./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-2.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_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/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_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/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_a3287f65-aa8d-4726-8aac-99c5b4ba252f/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 6d35be8b8e312d4eada0f7530ae9d43ecf1865be922a243e0781a735d175935c --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:57:13,309 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:57:13,312 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:57:13,365 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:57:13,366 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:57:13,371 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:57:13,372 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:57:13,376 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:57:13,379 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:57:13,384 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:57:13,385 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:57:13,387 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:57:13,388 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:57:13,391 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:57:13,393 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:57:13,397 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:57:13,399 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:57:13,401 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:57:13,403 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:57:13,411 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:57:13,413 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:57:13,415 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:57:13,418 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:57:13,419 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:57:13,428 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:57:13,429 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:57:13,429 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:57:13,431 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:57:13,432 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:57:13,433 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:57:13,434 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:57:13,435 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:57:13,437 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:57:13,438 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:57:13,440 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:57:13,440 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:57:13,441 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:57:13,441 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:57:13,441 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:57:13,442 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:57:13,443 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:57:13,444 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-25 18:57:13,488 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:57:13,488 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:57:13,489 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:57:13,489 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:57:13,490 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:57:13,490 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:57:13,491 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:57:13,491 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:57:13,491 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:57:13,491 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:57:13,492 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:57:13,492 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:57:13,492 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:57:13,493 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:57:13,493 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:57:13,493 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:57:13,493 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:57:13,494 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:57:13,494 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 18:57:13,495 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 18:57:13,495 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:57:13,495 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:57:13,496 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 18:57:13,497 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:57:13,498 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:57:13,498 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:57:13,498 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 18:57:13,498 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 18:57:13,499 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-25 18:57:13,499 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:57:13,499 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 18:57:13,500 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:57:13,500 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:57:13,500 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:57:13,500 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:57:13,501 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:57:13,501 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:57:13,501 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:57:13,502 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:57:13,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:57:13,502 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:57:13,502 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:57:13,503 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_a3287f65-aa8d-4726-8aac-99c5b4ba252f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6d35be8b8e312d4eada0f7530ae9d43ecf1865be922a243e0781a735d175935c [2021-11-25 18:57:13,831 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:57:13,874 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:57:13,876 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:57:13,878 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:57:13,879 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:57:13,881 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-2.i [2021-11-25 18:57:13,963 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/data/1706c3c56/b144e5372cf1429b9969acb886e21fc6/FLAG55a784962 [2021-11-25 18:57:14,634 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:57:14,635 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-2.i [2021-11-25 18:57:14,653 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/data/1706c3c56/b144e5372cf1429b9969acb886e21fc6/FLAG55a784962 [2021-11-25 18:57:14,843 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/data/1706c3c56/b144e5372cf1429b9969acb886e21fc6 [2021-11-25 18:57:14,847 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:57:14,850 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:57:14,854 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:57:14,854 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:57:14,858 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:57:14,858 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:57:14" (1/1) ... [2021-11-25 18:57:14,861 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a1ccae1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:14, skipping insertion in model container [2021-11-25 18:57:14,861 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:57:14" (1/1) ... [2021-11-25 18:57:14,867 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:57:14,945 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:57:15,438 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_a3287f65-aa8d-4726-8aac-99c5b4ba252f/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-2.i[33021,33034] [2021-11-25 18:57:15,644 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:57:15,653 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 18:57:15,654 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@72a3da1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:15, skipping insertion in model container [2021-11-25 18:57:15,654 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:57:15,655 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-25 18:57:15,657 INFO L158 Benchmark]: Toolchain (without parser) took 805.71ms. Allocated memory was 81.8MB in the beginning and 113.2MB in the end (delta: 31.5MB). Free memory was 44.6MB in the beginning and 78.3MB in the end (delta: -33.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-25 18:57:15,657 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 81.8MB. Free memory was 53.8MB in the beginning and 53.7MB in the end (delta: 25.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 18:57:15,658 INFO L158 Benchmark]: CACSL2BoogieTranslator took 801.09ms. Allocated memory was 81.8MB in the beginning and 113.2MB in the end (delta: 31.5MB). Free memory was 44.3MB in the beginning and 78.3MB in the end (delta: -34.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-25 18:57:15,660 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 81.8MB. Free memory was 53.8MB in the beginning and 53.7MB in the end (delta: 25.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 801.09ms. Allocated memory was 81.8MB in the beginning and 113.2MB in the end (delta: 31.5MB). Free memory was 44.3MB in the beginning and 78.3MB in the end (delta: -34.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 752]: 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_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/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_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/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_a3287f65-aa8d-4726-8aac-99c5b4ba252f/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 6d35be8b8e312d4eada0f7530ae9d43ecf1865be922a243e0781a735d175935c --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:57:17,817 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:57:17,825 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:57:17,857 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:57:17,857 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:57:17,859 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:57:17,861 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:57:17,863 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:57:17,866 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:57:17,867 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:57:17,868 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:57:17,870 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:57:17,870 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:57:17,872 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:57:17,874 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:57:17,875 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:57:17,876 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:57:17,877 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:57:17,880 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:57:17,883 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:57:17,885 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:57:17,886 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:57:17,888 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:57:17,889 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:57:17,893 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:57:17,893 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:57:17,898 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:57:17,900 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:57:17,900 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:57:17,901 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:57:17,902 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:57:17,903 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:57:17,906 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:57:17,907 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:57:17,910 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:57:17,911 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:57:17,912 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:57:17,913 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:57:17,913 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:57:17,914 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:57:17,916 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:57:17,917 