./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH --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 85fe539c4a9811cd5d49f239f4680cc0b3752a2958e9f287c34e302b923af4f9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:27:35,929 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:27:35,931 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:27:35,960 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:27:35,960 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:27:35,961 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:27:35,963 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:27:35,965 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:27:35,967 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:27:35,968 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:27:35,969 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:27:35,971 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:27:35,971 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:27:35,973 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:27:35,974 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:27:35,975 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:27:35,976 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:27:35,977 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:27:35,979 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:27:35,982 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:27:35,983 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:27:35,985 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:27:35,986 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:27:35,987 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:27:35,991 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:27:35,991 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:27:35,991 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:27:35,992 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:27:35,993 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:27:35,994 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:27:35,994 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:27:35,995 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:27:35,996 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:27:35,997 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:27:35,998 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:27:35,999 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:27:36,000 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:27:36,000 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:27:36,000 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:27:36,001 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:27:36,002 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:27:36,003 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-03 04:27:36,027 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:27:36,027 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:27:36,028 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:27:36,028 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:27:36,028 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:27:36,028 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:27:36,029 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:27:36,029 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:27:36,029 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:27:36,029 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:27:36,030 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:27:36,030 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:27:36,030 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:27:36,030 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:27:36,031 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:27:36,031 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 04:27:36,031 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 04:27:36,032 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:27:36,032 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:27:36,032 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 04:27:36,033 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:27:36,033 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:27:36,033 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:27:36,033 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 04:27:36,033 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 04:27:36,034 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 04:27:36,034 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:27:36,034 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:27:36,034 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:27:36,035 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:27:36,035 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:27:36,035 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:27:36,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:27:36,036 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:27:36,036 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:27:36,036 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:27:36,036 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:27:36,037 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:27:36,037 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:27:36,037 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_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 85fe539c4a9811cd5d49f239f4680cc0b3752a2958e9f287c34e302b923af4f9 [2021-11-03 04:27:36,335 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:27:36,360 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:27:36,363 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:27:36,364 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:27:36,365 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:27:36,366 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-1.i [2021-11-03 04:27:36,438 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/data/94d58a47d/8c808fb2c6324898838fc5158aedcfc3/FLAG45b525d2e [2021-11-03 04:27:37,064 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:27:37,064 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-1.i [2021-11-03 04:27:37,083 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/data/94d58a47d/8c808fb2c6324898838fc5158aedcfc3/FLAG45b525d2e [2021-11-03 04:27:37,274 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/data/94d58a47d/8c808fb2c6324898838fc5158aedcfc3 [2021-11-03 04:27:37,277 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:27:37,279 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:27:37,304 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:27:37,305 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:27:37,308 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:27:37,309 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:27:37" (1/1) ... [2021-11-03 04:27:37,310 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10a13524 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:27:37, skipping insertion in model container [2021-11-03 04:27:37,310 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:27:37" (1/1) ... [2021-11-03 04:27:37,317 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:27:37,406 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:27:37,968 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-1.i[33022,33035] [2021-11-03 04:27:38,252 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:27:38,264 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) [2021-11-03 04:27:38,265 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1e33f471 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:27:38, skipping insertion in model container [2021-11-03 04:27:38,265 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:27:38,266 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 04:27:38,268 INFO L168 Benchmark]: Toolchain (without parser) took 987.05 ms. Allocated memory is still 96.5 MB. Free memory was 52.6 MB in the beginning and 53.1 MB in the end (delta: -468.2 kB). Peak memory consumption was 743.1 kB. Max. memory is 16.1 GB. [2021-11-03 04:27:38,269 INFO L168 Benchmark]: CDTParser took 0.73 ms. Allocated memory is still 96.5 MB. Free memory was 72.2 MB in the beginning and 72.2 MB in the end (delta: 51.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:27:38,271 INFO L168 Benchmark]: CACSL2BoogieTranslator took 961.32 ms. Allocated memory is still 96.5 MB. Free memory was 74.5 MB in the beginning and 53.1 MB in the end (delta: 21.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-11-03 04:27:38,273 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.73 ms. Allocated memory is still 96.5 MB. Free memory was 72.2 MB in the beginning and 72.2 MB in the end (delta: 51.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 961.32 ms. Allocated memory is still 96.5 MB. Free memory was 74.5 MB in the beginning and 53.1 MB in the end (delta: 21.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 734]: 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_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH --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 85fe539c4a9811cd5d49f239f4680cc0b3752a2958e9f287c34e302b923af4f9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:27:40,434 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:27:40,437 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:27:40,470 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:27:40,471 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:27:40,472 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:27:40,474 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:27:40,476 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:27:40,478 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:27:40,479 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:27:40,480 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:27:40,481 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:27:40,482 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:27:40,483 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:27:40,485 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:27:40,486 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:27:40,487 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:27:40,488 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:27:40,490 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:27:40,493 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:27:40,494 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:27:40,496 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:27:40,500 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:27:40,501 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:27:40,505 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:27:40,511 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:27:40,512 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:27:40,513 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:27:40,513 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:27:40,517 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:27:40,518 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:27:40,519 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:27:40,519 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:27:40,521 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:27:40,522 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:27:40,523 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:27:40,524 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:27:40,525 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:27:40,525 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:27:40,526 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:27:40,527 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:27:40,529 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-03 04:27:40,575 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:27:40,576 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:27:40,577 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:27:40,577 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:27:40,578 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:27:40,578 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:27:40,578 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:27:40,578 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:27:40,579 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:27:40,580 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 04:27:40,581 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 04:27:40,582 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:27:40,582 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:27:40,582 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 04:27:40,582 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:27:40,582 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:27:40,583 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:27:40,583 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 04:27:40,583 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 04:27:40,583 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 04:27:40,584 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:27:40,584 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:27:40,584 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 04:27:40,584 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 04:27:40,584 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:27:40,585 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:27:40,585 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:27:40,585 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 04:27:40,585 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:27:40,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:27:40,586 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:27:40,586 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:27:40,586 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 04:27:40,587 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 04:27:40,587 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:27:40,587 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:27:40,587 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_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 85fe539c4a9811cd5d49f239f4680cc0b3752a2958e9f287c34e302b923af4f9 [2021-11-03 04:27:40,946 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:27:40,974 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:27:40,976 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:27:40,976 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:27:40,977 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:27:40,978 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-1.i [2021-11-03 04:27:41,032 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/data/00ab845e7/aedfbe870b1240ebae219f51c8af4ca4/FLAG5f8616e21 [2021-11-03 04:27:41,710 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:27:41,711 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-1.i [2021-11-03 04:27:41,742 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/data/00ab845e7/aedfbe870b1240ebae219f51c8af4ca4/FLAG5f8616e21 [2021-11-03 04:27:41,905 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/data/00ab845e7/aedfbe870b1240ebae219f51c8af4ca4 [2021-11-03 04:27:41,908 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:27:41,909 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:27:41,911 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:27:41,911 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:27:41,914 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:27:41,915 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:27:41" (1/1) ... [2021-11-03 04:27:41,916 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c8e3a47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:27:41, skipping insertion in model container [2021-11-03 04:27:41,916 