [2021-11-25 19:51:15,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:51:15,112 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:51:15,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:51:15,113 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:51:15,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-25 19:51:39,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-25 19:51:39,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:51:39,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-25 19:51:39,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:51:39,610 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:51:39,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:51:40,255 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:51:40,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [649447631] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:51:40,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901204303] [2021-11-25 19:51:40,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:51:40,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:51:40,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:51:40,263 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:51:40,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0b7652f-2b15-43f4-876b-b552a645ef8a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process