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-25 18:57:17,966 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:57:17,970 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:57:17,971 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:57:17,971 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:57:17,972 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:57:17,972 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:57:17,972 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:57:17,973 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:57:17,973 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:57:17,973 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:57:17,974 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:57:17,974 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:57:17,976 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 18:57:17,976 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 18:57:17,976 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:57:17,977 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:57:17,977 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 18:57:17,977 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:57:17,977 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:57:17,977 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:57:17,978 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 18:57:17,978 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 18:57:17,978 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-25 18:57:17,978 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:57:17,978 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 18:57:17,979 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-25 18:57:17,979 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-25 18:57:17,979 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:57:17,979 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:57:17,980 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:57:17,980 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-25 18:57:17,980 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:57:17,980 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:57:17,981 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:57:17,981 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:57:17,982 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-25 18:57:17,982 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-25 18:57:17,982 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:57:17,982 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:57:17,983 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_a3287f65-aa8d-4726-8aac-99c5b4ba252f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6d35be8b8e312d4eada0f7530ae9d43ecf1865be922a243e0781a735d175935c [2021-11-25 18:57:18,384 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:57:18,403 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:57:18,405 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:57:18,406 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:57:18,407 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:57:18,408 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-2.i [2021-11-25 18:57:18,497 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/data/6cf55d3ce/98406e6dbbd5479fb74577546eef3410/FLAGcacc135dd [2021-11-25 18:57:19,175 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:57:19,181 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-2.i [2021-11-25 18:57:19,207 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/data/6cf55d3ce/98406e6dbbd5479fb74577546eef3410/FLAGcacc135dd [2021-11-25 18:57:19,383 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/data/6cf55d3ce/98406e6dbbd5479fb74577546eef3410 [2021-11-25 18:57:19,385 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:57:19,386 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:57:19,387 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:57:19,388 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:57:19,392 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:57:19,393 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:57:19" (1/1) ... [2021-11-25 18:57:19,395 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74b073ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:19, skipping insertion in model container [2021-11-25 18:57:19,396 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:57:19" (1/1) ... [2021-11-25 18:57:19,403 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:57:19,474 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:57:20,034 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_a3287f65-aa8d-4726-8aac-99c5b4ba252f/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-2.i[33021,33034] [2021-11-25 18:57:20,262 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:57:20,275 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-25 18:57:20,298 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:57:20,327 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_a3287f65-aa8d-4726-8aac-99c5b4ba252f/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-2.i[33021,33034] [2021-11-25 18:57:20,464 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:57:20,477 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:57:20,517 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_a3287f65-aa8d-4726-8aac-99c5b4ba252f/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-2.i[33021,33034] [2021-11-25 18:57:20,571 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:57:20,613 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:57:20,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:20 WrapperNode [2021-11-25 18:57:20,613 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:57:20,614 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:57:20,615 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:57:20,615 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:57:20,622 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:20" (1/1) ... [2021-11-25 18:57:20,704 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:20" (1/1) ... [2021-11-25 18:57:20,787 INFO L137 Inliner]: procedures = 180, calls = 400, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1330 [2021-11-25 18:57:20,787 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:57:20,788 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:57:20,788 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:57:20,788 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:57:20,797 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:20" (1/1) ... [2021-11-25 18:57:20,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:20" (1/1) ... [2021-11-25 18:57:20,805 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:20" (1/1) ... [2021-11-25 18:57:20,806 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:20" (1/1) ... [2021-11-25 18:57:20,882 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:20" (1/1) ... [2021-11-25 18:57:20,907 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:20" (1/1) ... [2021-11-25 18:57:20,919 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:20" (1/1) ... [2021-11-25 18:57:20,932 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:57:20,946 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:57:20,946 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:57:20,946 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:57:20,947 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:20" (1/1) ... [2021-11-25 18:57:20,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:57:20,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:57:20,978 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:57:20,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:57:21,032 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-25 18:57:21,032 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-25 18:57:21,032 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-25 18:57:21,033 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-25 18:57:21,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-25 18:57:21,033 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-25 18:57:21,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 18:57:21,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:57:21,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 18:57:21,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 18:57:21,034 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 18:57:21,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:57:21,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-25 18:57:21,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-25 18:57:21,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:57:21,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:57:21,253 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:57:21,268 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:57:21,272 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-25 18:57:26,999 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:57:27,015 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:57:27,015 INFO L301 CfgBuilder]: Removed 69 assume(true) statements. [2021-11-25 18:57:27,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:57:27 BoogieIcfgContainer [2021-11-25 18:57:27,019 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:57:27,022 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:57:27,023 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:57:27,025 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:57:27,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:57:19" (1/3) ... [2021-11-25 18:57:27,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38dceb49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:57:27, skipping insertion in model container [2021-11-25 18:57:27,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:57:20" (2/3) ... [2021-11-25 18:57:27,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38dceb49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:57:27, skipping insertion in model container [2021-11-25 18:57:27,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:57:27" (3/3) ... [2021-11-25 18:57:27,030 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_BER_test4-2.i [2021-11-25 18:57:27,036 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:57:27,036 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 753 error locations. [2021-11-25 18:57:27,079 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:57:27,086 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 18:57:27,087 INFO L340 AbstractCegarLoop]: Starting to check reachability of 753 error locations. [2021-11-25 18:57:27,131 INFO L276 IsEmpty]: Start isEmpty. Operand has 1473 states, 707 states have (on average 2.267326732673267) internal successors, (1603), 1464 states have internal predecessors, (1603), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-25 18:57:27,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-25 18:57:27,137 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:57:27,138 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-25 18:57:27,138 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 749 more)] === [2021-11-25 18:57:27,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:57:27,144 INFO L85 PathProgramCache]: Analyzing trace with hash 37287509, now seen corresponding path program 1 times [2021-11-25 18:57:27,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:57:27,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [282145598] [2021-11-25 18:57:27,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:57:27,156 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:57:27,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:57:27,160 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:57:27,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-25 18:57:27,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:57:27,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-25 18:57:27,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:57:27,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:57:27,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:57:27,371 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:57:27,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [282145598] [2021-11-25 18:57:27,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [282145598] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:57:27,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:57:27,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:57:27,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034774091] [2021-11-25 