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:27:41" (1/1) ... [2021-11-03 04:27:41,922 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:27:41,988 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:27:42,488 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-1.i[33022,33035] [2021-11-03 04:27:42,782 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:27:42,794 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 04:27:42,818 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:27:42,837 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-1.i[33022,33035] [2021-11-03 04:27:43,003 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:27:43,014 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:27:43,053 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-1.i[33022,33035] [2021-11-03 04:27:43,145 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:27:43,183 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:27:43,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:27:43 WrapperNode [2021-11-03 04:27:43,183 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:27:43,185 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:27:43,185 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:27:43,185 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:27:43,191 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:27:43" (1/1) ... [2021-11-03 04:27:43,239 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:27:43" (1/1) ... [2021-11-03 04:27:43,388 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:27:43,389 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:27:43,389 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:27:43,390 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:27:43,398 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:27:43" (1/1) ... [2021-11-03 04:27:43,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:27:43" (1/1) ... [2021-11-03 04:27:43,422 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:27:43" (1/1) ... [2021-11-03 04:27:43,422 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:27:43" (1/1) ... [2021-11-03 04:27:43,521 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:27:43" (1/1) ... [2021-11-03 04:27:43,556 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:27:43" (1/1) ... [2021-11-03 04:27:43,564 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:27:43" (1/1) ... [2021-11-03 04:27:43,581 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:27:43,582 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:27:43,582 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:27:43,582 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:27:43,583 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:27:43" (1/1) ... [2021-11-03 04:27:43,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:27:43,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:27:43,622 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:27:43,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:27:43,663 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-03 04:27:43,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 04:27:43,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 04:27:43,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 04:27:43,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:27:43,664 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-03 04:27:43,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 04:27:43,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 04:27:43,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 04:27:43,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 04:27:43,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:27:43,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:27:53,009 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:27:53,010 INFO L299 CfgBuilder]: Removed 207 assume(true) statements. [2021-11-03 04:27:53,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:27:53 BoogieIcfgContainer [2021-11-03 04:27:53,015 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:27:53,017 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:27:53,017 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:27:53,020 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:27:53,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:27:41" (1/3) ... [2021-11-03 04:27:53,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f2a7a83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:27:53, skipping insertion in model container [2021-11-03 04:27:53,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:27:43" (2/3) ... [2021-11-03 04:27:53,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f2a7a83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:27:53, skipping insertion in model container [2021-11-03 04:27:53,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:27:53" (3/3) ... [2021-11-03 04:27:53,024 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SFH_test10-1.i [2021-11-03 04:27:53,030 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:27:53,031 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1005 error locations. [2021-11-03 04:27:53,086 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:27:53,103 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 [2021-11-03 04:27:53,107 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1005 error locations. [2021-11-03 04:27:53,172 INFO L276 IsEmpty]: Start isEmpty. Operand has 2123 states, 1117 states have (on average 2.188003581020591) internal successors, (2444), 2122 states have internal predecessors, (2444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:53,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-03 04:27:53,178 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:27:53,178 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-03 04:27:53,179 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-03 04:27:53,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:27:53,185 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-11-03 04:27:53,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:27:53,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1146527460] [2021-11-03 04:27:53,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:27:53,198 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:27:53,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:27:53,206 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:27:53,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 04:27:53,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:27:53,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:27:53,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:53,531 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 [2021-11-03 04:27:53,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:53,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:53,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:53,574 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:27:53,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1146527460] [2021-11-03 04:27:53,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1146527460] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:27:53,575 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:27:53,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:27:53,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326197665] [2021-11-03 04:27:53,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:27:53,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:27:53,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:27:53,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:27:53,620 INFO L87 Difference]: Start difference. First operand has 2123 states, 1117 states have (on average 2.188003581020591) internal successors, (2444), 2122 states have internal predecessors, (2444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:57,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:27:57,672 INFO L93 Difference]: Finished difference Result 2630 states and 2802 transitions. [2021-11-03 04:27:57,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:27:57,673 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-03 04:27:57,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:27:57,716 INFO L225 Difference]: With dead ends: 2630 [2021-11-03 04:27:57,717 INFO L226 Difference]: Without dead ends: 2628 [2021-11-03 04:27:57,718 INFO L786 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 [2021-11-03 04:27:57,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2628 states. [2021-11-03 04:27:57,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2628 to 2271. [2021-11-03 04:27:57,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2271 states, 1289 states have (on average 2.017843289371606) internal successors, (2601), 2270 states have internal predecessors, (2601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:57,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2271 states to 2271 states and 2601 transitions. [2021-11-03 04:27:57,863 INFO L78 Accepts]: Start accepts. Automaton has 2271 states and 2601 transitions. Word has length 3 [2021-11-03 04:27:57,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:27:57,864 INFO L470 AbstractCegarLoop]: Abstraction has 2271 states and 2601 transitions. [2021-11-03 04:27:57,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:57,864 INFO L276 IsEmpty]: Start isEmpty. Operand 2271 states and 2601 transitions. [2021-11-03 04:27:57,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-03 04:27:57,865 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:27:57,865 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-03 04:27:57,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 04:27:58,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:27:58,080 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-03 04:27:58,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:27:58,080 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-11-03 04:27:58,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:27:58,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [452395046] [2021-11-03 04:27:58,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:27:58,082 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:27:58,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:27:58,083 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:27:58,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 04:27:58,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:27:58,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:27:58,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:58,293 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 [2021-11-03 04:27:58,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:58,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:58,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:58,368 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:27:58,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [452395046] [2021-11-03 04:27:58,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [452395046] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:27:58,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:27:58,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 04:27:58,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855963582] [2021-11-03 04:27:58,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:27:58,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:27:58,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:27:58,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:27:58,378 INFO L87 Difference]: Start difference. First operand 2271 states and 2601 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:08,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:28:08,259 INFO L93 Difference]: Finished difference Result 3440 states and 3882 transitions. [2021-11-03 04:28:08,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:28:08,260 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-03 04:28:08,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:28:08,282 INFO L225 Difference]: With dead ends: 3440 [2021-11-03 04:28:08,282 INFO L226 Difference]: Without dead ends: 3440 [2021-11-03 04:28:08,283 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:28:08,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3440 states. [2021-11-03 04:28:08,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3440 to 2435. [2021-11-03 04:28:08,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2435 states, 1465 states have (on average 2.0088737201365188) internal successors, (2943), 2434 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:08,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2435 states to 2435 states and 2943 transitions. [2021-11-03 04:28:08,347 INFO L78 Accepts]: Start accepts. Automaton has 2435 states and 2943 transitions. Word has length 3 [2021-11-03 04:28:08,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:28:08,347 INFO L470 AbstractCegarLoop]: Abstraction has 2435 states and 2943 transitions. [2021-11-03 04:28:08,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:08,348 INFO L276 IsEmpty]: Start isEmpty. Operand 2435 states and 2943 transitions. [2021-11-03 04:28:08,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 04:28:08,348 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:28:08,348 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:28:08,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 04:28:08,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:28:08,560 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-03 04:28:08,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:28:08,561 INFO L85 PathProgramCache]: Analyzing trace with hash 62249618, now seen corresponding path program 1 times [2021-11-03 04:28:08,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:28:08,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1257528006] [2021-11-03 04:28:08,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:28:08,562 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:28:08,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:28:08,563 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:28:08,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 04:28:08,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:28:08,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:28:08,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:28:08,757 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 [2021-11-03 04:28:08,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:08,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:28:08,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:08,805 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:28:08,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1257528006] [2021-11-03 04:28:08,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1257528006] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:28:08,809 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:28:08,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:28:08,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200683004] [2021-11-03 04:28:08,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:28:08,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:28:08,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:28:08,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:28:08,812 INFO L87 Difference]: Start difference. First operand 2435 states and 2943 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:12,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:28:12,223 INFO L93 Difference]: Finished difference Result 3241 states and 3761 transitions. [2021-11-03 04:28:12,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:28:12,227 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-03 04:28:12,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:28:12,243 INFO L225 Difference]: With dead ends: 3241 [2021-11-03 04:28:12,243 INFO L226 Difference]: Without dead ends: 3241 [2021-11-03 04:28:12,243 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:28:12,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3241 states. [2021-11-03 04:28:12,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3241 to 2344. [2021-11-03 04:28:12,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2344 states, 1465 states have (on average 1.9235494880546076) internal successors, (2818), 2343 states have internal predecessors, (2818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:12,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 2818 transitions. [2021-11-03 04:28:12,302 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 2818 transitions. Word has length 8 [2021-11-03 04:28:12,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:28:12,302 INFO L470 AbstractCegarLoop]: Abstraction has 2344 states and 2818 transitions. [2021-11-03 04:28:12,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:12,303 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 2818 transitions. [2021-11-03 04:28:12,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 04:28:12,303 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:28:12,304 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:28:12,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 04:28:12,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:28:12,525 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-03 04:28:12,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:28:12,526 INFO L85 PathProgramCache]: Analyzing trace with hash 62249619, now seen corresponding path program 1 times [2021-11-03 04:28:12,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:28:12,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1907664073] [2021-11-03 04:28:12,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:28:12,527 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:28:12,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:28:12,528 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:28:12,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 04:28:12,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:28:12,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:28:12,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:28:12,743 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 [2021-11-03 04:28:12,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:12,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:28:12,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:12,881 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:28:12,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1907664073] [2021-11-03 04:28:12,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1907664073] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:28:12,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:28:12,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 04:28:12,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308368088] [2021-11-03 04:28:12,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:28:12,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:28:12,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:28:12,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:28:12,883 INFO L87 Difference]: Start difference. First operand 2344 states and 2818 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:20,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:28:20,066 INFO L93 Difference]: Finished difference Result 3372 states and 3793 transitions. [2021-11-03 04:28:20,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:28:20,067 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-03 04:28:20,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:28:20,082 INFO L225 Difference]: With dead ends: 3372 [2021-11-03 04:28:20,082 INFO L226 Difference]: Without dead ends: 3372 [2021-11-03 04:28:20,083 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:28:20,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3372 states. [2021-11-03 04:28:20,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3372 to 2336. [2021-11-03 04:28:20,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2336 states, 1467 states have (on average 1.907293796864349) internal successors, (2798), 2335 states have internal predecessors, (2798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:20,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2336 states to 2336 states and 2798 transitions. [2021-11-03 04:28:20,152 INFO L78 Accepts]: Start accepts. Automaton has 2336 states and 2798 transitions. Word has length 8 [2021-11-03 04:28:20,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:28:20,153 INFO L470 AbstractCegarLoop]: Abstraction has 2336 states and 2798 transitions. [2021-11-03 04:28:20,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:20,153 INFO L276 IsEmpty]: Start isEmpty. Operand 2336 states and 2798 transitions. [2021-11-03 04:28:20,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-03 04:28:20,154 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:28:20,154 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:28:20,168 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-03 04:28:20,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:28:20,365 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr658REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-03 04:28:20,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:28:20,366 INFO L85 PathProgramCache]: Analyzing trace with hash 175289392, now seen corresponding path program 1 times [2021-11-03 04:28:20,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:28:20,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [540505715] [2021-11-03 04:28:20,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:28:20,366 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:28:20,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:28:20,368 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:28:20,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 04:28:20,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:28:20,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:28:20,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:28:20,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:20,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:28:20,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:20,648 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:28:20,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [540505715] [2021-11-03 04:28:20,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [540505715] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:28:20,649 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:28:20,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:28:20,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415494594] [2021-11-03 04:28:20,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:28:20,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:28:20,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:28:20,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:28:20,652 INFO L87 Difference]: Start difference. First operand 2336 states and 2798 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) [2021-11-03 04:28:20,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:28:20,697 INFO L93 Difference]: Finished difference Result 2294 states and 2755 transitions. [2021-11-03 04:28:20,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:28:20,698 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-03 04:28:20,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:28:20,712 INFO L225 Difference]: With dead ends: 2294 [2021-11-03 04:28:20,712 INFO L226 Difference]: Without dead ends: 2294 [2021-11-03 04:28:20,716 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:28:20,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2294 states. [2021-11-03 04:28:20,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2294 to 2294. [2021-11-03 04:28:20,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2294 states, 1449 states have (on average 1.901311249137336) internal successors, (2755), 2293 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:20,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2294 states to 2294 states and 2755 transitions. [2021-11-03 04:28:20,768 INFO L78 Accepts]: Start accepts. Automaton has 2294 states and 2755 transitions. Word has length 11 [2021-11-03 04:28:20,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:28:20,768 INFO L470 AbstractCegarLoop]: Abstraction has 2294 states and 2755 transitions. [2021-11-03 04:28:20,769 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) [2021-11-03 04:28:20,769 INFO L276 IsEmpty]: Start isEmpty. Operand 2294 states and 2755 transitions. [2021-11-03 04:28:20,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-03 04:28:20,770 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:28:20,770 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:28:20,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 04:28:20,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:28:20,988 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr682REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-03 04:28:20,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:28:20,989 INFO L85 PathProgramCache]: Analyzing trace with hash 949435626, now seen corresponding path program 1 times [2021-11-03 04:28:20,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:28:20,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1290879020] [2021-11-03 04:28:20,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:28:20,990 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:28:20,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:28:20,991 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:28:21,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 04:28:21,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:28:21,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:28:21,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:28:21,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:21,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:28:21,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:21,293 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:28:21,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1290879020] [2021-11-03 04:28:21,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1290879020] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:28:21,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:28:21,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 04:28:21,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072270665] [2021-11-03 04:28:21,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:28:21,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:28:21,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:28:21,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:28:21,298 INFO L87 Difference]: Start difference. First operand 2294 states and 2755 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:21,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:28:21,412 INFO L93 Difference]: Finished difference Result 2273 states and 2727 transitions. [2021-11-03 04:28:21,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:28:21,413 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-03 04:28:21,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:28:21,425 INFO L225 Difference]: With dead ends: 2273 [2021-11-03 04:28:21,426 INFO L226 Difference]: Without dead ends: 2273 [2021-11-03 04:28:21,426 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:28:21,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2273 states. [2021-11-03 04:28:21,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2273 to 2272. [2021-11-03 04:28:21,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2272 states, 1441 states have (on average 1.8917418459403192) internal successors, (2726), 2271 states have internal predecessors, (2726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:21,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2272 states to 2272 states and 2726 transitions. [2021-11-03 04:28:21,472 INFO L78 Accepts]: Start accepts. Automaton has 2272 states and 2726 transitions. Word has length 13 [2021-11-03 04:28:21,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:28:21,473 INFO L470 AbstractCegarLoop]: Abstraction has 2272 states and 2726 transitions. [2021-11-03 04:28:21,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:21,473 INFO L276 IsEmpty]: Start isEmpty. Operand 2272 states and 2726 transitions. [2021-11-03 04:28:21,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-03 04:28:21,475 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:28:21,475 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:28:21,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 04:28:21,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:28:21,687 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr334REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-03 04:28:21,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:28:21,688 INFO L85 PathProgramCache]: Analyzing trace with hash 270217471, now seen corresponding path program 1 times [2021-11-03 04:28:21,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:28:21,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1285705576] [2021-11-03 04:28:21,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:28:21,689 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:28:21,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:28:21,689 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:28:21,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 04:28:21,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:28:21,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:28:21,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:28:21,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:21,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:28:22,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:22,013 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:28:22,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1285705576] [2021-11-03 04:28:22,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1285705576] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:28:22,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:28:22,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:28:22,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957798581] [2021-11-03 04:28:22,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:28:22,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:28:22,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:28:22,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:28:22,015 INFO L87 Difference]: Start difference. First operand 2272 states and 2726 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:22,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:28:22,103 INFO L93 Difference]: Finished difference Result 3583 states and 4134 transitions. [2021-11-03 04:28:22,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:28:22,103 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-03 04:28:22,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:28:22,121 INFO L225 Difference]: With dead ends: 3583 [2021-11-03 04:28:22,121 INFO L226 Difference]: Without dead ends: 3583 [2021-11-03 04:28:22,122 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:28:22,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3583 states. [2021-11-03 04:28:22,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3583 to 2194. [2021-11-03 04:28:22,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2194 states, 1387 states have (on average 1.8723864455659698) internal successors, (2597), 2193 states have internal predecessors, (2597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:22,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2194 states to 2194 states and 2597 transitions. [2021-11-03 04:28:22,172 INFO L78 