18:57:27,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:57:27,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 18:57:27,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:57:27,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 18:57:27,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 18:57:27,435 INFO L87 Difference]: Start difference. First operand has 1473 states, 707 states have (on average 2.267326732673267) internal successors, (1603), 1464 states have internal predecessors, (1603), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:57:27,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:57:27,550 INFO L93 Difference]: Finished difference Result 1455 states and 1540 transitions. [2021-11-25 18:57:27,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 18:57:27,552 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-25 18:57:27,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:57:27,589 INFO L225 Difference]: With dead ends: 1455 [2021-11-25 18:57:27,597 INFO L226 Difference]: Without dead ends: 1453 [2021-11-25 18:57:27,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 18:57:27,605 INFO L933 BasicCegarLoop]: 1540 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1540 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:57:27,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1540 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:57:27,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1453 states. [2021-11-25 18:57:27,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1453 to 1453. [2021-11-25 18:57:27,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1453 states, 698 states have (on average 2.157593123209169) internal successors, (1506), 1444 states have internal predecessors, (1506), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-25 18:57:27,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1453 states to 1453 states and 1538 transitions. [2021-11-25 18:57:27,730 INFO L78 Accepts]: Start accepts. Automaton has 1453 states and 1538 transitions. Word has length 5 [2021-11-25 18:57:27,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:57:27,730 INFO L470 AbstractCegarLoop]: Abstraction has 1453 states and 1538 transitions. [2021-11-25 18:57:27,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:57:27,731 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states and 1538 transitions. [2021-11-25 18:57:27,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-25 18:57:27,731 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:57:27,732 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-25 18:57:27,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-25 18:57:27,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:57:27,943 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 749 more)] === [2021-11-25 18:57:27,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:57:27,944 INFO L85 PathProgramCache]: Analyzing trace with hash 37287571, now seen corresponding path program 1 times [2021-11-25 18:57:27,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:57:27,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1005689776] [2021-11-25 18:57:27,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:57:27,945 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:57:27,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:57:27,946 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:57:27,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-25 18:57:28,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:57:28,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:57:28,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:57:28,160 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 18:57:28,173 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 18:57:28,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:57:28,173 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:57:28,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1005689776] [2021-11-25 18:57:28,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1005689776] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:57:28,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:57:28,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:57:28,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375041751] [2021-11-25 18:57:28,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:57:28,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:57:28,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:57:28,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:57:28,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:57:28,187 INFO L87 Difference]: Start difference. First operand 1453 states and 1538 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:57:30,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:57:30,996 INFO L93 Difference]: Finished difference Result 1490 states and 1588 transitions. [2021-11-25 18:57:30,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:57:30,996 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-25 18:57:30,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:57:31,005 INFO L225 Difference]: With dead ends: 1490 [2021-11-25 18:57:31,005 INFO L226 Difference]: Without dead ends: 1490 [2021-11-25 18:57:31,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:57:31,007 INFO L933 BasicCegarLoop]: 810 mSDtfsCounter, 1159 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1175 SdHoareTripleChecker+Valid, 1015 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:57:31,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1175 Valid, 1015 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-25 18:57:31,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2021-11-25 18:57:31,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 1436. [2021-11-25 18:57:31,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 774 states have (on average 2.0) internal successors, (1548), 1427 states have internal predecessors, (1548), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-25 18:57:31,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 1580 transitions. [2021-11-25 18:57:31,045 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 1580 transitions. Word has length 5 [2021-11-25 18:57:31,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:57:31,046 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 1580 transitions. [2021-11-25 18:57:31,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:57:31,046 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 1580 transitions. [2021-11-25 18:57:31,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-25 18:57:31,047 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:57:31,047 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-25 18:57:31,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:57:31,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:57:31,258 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 749 more)] === [2021-11-25 18:57:31,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:57:31,259 INFO L85 PathProgramCache]: Analyzing trace with hash 37287572, now seen corresponding path program 1 times [2021-11-25 18:57:31,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:57:31,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1099026487] [2021-11-25 18:57:31,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:57:31,259 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:57:31,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:57:31,260 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:57:31,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-25 18:57:31,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:57:31,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 18:57:31,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:57:31,417 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 18:57:31,438 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 18:57:31,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:57:31,439 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:57:31,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1099026487] [2021-11-25 18:57:31,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1099026487] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:57:31,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:57:31,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:57:31,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911370446] [2021-11-25 18:57:31,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:57:31,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:57:31,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:57:31,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:57:31,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:57:31,441 INFO L87 Difference]: Start difference. First operand 1436 states and 1580 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:57:34,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:57:34,922 INFO L93 Difference]: Finished difference Result 1739 states and 1903 transitions. [2021-11-25 18:57:34,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:57:34,922 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-25 18:57:34,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:57:34,932 INFO L225 Difference]: With dead ends: 1739 [2021-11-25 18:57:34,933 INFO L226 Difference]: Without dead ends: 1739 [2021-11-25 18:57:34,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:57:34,934 INFO L933 BasicCegarLoop]: 1206 mSDtfsCounter, 504 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 1796 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:57:34,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 1796 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 900 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-25 18:57:34,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1739 states. [2021-11-25 18:57:34,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1739 to 1592. [2021-11-25 18:57:34,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1592 states, 940 states have (on average 1.9723404255319148) internal successors, (1854), 1583 states have internal predecessors, (1854), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-25 18:57:34,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1592 states to 1592 states and 1886 transitions. [2021-11-25 18:57:34,980 INFO L78 Accepts]: Start accepts. Automaton has 1592 states and 1886 transitions. Word has length 5 [2021-11-25 18:57:34,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:57:34,980 INFO L470 AbstractCegarLoop]: Abstraction has 1592 states and 1886 transitions. [2021-11-25 18:57:34,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:57:34,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1592 states and 1886 transitions. [2021-11-25 18:57:34,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 18:57:34,981 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:57:34,982 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 18:57:34,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:57:35,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:57:35,190 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr640REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 749 more)] === [2021-11-25 18:57:35,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:57:35,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1157601995, now seen corresponding path program 1 times [2021-11-25 18:57:35,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:57:35,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1308190875] [2021-11-25 18:57:35,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:57:35,192 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:57:35,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:57:35,193 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:57:35,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-25 18:57:35,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:57:35,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:57:35,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:57:35,323 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 18:57:35,323 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:57:35,324 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:57:35,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1308190875] [2021-11-25 18:57:35,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1308190875] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:57:35,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:57:35,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:57:35,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562116443] [2021-11-25 