Accepts]: Start accepts. Automaton has 2194 states and 2597 transitions. Word has length 20 [2021-11-03 04:28:22,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:28:22,173 INFO L470 AbstractCegarLoop]: Abstraction has 2194 states and 2597 transitions. [2021-11-03 04:28:22,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:22,174 INFO L276 IsEmpty]: Start isEmpty. Operand 2194 states and 2597 transitions. [2021-11-03 04:28:22,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-03 04:28:22,175 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:28:22,175 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:28:22,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 04:28:22,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:28:22,398 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-03 04:28:22,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:28:22,399 INFO L85 PathProgramCache]: Analyzing trace with hash -673839521, now seen corresponding path program 1 times [2021-11-03 04:28:22,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:28:22,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [595334182] [2021-11-03 04:28:22,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:28:22,402 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:28:22,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:28:22,404 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:28:22,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 04:28:22,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:28:22,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:28:22,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:28:22,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:22,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:28:22,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:22,727 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:28:22,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [595334182] [2021-11-03 04:28:22,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [595334182] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:28:22,728 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:28:22,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:28:22,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146111187] [2021-11-03 04:28:22,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:28:22,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:28:22,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:28:22,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:28:22,730 INFO L87 Difference]: Start difference. First operand 2194 states and 2597 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:22,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:28:22,788 INFO L93 Difference]: Finished difference Result 3506 states and 4057 transitions. [2021-11-03 04:28:22,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:28:22,789 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-03 04:28:22,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:28:22,818 INFO L225 Difference]: With dead ends: 3506 [2021-11-03 04:28:22,818 INFO L226 Difference]: Without dead ends: 3506 [2021-11-03 04:28:22,818 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:28:22,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3506 states. [2021-11-03 04:28:22,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3506 to 2152. [2021-11-03 04:28:22,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 1369 states have (on average 1.8655953250547845) internal successors, (2554), 2151 states have internal predecessors, (2554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:22,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 2554 transitions. [2021-11-03 04:28:22,867 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 2554 transitions. Word has length 20 [2021-11-03 04:28:22,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:28:22,870 INFO L470 AbstractCegarLoop]: Abstraction has 2152 states and 2554 transitions. [2021-11-03 04:28:22,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:22,870 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 2554 transitions. [2021-11-03 04:28:22,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-03 04:28:22,872 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:28:22,872 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:28:22,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 04:28:23,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:28:23,086 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr358REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-03 04:28:23,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:28:23,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1980977049, now seen corresponding path program 1 times [2021-11-03 04:28:23,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:28:23,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [823040212] [2021-11-03 04:28:23,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:28:23,087 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:28:23,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:28:23,089 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:28:23,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 04:28:23,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:28:23,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:28:23,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:28:23,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:23,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:28:23,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:23,441 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:28:23,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [823040212] [2021-11-03 04:28:23,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [823040212] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:28:23,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:28:23,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 04:28:23,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235630453] [2021-11-03 04:28:23,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:28:23,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:28:23,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:28:23,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:28:23,443 INFO L87 Difference]: Start difference. First operand 2152 states and 2554 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:23,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:28:23,557 INFO L93 Difference]: Finished difference Result 3464 states and 3964 transitions. [2021-11-03 04:28:23,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:28:23,558 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-03 04:28:23,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:28:23,569 INFO L225 Difference]: With dead ends: 3464 [2021-11-03 04:28:23,570 INFO L226 Difference]: Without dead ends: 3464 [2021-11-03 04:28:23,570 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:28:23,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3464 states. [2021-11-03 04:28:23,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3464 to 2114. [2021-11-03 04:28:23,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2114 states, 1345 states have (on average 1.8342007434944239) internal successors, (2467), 2113 states have internal predecessors, (2467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:23,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 2467 transitions. [2021-11-03 04:28:23,632 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 2467 transitions. Word has length 22 [2021-11-03 04:28:23,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:28:23,632 INFO L470 AbstractCegarLoop]: Abstraction has 2114 states and 2467 transitions. [2021-11-03 04:28:23,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:23,633 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 2467 transitions. [2021-11-03 04:28:23,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-03 04:28:23,637 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:28:23,637 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:28:23,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 04:28:23,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:28:23,849 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-03 04:28:23,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:28:23,850 INFO L85 PathProgramCache]: Analyzing trace with hash 980278297, now seen corresponding path program 1 times [2021-11-03 04:28:23,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:28:23,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [158635102] [2021-11-03 04:28:23,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:28:23,850 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:28:23,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:28:23,851 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:28:23,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 04:28:24,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:28:24,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:28:24,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:28:24,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:24,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:28:24,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:24,206 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:28:24,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [158635102] [2021-11-03 04:28:24,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [158635102] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:28:24,206 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:28:24,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 04:28:24,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671141140] [2021-11-03 04:28:24,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:28:24,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:28:24,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:28:24,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:28:24,208 INFO L87 Difference]: Start difference. First operand 2114 states and 2467 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:24,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:28:24,331 INFO L93 Difference]: Finished difference Result 3425 states and 3913 transitions. [2021-11-03 04:28:24,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:28:24,332 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-03 04:28:24,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:28:24,343 INFO L225 Difference]: With dead ends: 3425 [2021-11-03 04:28:24,343 INFO L226 Difference]: Without dead ends: 3425 [2021-11-03 04:28:24,344 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:28:24,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3425 states. [2021-11-03 04:28:24,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3425 to 2092. [2021-11-03 04:28:24,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2092 states, 1337 states have (on average 1.8234854151084519) internal successors, (2438), 2091 states have internal predecessors, (2438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:24,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 2438 transitions. [2021-11-03 04:28:24,389 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 2438 transitions. Word has length 22 [2021-11-03 04:28:24,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:28:24,389 INFO L470 AbstractCegarLoop]: Abstraction has 2092 states and 2438 transitions. [2021-11-03 04:28:24,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:24,390 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 2438 transitions. [2021-11-03 04:28:24,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-03 04:28:24,390 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:28:24,391 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:28:24,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 04:28:24,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:28:24,603 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr696REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-03 04:28:24,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:28:24,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1893283832, now seen corresponding path program 1 times [2021-11-03 04:28:24,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:28:24,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [98375983] [2021-11-03 04:28:24,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:28:24,604 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:28:24,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:28:24,605 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:28:24,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 04:28:24,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:28:24,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:28:24,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:28:24,814 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 [2021-11-03 04:28:24,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:24,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:28:25,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:25,056 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:28:25,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [98375983] [2021-11-03 04:28:25,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [98375983] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:28:25,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:28:25,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:28:25,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779393829] [2021-11-03 04:28:25,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:28:25,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:28:25,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:28:25,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:28:25,059 INFO L87 Difference]: Start difference. First operand 2092 states and 2438 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) [2021-11-03 04:28:28,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:28:28,391 INFO L93 Difference]: Finished difference Result 2370 states and 2618 transitions. [2021-11-03 04:28:28,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:28:28,392 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 [2021-11-03 04:28:28,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:28:28,397 INFO L225 Difference]: With dead ends: 2370 [2021-11-03 04:28:28,398 INFO L226 Difference]: Without dead ends: 2370 [2021-11-03 04:28:28,398 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:28:28,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2370 states. [2021-11-03 04:28:28,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2370 to 2088. [2021-11-03 04:28:28,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2088 states, 1337 states have (on average 1.8204936424831712) internal successors, (2434), 2087 states have internal predecessors, (2434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:28,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 2434 transitions. [2021-11-03 04:28:28,440 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 2434 transitions. Word has length 27 [2021-11-03 04:28:28,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:28:28,441 INFO L470 AbstractCegarLoop]: Abstraction has 2088 states and 2434 transitions. [2021-11-03 04:28:28,441 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) [2021-11-03 04:28:28,441 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 2434 transitions. [2021-11-03 04:28:28,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-03 04:28:28,442 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:28:28,442 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:28:28,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 04:28:28,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:28:28,655 