18:57:35,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:57:35,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:57:35,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:57:35,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:57:35,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:57:35,326 INFO L87 Difference]: Start difference. First operand 1592 states and 1886 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 18:57:35,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:57:35,433 INFO L93 Difference]: Finished difference Result 2936 states and 3493 transitions. [2021-11-25 18:57:35,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:57:35,440 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-25 18:57:35,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:57:35,456 INFO L225 Difference]: With dead ends: 2936 [2021-11-25 18:57:35,457 INFO L226 Difference]: Without dead ends: 2936 [2021-11-25 18:57:35,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 18:57:35,458 INFO L933 BasicCegarLoop]: 1662 mSDtfsCounter, 1143 mSDsluCounter, 1429 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1149 SdHoareTripleChecker+Valid, 3091 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:57:35,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1149 Valid, 3091 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:57:35,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2936 states. [2021-11-25 18:57:35,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2936 to 1593. [2021-11-25 18:57:35,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1593 states, 941 states have (on average 1.9713071200850159) internal successors, (1855), 1584 states have internal predecessors, (1855), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-25 18:57:35,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 1887 transitions. [2021-11-25 18:57:35,506 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 1887 transitions. Word has length 6 [2021-11-25 18:57:35,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:57:35,507 INFO L470 AbstractCegarLoop]: Abstraction has 1593 states and 1887 transitions. [2021-11-25 18:57:35,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 18:57:35,507 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 1887 transitions. [2021-11-25 18:57:35,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 18:57:35,508 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:57:35,508 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:57:35,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:57:35,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:57:35,718 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 749 more)] === [2021-11-25 18:57:35,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:57:35,719 INFO L85 PathProgramCache]: Analyzing trace with hash 334651453, now seen corresponding path program 1 times [2021-11-25 18:57:35,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:57:35,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1539832208] [2021-11-25 18:57:35,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:57:35,720 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:57:35,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:57:35,721 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:57:35,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-25 18:57:35,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:57:35,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:57:35,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:57:35,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:57:35,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:57:35,941 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:57:35,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1539832208] [2021-11-25 18:57:35,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1539832208] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:57:35,942 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:57:35,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:57:35,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49033936] [2021-11-25 18:57:35,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:57:35,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:57:35,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:57:35,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:57:35,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:57:35,946 INFO L87 Difference]: Start difference. First operand 1593 states and 1887 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 18:57:35,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:57:35,989 INFO L93 Difference]: Finished difference Result 1557 states and 1850 transitions. [2021-11-25 18:57:35,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:57:35,989 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 18:57:35,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:57:35,999 INFO L225 Difference]: With dead ends: 1557 [2021-11-25 18:57:36,000 INFO L226 Difference]: Without dead ends: 1557 [2021-11-25 18:57:36,000 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 18:57:36,002 INFO L933 BasicCegarLoop]: 1387 mSDtfsCounter, 1347 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1363 SdHoareTripleChecker+Valid, 1420 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 18:57:36,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1363 Valid, 1420 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:57:36,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1557 states. [2021-11-25 18:57:36,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1557 to 1551. [2021-11-25 18:57:36,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1551 states, 923 states have (on average 1.9631635969664138) internal successors, (1812), 1542 states have internal predecessors, (1812), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-25 18:57:36,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1551 states to 1551 states and 1844 transitions. [2021-11-25 18:57:36,044 INFO L78 Accepts]: Start accepts. Automaton has 1551 states and 1844 transitions. Word has length 11 [2021-11-25 18:57:36,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:57:36,045 INFO L470 AbstractCegarLoop]: Abstraction has 1551 states and 1844 transitions. [2021-11-25 18:57:36,045 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 18:57:36,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1551 states and 1844 transitions. [2021-11-25 18:57:36,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 18:57:36,046 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:57:36,046 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:57:36,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-25 18:57:36,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:57:36,265 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 749 more)] === [2021-11-25 18:57:36,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:57:36,266 INFO L85 PathProgramCache]: Analyzing trace with hash -522505033, now seen corresponding path program 1 times [2021-11-25 18:57:36,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:57:36,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1804615237] [2021-11-25 18:57:36,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:57:36,267 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:57:36,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:57:36,267 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:57:36,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-25 18:57:36,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:57:36,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:57:36,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:57:36,479 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 18:57:36,479 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:57:36,479 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:57:36,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1804615237] [2021-11-25 18:57:36,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1804615237] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:57:36,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:57:36,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:57:36,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501141214] [2021-11-25 18:57:36,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:57:36,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:57:36,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:57:36,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:57:36,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:57:36,481 INFO L87 Difference]: Start difference. First operand 1551 states and 1844 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:57:36,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:57:36,569 INFO L93 Difference]: Finished difference Result 1536 states and 1822 transitions. [2021-11-25 18:57:36,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:57:36,570 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-25 18:57:36,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:57:36,578 INFO L225 Difference]: With dead ends: 1536 [2021-11-25 18:57:36,578 INFO L226 Difference]: Without dead ends: 1536 [2021-11-25 18:57:36,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 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 18:57:36,580 INFO L933 BasicCegarLoop]: 1342 mSDtfsCounter, 1318 mSDsluCounter, 1368 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1334 SdHoareTripleChecker+Valid, 2710 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 18:57:36,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1334 Valid, 2710 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:57:36,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1536 states. [2021-11-25 18:57:36,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1536 to 1529. [2021-11-25 18:57:36,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 915 states have (on average 1.9486338797814207) internal successors, (1783), 1520 states have internal predecessors, (1783), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-25 18:57:36,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 1815 transitions. [2021-11-25 18:57:36,615 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 1815 transitions. Word has length 13 [2021-11-25 18:57:36,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:57:36,616 INFO L470 AbstractCegarLoop]: Abstraction has 1529 states and 1815 transitions. [2021-11-25 18:57:36,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:57:36,616 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 1815 transitions. [2021-11-25 18:57:36,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-25 18:57:36,617 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:57:36,617 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:57:36,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-25 18:57:36,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:57:36,831 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr42REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 749 more)] === [2021-11-25 18:57:36,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:57:36,832 INFO L85 PathProgramCache]: Analyzing trace with hash -22216187, now seen corresponding path program 1 times [2021-11-25 18:57:36,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:57:36,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [387763183] [2021-11-25 18:57:36,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:57:36,832 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:57:36,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:57:36,833 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:57:36,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-25 18:57:37,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:57:37,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 18:57:37,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:57:37,036 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 18:57:37,133 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 18:57:37,133 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:57:37,134 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:57:37,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [387763183] [2021-11-25 18:57:37,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [387763183] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:57:37,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:57:37,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:57:37,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895616374] [2021-11-25 