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr697REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-03 04:28:28,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:28:28,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1893283833, now seen corresponding path program 1 times [2021-11-03 04:28:28,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:28:28,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [26697524] [2021-11-03 04:28:28,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:28:28,656 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:28:28,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:28:28,657 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:28:28,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 04:28:28,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:28:28,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:28:28,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:28:28,934 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 [2021-11-03 04:28:29,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:29,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:28:29,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:29,720 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:28:29,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [26697524] [2021-11-03 04:28:29,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [26697524] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:28:29,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:28:29,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 04:28:29,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601219246] [2021-11-03 04:28:29,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:28:29,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:28:29,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:28:29,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:28:29,723 INFO L87 Difference]: Start difference. First operand 2088 states and 2434 transitions. Second operand has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 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) [2021-11-03 04:28:40,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:28:40,882 INFO L93 Difference]: Finished difference Result 2954 states and 3287 transitions. [2021-11-03 04:28:40,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 04:28:40,888 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 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 27 [2021-11-03 04:28:40,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:28:40,893 INFO L225 Difference]: With dead ends: 2954 [2021-11-03 04:28:40,894 INFO L226 Difference]: Without dead ends: 2954 [2021-11-03 04:28:40,894 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:28:40,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2021-11-03 04:28:40,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2121. [2021-11-03 04:28:40,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2121 states, 1371 states have (on average 1.8023340627279358) internal successors, (2471), 2120 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:40,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2121 states to 2121 states and 2471 transitions. [2021-11-03 04:28:40,932 INFO L78 Accepts]: Start accepts. Automaton has 2121 states and 2471 transitions. Word has length 27 [2021-11-03 04:28:40,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:28:40,932 INFO L470 AbstractCegarLoop]: Abstraction has 2121 states and 2471 transitions. [2021-11-03 04:28:40,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 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) [2021-11-03 04:28:40,933 INFO L276 IsEmpty]: Start isEmpty. Operand 2121 states and 2471 transitions. [2021-11-03 04:28:40,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-03 04:28:40,934 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:28:40,934 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:28:40,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 04:28:41,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:28:41,145 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr372REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-03 04:28:41,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:28:41,146 INFO L85 PathProgramCache]: Analyzing trace with hash 187122631, now seen corresponding path program 1 times [2021-11-03 04:28:41,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:28:41,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1982843840] [2021-11-03 04:28:41,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:28:41,150 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:28:41,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:28:41,151 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:28:41,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 04:28:41,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:28:41,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:28:41,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:28:41,486 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 [2021-11-03 04:28:41,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:41,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:28:41,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:41,759 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:28:41,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1982843840] [2021-11-03 04:28:41,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1982843840] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:28:41,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:28:41,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:28:41,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375247470] [2021-11-03 04:28:41,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:28:41,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:28:41,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:28:41,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:28:41,761 INFO L87 Difference]: Start difference. First operand 2121 states and 2471 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:46,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:28:46,976 INFO L93 Difference]: Finished difference Result 4548 states and 5123 transitions. [2021-11-03 04:28:46,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:28:46,976 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2021-11-03 04:28:46,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:28:46,983 INFO L225 Difference]: With dead ends: 4548 [2021-11-03 04:28:46,983 INFO L226 Difference]: Without dead ends: 4548 [2021-11-03 04:28:46,983 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:28:46,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4548 states. [2021-11-03 04:28:47,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4548 to 2118. [2021-11-03 04:28:47,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2118 states, 1371 states have (on average 1.7943107221006565) internal successors, (2460), 2117 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:47,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2118 states to 2118 states and 2460 transitions. [2021-11-03 04:28:47,020 INFO L78 Accepts]: Start accepts. Automaton has 2118 states and 2460 transitions. Word has length 36 [2021-11-03 04:28:47,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:28:47,021 INFO L470 AbstractCegarLoop]: Abstraction has 2118 states and 2460 transitions. [2021-11-03 04:28:47,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:47,021 INFO L276 IsEmpty]: Start isEmpty. Operand 2118 states and 2460 transitions. [2021-11-03 04:28:47,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-03 04:28:47,022 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:28:47,022 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:28:47,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 04:28:47,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:28:47,234 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr373REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-03 04:28:47,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:28:47,234 INFO L85 PathProgramCache]: Analyzing trace with hash 187122632, now seen corresponding path program 1 times [2021-11-03 04:28:47,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:28:47,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [555371293] [2021-11-03 04:28:47,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:28:47,235 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:28:47,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:28:47,236 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:28:47,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 04:28:47,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:28:47,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:28:47,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:28:47,535 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 [2021-11-03 04:28:47,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:47,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:28:48,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:48,308 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:28:48,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [555371293] [2021-11-03 04:28:48,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [555371293] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:28:48,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:28:48,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 04:28:48,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280125429] [2021-11-03 04:28:48,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:28:48,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:28:48,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:28:48,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:28:48,310 INFO L87 Difference]: Start difference. First operand 2118 states and 2460 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:04,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:29:04,802 INFO L93 Difference]: Finished difference Result 4266 states and 4769 transitions. [2021-11-03 04:29:04,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:29:04,803 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 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 36 [2021-11-03 04:29:04,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:29:04,810 INFO L225 Difference]: With dead ends: 4266 [2021-11-03 04:29:04,811 INFO L226 Difference]: Without dead ends: 4266 [2021-11-03 04:29:04,811 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:29:04,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4266 states. [2021-11-03 04:29:04,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4266 to 2118. [2021-11-03 04:29:04,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2118 states, 1371 states have (on average 1.7913931436907367) internal successors, (2456), 2117 states have internal predecessors, (2456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:04,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2118 states to 2118 states and 2456 transitions. [2021-11-03 04:29:04,848 INFO L78 Accepts]: Start accepts. Automaton has 2118 states and 2456 transitions. Word has length 36 [2021-11-03 04:29:04,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:29:04,848 INFO L470 AbstractCegarLoop]: Abstraction has 2118 states and 2456 transitions. [2021-11-03 04:29:04,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:04,849 INFO L276 IsEmpty]: Start isEmpty. Operand 2118 states and 2456 transitions. [2021-11-03 04:29:04,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-03 04:29:04,849 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:29:04,849 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:29:04,875 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-03 04:29:05,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:29:05,062 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr54REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-03 04:29:05,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:29:05,062 INFO L85 PathProgramCache]: Analyzing trace with hash -773066201, now seen corresponding path program 1 times [2021-11-03 04:29:05,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:29:05,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1522280125] [2021-11-03 04:29:05,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:29:05,063 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:29:05,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:29:05,065 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:29:05,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 04:29:05,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:29:05,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:29:05,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:29:05,400 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 [2021-11-03 04:29:05,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:05,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:29:05,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:05,656 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:29:05,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1522280125] [2021-11-03 04:29:05,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1522280125] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:29:05,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:29:05,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:29:05,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340453237] [2021-11-03 04:29:05,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:29:05,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:29:05,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:29:05,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:29:05,658 INFO L87 Difference]: Start difference. First operand 2118 states and 2456 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:10,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:29:10,323 INFO L93 Difference]: Finished difference Result 4152 states and 4703 transitions. [2021-11-03 04:29:10,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:29:10,325 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2021-11-03 04:29:10,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:29:10,332 INFO L225 Difference]: With dead ends: 4152 [2021-11-03 04:29:10,332 INFO L226 Difference]: Without dead ends: 4152 [2021-11-03 04:29:10,333 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:29:10,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4152 states. [2021-11-03 04:29:10,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4152 to 2114. [2021-11-03 04:29:10,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2114 states, 1371 states have (on average 1.7884755652808169) internal successors, (2452), 2113 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:10,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 2452 transitions. [2021-11-03 04:29:10,364 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 2452 transitions. Word has length 36 [2021-11-03 04:29:10,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:29:10,365 INFO L470 AbstractCegarLoop]: Abstraction has 2114 states and 2452 transitions. [2021-11-03 04:29:10,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:10,365 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 2452 transitions. [2021-11-03 04:29:10,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-03 04:29:10,366 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:29:10,366 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:29:10,381 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-03 04:29:10,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:29:10,578 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr55REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-03 04:29:10,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:29:10,578 INFO L85 PathProgramCache]: Analyzing trace with hash -773066200, now seen corresponding path program 1 times [2021-11-03 04:29:10,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:29:10,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1142909028] [2021-11-03 04:29:10,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:29:10,579 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:29:10,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:29:10,579 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:29:10,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 04:29:10,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:29:10,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:29:10,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:29:10,914 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 [2021-11-03 04:29:11,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:11,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:29:11,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:11,585 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:29:11,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1142909028] [2021-11-03 04:29:11,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1142909028] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:29:11,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:29:11,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 04:29:11,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255428860] [2021-11-03 04:29:11,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:29:11,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:29:11,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:29:11,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:29:11,587 INFO L87 Difference]: Start difference. First operand 2114 states and 2452 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:22,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:29:22,975 INFO L93 Difference]: Finished difference Result 4034 states and 4463 transitions. [2021-11-03 04:29:22,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:29:22,976 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 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 36 [2021-11-03 04:29:22,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:29:22,979 INFO L225 Difference]: With dead ends: 4034 [2021-11-03 04:29:22,979 INFO L226 Difference]: Without dead ends: 4034 [2021-11-03 04:29:22,979 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:29:22,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4034 states. [2021-11-03 04:29:23,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4034 to 2110. [2021-11-03 04:29:23,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2110 states, 1371 states have (on average 1.785557986870897) internal successors, (2448), 2109 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:23,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2110 states to 2110 states and 2448 transitions. [2021-11-03 04:29:23,006 INFO L78 Accepts]: Start accepts. Automaton has 2110 states and 2448 transitions. Word has length 36 [2021-11-03 04:29:23,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:29:23,007 INFO L470 AbstractCegarLoop]: Abstraction has 2110 states and 2448 transitions. [2021-11-03 04:29:23,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:23,007 INFO L276 IsEmpty]: Start isEmpty. Operand 2110 states and 2448 transitions. [2021-11-03 04:29:23,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-03 04:29:23,008 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:29:23,008 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:29:23,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-03 04:29:23,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:29:23,221 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-03 04:29:23,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:29:23,222 INFO L85 PathProgramCache]: Analyzing trace with hash -480226171, now seen corresponding path program 1 times [2021-11-03 04:29:23,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:29:23,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [308769537] [2021-11-03 04:29:23,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:29:23,224 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:29:23,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:29:23,227 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:29:23,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 04:29:23,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:29:23,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:29:23,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:29:23,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:23,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:29:23,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:23,811 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:29:23,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [308769537] [2021-11-03 04:29:23,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [308769537] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:29:23,812 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:29:23,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:29:23,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545223285] [2021-11-03 04:29:23,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:29:23,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:29:23,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:29:23,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:29:23,813 INFO L87 Difference]: Start difference. First operand 2110 states and 2448 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:23,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:29:23,872 INFO L93 Difference]: Finished difference Result 2104 states and 2434 transitions. [2021-11-03 04:29:23,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:29:23,872 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-03 04:29:23,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:29:23,875 INFO L225 Difference]: With dead ends: 2104 [2021-11-03 04:29:23,875 INFO L226 Difference]: Without dead ends: 2104 [2021-11-03 04:29:23,875 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:29:23,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-11-03 04:29:23,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 2104. [2021-11-03 04:29:23,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2104 states, 1365 states have (on average 1.7831501831501833) internal successors, (2434), 2103 states have internal predecessors, (2434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:23,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 2434 transitions. [2021-11-03 04:29:23,903 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 2434 transitions. Word has length 40 [2021-11-03 04:29:23,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:29:23,903 INFO L470 AbstractCegarLoop]: Abstraction has 2104 states and 2434 transitions. [2021-11-03 04:29:23,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:23,903 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 2434 transitions. [2021-11-03 04:29:23,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-03 04:29:23,905 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:29:23,905 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:29:23,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-03 04:29:24,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:29:24,118 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-03 04:29:24,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:29:24,119 INFO L85 PathProgramCache]: Analyzing trace with hash -952585927, now seen corresponding path program 1 times [2021-11-03 04:29:24,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:29:24,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1905657620] [2021-11-03 04:29:24,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:29:24,120 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:29:24,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:29:24,122 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:29:24,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 04:29:24,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:29:24,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:29:24,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:29:24,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:24,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:29:25,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:25,110 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:29:25,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1905657620] [2021-11-03 04:29:25,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1905657620] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:29:25,110 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:29:25,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:29:25,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828778756] [2021-11-03 04:29:25,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:29:25,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:29:25,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:29:25,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:29:25,111 INFO L87 Difference]: Start difference. First operand 2104 states and 2434 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:25,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:29:25,289 INFO L93 Difference]: Finished difference Result 3327 states and 3785 transitions. [2021-11-03 04:29:25,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:29:25,290 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-11-03 04:29:25,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:29:25,292 INFO L225 Difference]: With dead ends: 3327 [2021-11-03 04:29:25,292 INFO L226 Difference]: Without dead ends: 3327 [2021-11-03 04:29:25,293 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:29:25,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3327 states. [2021-11-03 04:29:25,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3327 to 2732. [2021-11-03 04:29:25,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2732 states, 1993 states have (on average 1.765178123432012) internal successors, (3518), 2731 states have internal predecessors, (3518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:25,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2732 states to 2732 states and 3518 transitions. [2021-11-03 04:29:25,331 INFO L78 Accepts]: Start accepts. Automaton has 2732 states and 3518 transitions. Word has length 48 [2021-11-03 04:29:25,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:29:25,331 INFO L470 AbstractCegarLoop]: Abstraction has 2732 states and 3518 transitions. [2021-11-03 04:29:25,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:25,332 INFO L276 IsEmpty]: Start isEmpty. Operand 2732 states and 3518 transitions. [2021-11-03 04:29:25,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-03 04:29:25,333 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:29:25,333 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:29:25,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-03 04:29:25,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:29:25,549 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-03 04:29:25,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:29:25,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1775606781, now seen corresponding path program 1 times [2021-11-03 04:29:25,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:29:25,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1215378388] [2021-11-03 04:29:25,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:29:25,553 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:29:25,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:29:25,556 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:29:25,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-03 04:29:26,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:29:26,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:29:26,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:29:26,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:26,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:29:26,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:26,271 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:29:26,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1215378388] [2021-11-03 04:29:26,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1215378388] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:29:26,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:29:26,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:29:26,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819487479] [2021-11-03 04:29:26,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:29:26,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:29:26,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:29:26,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:29:26,274 INFO L87 Difference]: Start difference. First operand 2732 states and 3518 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:26,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:29:26,337 INFO L93 Difference]: Finished difference Result 3764 states and 4618 transitions. [2021-11-03 04:29:26,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:29:26,337 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 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 51 [2021-11-03 04:29:26,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:29:26,341 INFO L225 Difference]: With dead ends: 3764 [2021-11-03 04:29:26,341 INFO L226 Difference]: Without dead ends: 3764 [2021-11-03 04:29:26,342 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:29:26,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3764 states. [2021-11-03 04:29:26,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3764 to 2708. [2021-11-03 04:29:26,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2708 states, 1969 states have (on average 1.7663788725241238) internal successors, (3478), 2707 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:26,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2708 states to 2708 states and 3478 transitions. [2021-11-03 04:29:26,374 INFO L78 Accepts]: Start accepts. Automaton has 2708 states and 3478 transitions. Word has length 51 [2021-11-03 04:29:26,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:29:26,374 INFO L470 AbstractCegarLoop]: Abstraction has 2708 states and 3478 transitions. [2021-11-03 04:29:26,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:26,374 INFO L276 IsEmpty]: Start isEmpty. Operand 2708 states and 3478 transitions. [2021-11-03 04:29:26,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-03 04:29:26,375 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:29:26,375 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:29:26,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-03 04:29:26,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:29:26,576 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-03 04:29:26,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:29:26,578 INFO L85 PathProgramCache]: Analyzing trace with hash 732181606, now seen corresponding path program 1 times [2021-11-03 04:29:26,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:29:26,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [690366448] [2021-11-03 04:29:26,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:29:26,580 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:29:26,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:29:26,583 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:29:26,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-03 04:29:27,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:29:27,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:29:27,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:29:27,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:27,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:29:27,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:27,319 