18:57:37,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:57:37,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:57:37,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:57:37,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:57:37,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:57:37,145 INFO L87 Difference]: Start difference. First operand 1529 states and 1815 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:57:41,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:57:41,011 INFO L93 Difference]: Finished difference Result 2173 states and 2457 transitions. [2021-11-25 18:57:41,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:57:41,012 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-25 18:57:41,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:57:41,024 INFO L225 Difference]: With dead ends: 2173 [2021-11-25 18:57:41,024 INFO L226 Difference]: Without dead ends: 2173 [2021-11-25 18:57:41,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 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 18:57:41,025 INFO L933 BasicCegarLoop]: 687 mSDtfsCounter, 2585 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 1395 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2598 SdHoareTripleChecker+Valid, 1340 SdHoareTripleChecker+Invalid, 1456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:57:41,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2598 Valid, 1340 Invalid, 1456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1395 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-11-25 18:57:41,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2173 states. [2021-11-25 18:57:41,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2173 to 1525. [2021-11-25 18:57:41,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1525 states, 915 states have (on average 1.9442622950819672) internal successors, (1779), 1516 states have internal predecessors, (1779), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-25 18:57:41,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1525 states to 1525 states and 1811 transitions. [2021-11-25 18:57:41,063 INFO L78 Accepts]: Start accepts. Automaton has 1525 states and 1811 transitions. Word has length 27 [2021-11-25 18:57:41,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:57:41,064 INFO L470 AbstractCegarLoop]: Abstraction has 1525 states and 1811 transitions. [2021-11-25 18:57:41,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:57:41,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1525 states and 1811 transitions. [2021-11-25 18:57:41,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-25 18:57:41,065 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:57:41,065 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:57:41,076 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-25 18:57:41,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:57:41,277 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr43REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 749 more)] === [2021-11-25 18:57:41,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:57:41,279 INFO L85 PathProgramCache]: Analyzing trace with hash -22216186, now seen corresponding path program 1 times [2021-11-25 18:57:41,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:57:41,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [828448871] [2021-11-25 18:57:41,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:57:41,282 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:57:41,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:57:41,285 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:57:41,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-25 18:57:41,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:57:41,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 18:57:41,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:57:41,485 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 18:57:41,684 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 18:57:41,684 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:57:41,684 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:57:41,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [828448871] [2021-11-25 18:57:41,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [828448871] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:57:41,685 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:57:41,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:57:41,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323175960] [2021-11-25 18:57:41,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:57:41,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:57:41,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:57:41,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:57:41,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:57:41,686 INFO L87 Difference]: Start difference. First operand 1525 states and 1811 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:57:45,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:57:45,547 INFO L93 Difference]: Finished difference Result 1908 states and 2095 transitions. [2021-11-25 18:57:45,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:57:45,548 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-25 18:57:45,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:57:45,558 INFO L225 Difference]: With dead ends: 1908 [2021-11-25 18:57:45,558 INFO L226 Difference]: Without dead ends: 1908 [2021-11-25 18:57:45,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 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 18:57:45,559 INFO L933 BasicCegarLoop]: 1070 mSDtfsCounter, 1061 mSDsluCounter, 1184 mSDsCounter, 0 mSdLazyCounter, 1642 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1071 SdHoareTripleChecker+Valid, 2254 SdHoareTripleChecker+Invalid, 1646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:57:45,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1071 Valid, 2254 Invalid, 1646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1642 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-11-25 18:57:45,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1908 states. [2021-11-25 18:57:45,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1908 to 1521. [2021-11-25 18:57:45,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 915 states have (on average 1.9398907103825136) internal successors, (1775), 1512 states have internal predecessors, (1775), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-25 18:57:45,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 1807 transitions. [2021-11-25 18:57:45,613 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 1807 transitions. Word has length 27 [2021-11-25 18:57:45,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:57:45,614 INFO L470 AbstractCegarLoop]: Abstraction has 1521 states and 1807 transitions. [2021-11-25 18:57:45,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:57:45,614 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 1807 transitions. [2021-11-25 18:57:45,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-25 18:57:45,615 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:57:45,616 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:57:45,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-25 18:57:45,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:57:45,828 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr108REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 749 more)] === [2021-11-25 18:57:45,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:57:45,828 INFO L85 PathProgramCache]: Analyzing trace with hash 810363537, now seen corresponding path program 1 times [2021-11-25 18:57:45,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:57:45,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1860478520] [2021-11-25 18:57:45,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:57:45,830 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:57:45,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:57:45,830 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:57:45,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-25 18:57:46,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:57:46,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:57:46,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:57:46,152 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 18:57:46,152 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:57:46,152 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:57:46,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1860478520] [2021-11-25 18:57:46,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1860478520] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:57:46,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:57:46,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:57:46,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098680906] [2021-11-25 18:57:46,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:57:46,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:57:46,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:57:46,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:57:46,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:57:46,154 INFO L87 Difference]: Start difference. First operand 1521 states and 1807 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:57:46,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:57:46,196 INFO L93 Difference]: Finished difference Result 1521 states and 1803 transitions. [2021-11-25 18:57:46,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:57:46,197 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-25 18:57:46,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:57:46,204 INFO L225 Difference]: With dead ends: 1521 [2021-11-25 18:57:46,204 INFO L226 Difference]: Without dead ends: 1521 [2021-11-25 18:57:46,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 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 18:57:46,205 INFO L933 BasicCegarLoop]: 1336 mSDtfsCounter, 1294 mSDsluCounter, 1352 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1310 SdHoareTripleChecker+Valid, 2688 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 18:57:46,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1310 Valid, 2688 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:57:46,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1521 states. [2021-11-25 18:57:46,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1521 to 1515. [2021-11-25 18:57:46,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1515 states, 909 states have (on average 1.9416941694169416) internal successors, (1765), 1506 states have internal predecessors, (1765), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-25 18:57:46,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1515 states to 1515 states and 1797 transitions. [2021-11-25 18:57:46,237 INFO L78 Accepts]: Start accepts. Automaton has 1515 states and 1797 transitions. Word has length 42 [2021-11-25 18:57:46,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:57:46,238 INFO L470 AbstractCegarLoop]: Abstraction has 1515 states and 1797 transitions. [2021-11-25 18:57:46,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:57:46,238 INFO L276 IsEmpty]: Start isEmpty. Operand 1515 states and 1797 transitions. [2021-11-25 18:57:46,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-25 18:57:46,240 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:57:46,240 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:57:46,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-25 18:57:46,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:57:46,453 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr108REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 749 more)] === [2021-11-25 18:57:46,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:57:46,455 INFO L85 PathProgramCache]: Analyzing trace with hash 2087041861, now seen corresponding path program 1 times [2021-11-25 18:57:46,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:57:46,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1041587862] [2021-11-25 18:57:46,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:57:46,457 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:57:46,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:57:46,460 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:57:46,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-25 18:57:46,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:57:46,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:57:46,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:57:47,032 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 18:57:47,032 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:57:47,032 