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:29:27,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [690366448] [2021-11-03 04:29:27,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [690366448] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:29:27,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:29:27,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:29:27,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222889892] [2021-11-03 04:29:27,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:29:27,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:29:27,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:29:27,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:29:27,322 INFO L87 Difference]: Start difference. First operand 2708 states and 3478 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:27,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:29:27,376 INFO L93 Difference]: Finished difference Result 3500 states and 4107 transitions. [2021-11-03 04:29:27,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:29:27,377 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-11-03 04:29:27,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:29:27,379 INFO L225 Difference]: With dead ends: 3500 [2021-11-03 04:29:27,379 INFO L226 Difference]: Without dead ends: 3500 [2021-11-03 04:29:27,379 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:29:27,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3500 states. [2021-11-03 04:29:27,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3500 to 2696. [2021-11-03 04:29:27,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2696 states, 1957 states have (on average 1.766990291262136) internal successors, (3458), 2695 states have internal predecessors, (3458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:27,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2696 states to 2696 states and 3458 transitions. [2021-11-03 04:29:27,418 INFO L78 Accepts]: Start accepts. Automaton has 2696 states and 3458 transitions. Word has length 54 [2021-11-03 04:29:27,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:29:27,419 INFO L470 AbstractCegarLoop]: Abstraction has 2696 states and 3458 transitions. [2021-11-03 04:29:27,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:27,419 INFO L276 IsEmpty]: Start isEmpty. Operand 2696 states and 3458 transitions. [2021-11-03 04:29:27,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-03 04:29:27,420 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:29:27,420 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:29:27,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-03 04:29:27,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:29:27,635 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr740ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-03 04:29:27,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:29:27,636 INFO L85 PathProgramCache]: Analyzing trace with hash -993308447, now seen corresponding path program 1 times [2021-11-03 04:29:27,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:29:27,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1569085600] [2021-11-03 04:29:27,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:29:27,640 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:29:27,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:29:27,643 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:29:27,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-03 04:29:28,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:29:28,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:29:28,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:29:28,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:29:28,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:29:28,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:29:28,274 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-03 04:29:28,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-03 04:29:28,325 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-03 04:29:28,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-11-03 04:29:28,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:28,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:29:28,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:28,588 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:29:28,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1569085600] [2021-11-03 04:29:28,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1569085600] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:29:28,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:29:28,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:29:28,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829015357] [2021-11-03 04:29:28,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:29:28,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:29:28,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:29:28,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:29:28,589 INFO L87 Difference]: Start difference. First operand 2696 states and 3458 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:30,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:29:30,127 INFO L93 Difference]: Finished difference Result 2663 states and 3424 transitions. [2021-11-03 04:29:30,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:29:30,128 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 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 54 [2021-11-03 04:29:30,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:29:30,129 INFO L225 Difference]: With dead ends: 2663 [2021-11-03 04:29:30,130 INFO L226 Difference]: Without dead ends: 2663 [2021-11-03 04:29:30,130 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:29:30,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2663 states. [2021-11-03 04:29:30,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2663 to 2662. [2021-11-03 04:29:30,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2662 states, 1923 states have (on average 1.78003120124805) internal successors, (3423), 2661 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:30,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2662 states to 2662 states and 3423 transitions. [2021-11-03 04:29:30,162 INFO L78 Accepts]: Start accepts. Automaton has 2662 states and 3423 transitions. Word has length 54 [2021-11-03 04:29:30,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:29:30,163 INFO L470 AbstractCegarLoop]: Abstraction has 2662 states and 3423 transitions. [2021-11-03 04:29:30,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:30,163 INFO L276 IsEmpty]: Start isEmpty. Operand 2662 states and 3423 transitions. [2021-11-03 04:29:30,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-03 04:29:30,164 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:29:30,164 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:29:30,195 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-03 04:29:30,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:29:30,397 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-03 04:29:30,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:29:30,398 INFO L85 PathProgramCache]: Analyzing trace with hash -637866953, now seen corresponding path program 1 times [2021-11-03 04:29:30,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:29:30,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [50379241] [2021-11-03 04:29:30,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:29:30,401 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:29:30,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:29:30,403 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:29:30,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-03 04:29:31,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:29:31,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:29:31,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:29:31,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:31,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:29:31,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:31,877 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:29:31,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [50379241] [2021-11-03 04:29:31,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [50379241] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:29:31,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:29:31,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:29:31,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38571509] [2021-11-03 04:29:31,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:29:31,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:29:31,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:29:31,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:29:31,880 INFO L87 Difference]: Start difference. First operand 2662 states and 3423 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:32,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:29:32,029 INFO L93 Difference]: Finished difference Result 3712 states and 4603 transitions. [2021-11-03 04:29:32,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:29:32,030 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 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 59 [2021-11-03 04:29:32,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:29:32,033 INFO L225 Difference]: With dead ends: 3712 [2021-11-03 04:29:32,033 INFO L226 Difference]: Without dead ends: 3712 [2021-11-03 04:29:32,033 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:29:32,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3712 states. [2021-11-03 04:29:32,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3712 to 3343. [2021-11-03 04:29:32,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3343 states, 2604 states have (on average 1.7542242703533026) internal successors, (4568), 3342 states have internal predecessors, (4568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:32,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3343 states to 3343 states and 4568 transitions. [2021-11-03 04:29:32,077 INFO L78 Accepts]: Start accepts. Automaton has 3343 states and 4568 transitions. Word has length 59 [2021-11-03 04:29:32,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:29:32,077 INFO L470 AbstractCegarLoop]: Abstraction has 3343 states and 4568 transitions. [2021-11-03 04:29:32,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:32,077 INFO L276 IsEmpty]: Start isEmpty. Operand 3343 states and 4568 transitions. [2021-11-03 04:29:32,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-03 04:29:32,078 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:29:32,078 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:29:32,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-03 04:29:32,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:29:32,293 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr391REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-03 04:29:32,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:29:32,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1882812110, now seen corresponding path program 1 times [2021-11-03 04:29:32,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:29:32,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [620305009] [2021-11-03 04:29:32,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:29:32,297 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:29:32,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:29:32,299 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:29:32,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-03 04:29:33,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:29:33,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:29:33,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:29:33,194 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 [2021-11-03 04:29:33,200 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 [2021-11-03 04:29:33,869 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-03 04:29:33,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2021-11-03 04:29:33,876 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-03 04:29:33,876 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 25 treesize of output 21 [2021-11-03 04:29:33,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:33,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:29:38,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:38,726 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:29:38,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [620305009] [2021-11-03 04:29:38,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [620305009] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:29:38,727 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:29:38,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 04:29:38,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998133839] [2021-11-03 04:29:38,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:29:38,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:29:38,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:29:38,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-03 04:29:38,730 INFO L87 Difference]: Start difference. First operand 3343 states and 4568 transitions. Second operand has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:30:03,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:30:03,121 INFO L93 Difference]: Finished difference Result 6126 states and 8176 transitions. [2021-11-03 04:30:03,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:30:03,122 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-03 04:30:03,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:30:03,127 INFO L225 Difference]: With dead ends: 6126 [2021-11-03 04:30:03,128 INFO L226 Difference]: Without dead ends: 6126 [2021-11-03 04:30:03,128 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=26, Invalid=28, Unknown=2, NotChecked=0, Total=56 [2021-11-03 04:30:03,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6126 states. [2021-11-03 04:30:03,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6126 to 3287. [2021-11-03 04:30:03,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3287 states, 2612 states have (on average 1.6952526799387442) internal successors, (4428), 3286 states have internal predecessors, (4428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:30:03,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3287 states to 3287 states and 4428 transitions. [2021-11-03 04:30:03,176 INFO L78 Accepts]: Start accepts. Automaton has 3287 states and 4428 transitions. Word has length 62 [2021-11-03 04:30:03,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:30:03,177 INFO L470 AbstractCegarLoop]: Abstraction has 3287 states and 4428 transitions. [2021-11-03 04:30:03,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:30:03,177 INFO L276 IsEmpty]: Start isEmpty. Operand 3287 states and 4428 transitions. [2021-11-03 04:30:03,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-03 04:30:03,178 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:30:03,178 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:30:03,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-03 04:30:03,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:30:03,395 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr396ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-03 04:30:03,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:30:03,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1203198829, now seen corresponding path program 1 times [2021-11-03 04:30:03,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:30:03,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [786130283] [2021-11-03 04:30:03,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:30:03,399 