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:57:47,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1041587862] [2021-11-25 18:57:47,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1041587862] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:57:47,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:57:47,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:57:47,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512849949] [2021-11-25 18:57:47,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:57:47,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:57:47,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:57:47,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:57:47,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:57:47,035 INFO L87 Difference]: Start difference. First operand 1515 states and 1797 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:57:47,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:57:47,278 INFO L93 Difference]: Finished difference Result 1756 states and 2047 transitions. [2021-11-25 18:57:47,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:57:47,279 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-25 18:57:47,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:57:47,290 INFO L225 Difference]: With dead ends: 1756 [2021-11-25 18:57:47,290 INFO L226 Difference]: Without dead ends: 1756 [2021-11-25 18:57:47,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 48 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 18:57:47,292 INFO L933 BasicCegarLoop]: 1415 mSDtfsCounter, 269 mSDsluCounter, 1211 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 2626 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:57:47,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 2626 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:57:47,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1756 states. [2021-11-25 18:57:47,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1756 to 1561. [2021-11-25 18:57:47,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1561 states, 955 states have (on average 1.8963350785340314) internal successors, (1811), 1552 states have internal predecessors, (1811), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-25 18:57:47,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 1843 transitions. [2021-11-25 18:57:47,328 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 1843 transitions. Word has length 50 [2021-11-25 18:57:47,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:57:47,329 INFO L470 AbstractCegarLoop]: Abstraction has 1561 states and 1843 transitions. [2021-11-25 18:57:47,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:57:47,329 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 1843 transitions. [2021-11-25 18:57:47,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-25 18:57:47,335 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:57:47,335 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:57:47,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-25 18:57:47,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:57:47,549 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 749 more)] === [2021-11-25 18:57:47,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:57:47,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1009990608, now seen corresponding path program 1 times [2021-11-25 18:57:47,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:57:47,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [427860776] [2021-11-25 18:57:47,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:57:47,555 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:57:47,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:57:47,559 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:57:47,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-25 18:57:47,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:57:47,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 18:57:47,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:57:47,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:57:47,956 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 18:57:48,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:48,474 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 18:57:48,485 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:57:48,485 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 15 treesize of output 15 [2021-11-25 18:57:48,502 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 18:57:48,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:57:48,503 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:57:48,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [427860776] [2021-11-25 18:57:48,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [427860776] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:57:48,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:57:48,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:57:48,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380815378] [2021-11-25 18:57:48,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:57:48,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:57:48,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:57:48,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:57:48,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:57:48,505 INFO L87 Difference]: Start difference. First operand 1561 states and 1843 transitions. Second operand has 4 states, 3 states have (on average 17.666666666666668) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:57:51,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:57:51,100 INFO L93 Difference]: Finished difference Result 1530 states and 1766 transitions. [2021-11-25 18:57:51,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:57:51,101 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 17.666666666666668) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-25 18:57:51,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:57:51,109 INFO L225 Difference]: With dead ends: 1530 [2021-11-25 18:57:51,109 INFO L226 Difference]: Without dead ends: 1530 [2021-11-25 18:57:51,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:57:51,110 INFO L933 BasicCegarLoop]: 562 mSDtfsCounter, 2001 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2007 SdHoareTripleChecker+Valid, 790 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:57:51,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2007 Valid, 790 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-25 18:57:51,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1530 states. [2021-11-25 18:57:51,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1530 to 1311. [2021-11-25 18:57:51,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1311 states, 789 states have (on average 1.7870722433460076) internal successors, (1410), 1302 states have internal predecessors, (1410), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-25 18:57:51,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1311 states to 1311 states and 1442 transitions. [2021-11-25 18:57:51,142 INFO L78 Accepts]: Start accepts. Automaton has 1311 states and 1442 transitions. Word has length 53 [2021-11-25 18:57:51,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:57:51,143 INFO L470 AbstractCegarLoop]: Abstraction has 1311 states and 1442 transitions. [2021-11-25 18:57:51,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 17.666666666666668) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:57:51,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1311 states and 1442 transitions. [2021-11-25 18:57:51,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-25 18:57:51,146 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:57:51,146 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:57:51,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-25 18:57:51,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:57:51,360 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr66REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 749 more)] === [2021-11-25 18:57:51,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:57:51,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1993678057, now seen corresponding path program 1 times [2021-11-25 18:57:51,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:57:51,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [541947993] [2021-11-25 18:57:51,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:57:51,362 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:57:51,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:57:51,364 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:57:51,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-25 18:57:51,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:57:51,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:57:51,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:57:51,707 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 18:57:51,735 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 18:57:51,766 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 27 treesize of output 15 [2021-11-25 18:57:51,777 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 18:57:51,777 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:57:51,777 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:57:51,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [541947993] [2021-11-25 18:57:51,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [541947993] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:57:51,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:57:51,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:57:51,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887349421] [2021-11-25 18:57:51,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:57:51,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:57:51,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:57:51,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:57:51,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:57:51,780 INFO L87 Difference]: Start difference. First operand 1311 states and 1442 transitions. Second operand has 5 states, 4 states have (on average 14.5) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:57:54,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:57:54,494 INFO L93 Difference]: Finished difference Result 1310 states and 1441 transitions. [2021-11-25 18:57:54,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:57:54,495 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 14.5) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-25 18:57:54,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:57:54,501 INFO L225 Difference]: With dead ends: 1310 [2021-11-25 18:57:54,501 INFO L226 Difference]: Without dead ends: 1310 [2021-11-25 18:57:54,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 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 18:57:54,502 INFO L933 BasicCegarLoop]: 1256 mSDtfsCounter, 4 mSDsluCounter, 1918 mSDsCounter, 0 mSdLazyCounter, 1855 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 3174 SdHoareTripleChecker+Invalid, 1856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:57:54,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 3174 Invalid, 1856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1855 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-25 18:57:54,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2021-11-25 18:57:54,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 1310. [2021-11-25 18:57:54,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1310 states, 789 states have (on average 1.785804816223067) internal successors, (1409), 1301 states have internal predecessors, (1409), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-25 18:57:54,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 1441 transitions. [2021-11-25 18:57:54,527 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 1441 transitions. Word has length 58 [2021-11-25 18:57:54,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:57:54,528 INFO L470 AbstractCegarLoop]: Abstraction has 1310 states and 1441 transitions. [2021-11-25 18:57:54,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 14.5) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:57:54,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 1441 transitions. [2021-11-25 18:57:54,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-25 18:57:54,529 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:57:54,529 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:57:54,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-25 18:57:54,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:57:54,743 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr67REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 749 more)] === [2021-11-25 18:57:54,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:57:54,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1993678056, now seen corresponding path program 1 times [2021-11-25 18:57:54,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:57:54,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [946771436] [2021-11-25 18:57:54,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:57:54,747 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:57:54,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:57:54,750 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:57:54,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-25 18:57:55,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:57:55,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 18:57:55,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:57:55,139 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 18:57:55,163 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 18:57:55,171 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 18:57:55,215 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 18:57:55,220 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 18:57:55,237 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 18:57:55,237 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:57:55,237 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:57:55,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [946771436] [2021-11-25 18:57:55,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [946771436] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:57:55,238 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:57:55,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:57:55,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867345010] [2021-11-25 18:57:55,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:57:55,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:57:55,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:57:55,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:57:55,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:57:55,240 INFO L87 Difference]: Start difference. First operand 1310 states and 1441 transitions. Second operand has 5 states, 4 states have (on average 14.5) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:57:58,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:57:58,671 INFO L93 Difference]: Finished difference Result 1309 states and 1440 transitions. [2021-11-25 18:57:58,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:57:58,672 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 14.5) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-25 18:57:58,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:57:58,678 INFO L225 Difference]: With dead ends: 1309 [2021-11-25 18:57:58,678 INFO L226 Difference]: Without dead ends: 1309 [2021-11-25 18:57:58,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 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 18:57:58,679 INFO L933 BasicCegarLoop]: 1256 mSDtfsCounter, 2 mSDsluCounter, 1957 mSDsCounter, 0 mSdLazyCounter, 1814 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3213 SdHoareTripleChecker+Invalid, 1815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:57:58,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3213 Invalid, 1815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1814 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-25 18:57:58,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1309 states. [2021-11-25 18:57:58,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1309 to 1309. [2021-11-25 18:57:58,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1309 states, 788 states have (on average 1.7868020304568528) internal successors, (1408), 1300 states have internal predecessors, (1408), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-25 18:57:58,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 1440 transitions. [2021-11-25 18:57:58,705 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 1440 transitions. Word has length 58 [2021-11-25 18:57:58,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:57:58,706 INFO L470 AbstractCegarLoop]: Abstraction has 1309 states and 1440 transitions. [2021-11-25 18:57:58,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 14.5) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:57:58,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 1440 transitions. [2021-11-25 18:57:58,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-25 18:57:58,707 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:57:58,707 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:57:58,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-25 18:57:58,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:57:58,921 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 749 more)] === [2021-11-25 18:57:58,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:57:58,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1427434238, now seen corresponding path program 1 times [2021-11-25 18:57:58,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:57:58,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [785607359] [2021-11-25 18:57:58,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:57:58,928 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:57:58,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:57:58,932 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:57:58,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-25 18:57:59,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:57:59,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:57:59,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:57:59,314 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 18:57:59,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:57:59,314 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:57:59,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [785607359] [2021-11-25 18:57:59,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [785607359] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:57:59,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:57:59,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:57:59,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812982516] [2021-11-25 18:57:59,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:57:59,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:57:59,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:57:59,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:57:59,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:57:59,317 INFO L87 Difference]: Start difference. First operand 1309 states and 1440 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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 18:57:59,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:57:59,378 INFO L93 Difference]: Finished difference Result 1312 states and 1445 transitions. [2021-11-25 18:57:59,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:57:59,379 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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 66 [2021-11-25 18:57:59,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:57:59,386 INFO L225 Difference]: With dead ends: 1312 [2021-11-25 18:57:59,390 INFO L226 Difference]: Without dead ends: 1312 [2021-11-25 18:57:59,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 63 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 18:57:59,390 INFO L933 BasicCegarLoop]: 1255 mSDtfsCounter, 2 mSDsluCounter, 2502 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3757 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:57:59,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3757 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:57:59,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1312 states. [2021-11-25 18:57:59,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1312 to 1312. [2021-11-25 18:57:59,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1312 states, 790 states have (on average 1.7860759493670886) internal successors, (1411), 1303 states have internal predecessors, (1411), 16 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (18), 7 states have call predecessors, (18), 16 states have call successors, (18) [2021-11-25 18:57:59,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 1445 transitions. [2021-11-25 18:57:59,418 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 1445 transitions. Word has length 66 [2021-11-25 18:57:59,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:57:59,419 INFO L470 AbstractCegarLoop]: Abstraction has 1312 states and 1445 transitions. [2021-11-25 18:57:59,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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 18:57:59,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 1445 transitions. [2021-11-25 18:57:59,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-25 18:57:59,420 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:57:59,420 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] [2021-11-25 18:57:59,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-25 18:57:59,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:57:59,634 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 749 more)] === [2021-11-25 18:57:59,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:57:59,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1840539799, now seen corresponding path program 1 times [2021-11-25 18:57:59,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:57:59,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1126906569] [2021-11-25 18:57:59,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:57:59,640 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:57:59,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:57:59,647 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:57:59,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-25 18:57:59,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:57:59,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 18:57:59,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:58:00,077 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 18:58:00,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:58:00,221 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 18:58:00,221 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:58:00,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1126906569] [2021-11-25 18:58:00,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1126906569] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:58:00,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [653800365] [2021-11-25 18:58:00,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:58:00,222 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:58:00,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:58:00,224 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:58:00,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-25 18:58:00,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:58:00,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 18:58:00,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:58:00,728 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 18:58:00,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:58:00,840 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 18:58:00,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [653800365] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:58:00,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604178000] [2021-11-25 18:58:00,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:58:00,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:58:00,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:58:00,846 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:58:00,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-25 18:58:01,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:58:01,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 18:58:01,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:58:01,232 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 18:58:01,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:58:01,366 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 18:58:01,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604178000] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:58:01,366 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 18:58:01,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-25 18:58:01,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8530660] [2021-11-25 18:58:01,367 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 18:58:01,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 18:58:01,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:58:01,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 18:58:01,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:58:01,368 INFO L87 Difference]: Start difference. First operand 1312 states and 1445 transitions. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 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 18:58:01,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:58:01,579 INFO L93 Difference]: Finished difference Result 1324 states and 1463 transitions. [2021-11-25 18:58:01,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 18:58:01,579 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 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 67 [2021-11-25 18:58:01,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:58:01,587 INFO L225 Difference]: With dead ends: 1324 [2021-11-25 18:58:01,587 INFO L226 Difference]: Without dead ends: 1324 [2021-11-25 18:58:01,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 390 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 18:58:01,588 INFO L933 BasicCegarLoop]: 1255 mSDtfsCounter, 12 mSDsluCounter, 7487 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 8742 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:58:01,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 8742 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:58:01,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2021-11-25 18:58:01,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 1322. [2021-11-25 18:58:01,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1322 states, 799 states have (on average 1.7847309136420526) internal successors, (1426), 1312 states have internal predecessors, (1426), 16 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (18), 7 states have call predecessors, (18), 16 states have call successors, (18) [2021-11-25 18:58:01,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 1460 transitions. [2021-11-25 18:58:01,615 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 1460 transitions. Word has length 67 [2021-11-25 18:58:01,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:58:01,616 INFO L470 AbstractCegarLoop]: Abstraction has 1322 states and 1460 transitions. [2021-11-25 18:58:01,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 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 18:58:01,616 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 1460 transitions. [2021-11-25 18:58:01,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-25 18:58:01,617 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:58:01,617 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] [2021-11-25 18:58:01,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-25 18:58:01,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-25 18:58:02,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-25 18:58:02,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 18:58:02,244 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 749 more)] === [2021-11-25 18:58:02,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:58:02,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1070860606, now seen corresponding path program 2 times [2021-11-25 18:58:02,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:58:02,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [665095811] [2021-11-25 18:58:02,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 18:58:02,248 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:58:02,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:58:02,251 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:58:02,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-25 18:58:02,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 18:58:02,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:58:02,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:58:02,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:58:02,843 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 18:58:02,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:58:03,095 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 18:58:03,096 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:58:03,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [665095811] [2021-11-25 18:58:03,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [665095811] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:58:03,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [480976725] [2021-11-25 18:58:03,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 18:58:03,096 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:58:03,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:58:03,097 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:58:03,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-25 18:58:04,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 18:58:04,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:58:04,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:58:04,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:58:04,167 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 18:58:04,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:58:04,322 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 18:58:04,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [480976725] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:58:04,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648163526] [2021-11-25 18:58:04,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 18:58:04,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:58:04,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:58:04,324 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:58:04,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-25 18:58:14,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 18:58:14,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:58:14,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 18:58:14,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:58:14,472 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 18:58:14,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:58:14,770 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 18:58:14,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648163526] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:58:14,770 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 18:58:14,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 20 [2021-11-25 18:58:14,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554749312] [2021-11-25 18:58:14,773 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 18:58:14,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-25 18:58:14,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:58:14,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-25 18:58:14,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2021-11-25 18:58:14,774 INFO L87 Difference]: Start difference. First operand 1322 states and 1460 transitions. Second operand has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 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 18:58:15,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:58:15,589 INFO L93 Difference]: Finished difference Result 1343 states and 1490 transitions. [2021-11-25 18:58:15,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-25 18:58:15,589 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 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 70 [2021-11-25 18:58:15,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:58:15,595 INFO L225 Difference]: With dead ends: 1343 [2021-11-25 18:58:15,595 INFO L226 Difference]: Without dead ends: 1337 [2021-11-25 18:58:15,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=416, Invalid=774, Unknown=0, NotChecked=0, Total=1190 [2021-11-25 18:58:15,596 INFO L933 BasicCegarLoop]: 1256 mSDtfsCounter, 56 mSDsluCounter, 13726 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 14982 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:58:15,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 14982 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 18:58:15,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1337 states. [2021-11-25 18:58:15,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1337 to 1331. [2021-11-25 18:58:15,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1331 states, 808 states have (on average 1.7784653465346534) internal successors, (1437), 1321 states have internal predecessors, (1437), 16 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (18), 7 states have call predecessors, (18), 16 states have call successors, (18) [2021-11-25 18:58:15,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 1471 transitions. [2021-11-25 18:58:15,622 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 1471 transitions. Word has length 70 [2021-11-25 18:58:15,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:58:15,623 INFO L470 AbstractCegarLoop]: Abstraction has 1331 states and 1471 transitions. [2021-11-25 18:58:15,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 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 18:58:15,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 1471 transitions. [2021-11-25 18:58:15,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-25 18:58:15,624 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:58:15,624 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:58:15,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-25 18:58:15,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-25 18:58:16,052 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2021-11-25 18:58:16,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 18:58:16,240 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 749 more)] === [2021-11-25 18:58:16,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:58:16,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1953798814, now seen corresponding path program 3 times [2021-11-25 18:58:16,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:58:16,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1098365682] [2021-11-25 18:58:16,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:58:16,244 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:58:16,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:58:16,247 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:58:16,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-25 18:58:16,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-25 18:58:16,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:58:16,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 18:58:16,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:58:17,104 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:58:17,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:58:17,833 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:58:17,834 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:58:17,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1098365682] [2021-11-25 18:58:17,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1098365682] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:58:17,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [749286997] [2021-11-25 18:58:17,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:58:17,835 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:58:17,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:58:17,840 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:58:17,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-25 18:58:20,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-25 18:58:20,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:58:20,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 18:58:20,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:58:20,945 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:58:20,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:58:21,261 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:58:21,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [749286997] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:58:21,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777897201] [2021-11-25 18:58:21,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:58:21,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:58:21,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:58:21,263 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:58:21,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3287f65-aa8d-4726-8aac-99c5b4ba252f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process