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:30:03,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:30:03,401 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:30:03,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-03 04:30:04,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:30:04,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:30:04,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:30:04,245 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 [2021-11-03 04:30:04,263 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 23 treesize of output 19 [2021-11-03 04:30:04,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-03 04:30:04,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:30:04,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:30:04,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:30:04,517 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:30:04,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [786130283] [2021-11-03 04:30:04,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [786130283] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:30:04,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:30:04,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 04:30:04,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789850930] [2021-11-03 04:30:04,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:30:04,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:30:04,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:30:04,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:30:04,518 INFO L87 Difference]: Start difference. First operand 3287 states and 4428 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:30:12,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:30:12,928 INFO L93 Difference]: Finished difference Result 5249 states and 7016 transitions. [2021-11-03 04:30:12,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-03 04:30:12,928 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-11-03 04:30:12,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:30:12,934 INFO L225 Difference]: With dead ends: 5249 [2021-11-03 04:30:12,934 INFO L226 Difference]: Without dead ends: 5249 [2021-11-03 04:30:12,934 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-03 04:30:12,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5249 states. [2021-11-03 04:30:12,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5249 to 3286. [2021-11-03 04:30:12,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3286 states, 2612 states have (on average 1.694104134762634) internal successors, (4425), 3285 states have internal predecessors, (4425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:30:12,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3286 states to 3286 states and 4425 transitions. [2021-11-03 04:30:12,970 INFO L78 Accepts]: Start accepts. Automaton has 3286 states and 4425 transitions. Word has length 68 [2021-11-03 04:30:12,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:30:12,970 INFO L470 AbstractCegarLoop]: Abstraction has 3286 states and 4425 transitions. [2021-11-03 04:30:12,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:30:12,971 INFO L276 IsEmpty]: Start isEmpty. Operand 3286 states and 4425 transitions. [2021-11-03 04:30:12,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-03 04:30:12,971 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:30:12,972 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:30:12,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-03 04:30:13,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:30:13,187 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr78ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-03 04:30:13,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:30:13,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1028979469, now seen corresponding path program 1 times [2021-11-03 04:30:13,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:30:13,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1374506260] [2021-11-03 04:30:13,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:30:13,188 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:30:13,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:30:13,188 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:30:13,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-03 04:30:13,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:30:13,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:30:13,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:30:14,011 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 [2021-11-03 04:30:14,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-03 04:30:14,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-03 04:30:14,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:30:14,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:30:14,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:30:14,218 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:30:14,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1374506260] [2021-11-03 04:30:14,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1374506260] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:30:14,218 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:30:14,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 04:30:14,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567363836] [2021-11-03 04:30:14,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:30:14,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:30:14,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:30:14,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:30:14,220 INFO L87 Difference]: Start difference. First operand 3286 states and 4425 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:30:22,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:30:22,733 INFO L93 Difference]: Finished difference Result 5241 states and 7002 transitions. [2021-11-03 04:30:22,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-03 04:30:22,734 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-11-03 04:30:22,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:30:22,738 INFO L225 Difference]: With dead ends: 5241 [2021-11-03 04:30:22,738 INFO L226 Difference]: Without dead ends: 5241 [2021-11-03 04:30:22,738 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-03 04:30:22,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5241 states. [2021-11-03 04:30:22,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5241 to 3285. [2021-11-03 04:30:22,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3285 states, 2612 states have (on average 1.6933384379785605) internal successors, (4423), 3284 states have internal predecessors, (4423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:30:22,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3285 states to 3285 states and 4423 transitions. [2021-11-03 04:30:22,808 INFO L78 Accepts]: Start accepts. Automaton has 3285 states and 4423 transitions. Word has length 68 [2021-11-03 04:30:22,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:30:22,809 INFO L470 AbstractCegarLoop]: Abstraction has 3285 states and 4423 transitions. [2021-11-03 04:30:22,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:30:22,809 INFO L276 IsEmpty]: Start isEmpty. Operand 3285 states and 4423 transitions. [2021-11-03 04:30:22,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-03 04:30:22,816 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:30:22,816 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:30:22,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-03 04:30:23,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:30:23,035 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr397ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-03 04:30:23,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:30:23,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1355543210, now seen corresponding path program 1 times [2021-11-03 04:30:23,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:30:23,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1459203293] [2021-11-03 04:30:23,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:30:23,037 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:30:23,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:30:23,037 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:30:23,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-03 04:30:23,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:30:23,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 04:30:23,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:30:23,893 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 [2021-11-03 04:30:23,921 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 [2021-11-03 04:30:23,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-03 04:30:24,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-03 04:30:24,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-03 04:30:24,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:30:24,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:30:24,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:30:24,558 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:30:24,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1459203293] [2021-11-03 04:30:24,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1459203293] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:30:24,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:30:24,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-03 04:30:24,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663808489] [2021-11-03 04:30:24,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 04:30:24,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:30:24,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 04:30:24,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:30:24,560 INFO L87 Difference]: Start difference. First operand 3285 states and 4423 transitions. Second operand has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:30:50,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:30:50,950 INFO L93 Difference]: Finished difference Result 4715 states and 6266 transitions. [2021-11-03 04:30:50,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-03 04:30:50,952 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 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 69 [2021-11-03 04:30:50,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:30:50,954 INFO L225 Difference]: With dead ends: 4715 [2021-11-03 04:30:50,954 INFO L226 Difference]: Without dead ends: 4715 [2021-11-03 04:30:50,955 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-11-03 04:30:50,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4715 states. [2021-11-03 04:30:50,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4715 to 3284. [2021-11-03 04:30:50,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3284 states, 2612 states have (on average 1.6921898928024501) internal successors, (4420), 3283 states have internal predecessors, (4420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:30:50,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3284 states to 3284 states and 4420 transitions. [2021-11-03 04:30:50,983 INFO L78 Accepts]: Start accepts. Automaton has 3284 states and 4420 transitions. Word has length 69 [2021-11-03 04:30:50,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:30:50,983 INFO L470 AbstractCegarLoop]: Abstraction has 3284 states and 4420 transitions. [2021-11-03 04:30:50,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:30:50,984 INFO L276 IsEmpty]: Start isEmpty. Operand 3284 states and 4420 transitions. [2021-11-03 04:30:50,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-03 04:30:50,984 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:30:50,984 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:30:50,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-03 04:30:51,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:30:51,185 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr79ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-03 04:30:51,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:30:51,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1833592125, now seen corresponding path program 1 times [2021-11-03 04:30:51,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:30:51,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [124566889] [2021-11-03 04:30:51,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:30:51,186 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:30:51,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:30:51,187 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:30:51,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-03 04:30:51,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:30:51,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 04:30:51,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:30:52,083 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 [2021-11-03 04:30:52,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-03 04:30:52,117 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 [2021-11-03 04:30:52,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-03 04:30:52,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-03 04:30:52,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:30:52,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:30:52,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:30:52,791 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:30:52,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [124566889] [2021-11-03 04:30:52,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [124566889] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:30:52,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:30:52,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-03 04:30:52,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414928919] [2021-11-03 04:30:52,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 04:30:52,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:30:52,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 04:30:52,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:30:52,793 INFO L87 Difference]: Start difference. First operand 3284 states and 4420 transitions. Second operand has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:23,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:31:23,245 INFO L93 Difference]: Finished difference Result 4710 states and 6257 transitions. [2021-11-03 04:31:23,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-03 04:31:23,246 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 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 69 [2021-11-03 04:31:23,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:31:23,250 INFO L225 Difference]: With dead ends: 4710 [2021-11-03 04:31:23,250 INFO L226 Difference]: Without dead ends: 4710 [2021-11-03 04:31:23,250 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-11-03 04:31:23,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4710 states. [2021-11-03 04:31:23,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4710 to 3283. [2021-11-03 04:31:23,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3283 states, 2612 states have (on average 1.6914241960183767) internal successors, (4418), 3282 states have internal predecessors, (4418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:23,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3283 states to 3283 states and 4418 transitions. [2021-11-03 04:31:23,285 INFO L78 Accepts]: Start accepts. Automaton has 3283 states and 4418 transitions. Word has length 69 [2021-11-03 04:31:23,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:31:23,286 INFO L470 AbstractCegarLoop]: Abstraction has 3283 states and 4418 transitions. [2021-11-03 04:31:23,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:23,286 INFO L276 IsEmpty]: Start isEmpty. Operand 3283 states and 4418 transitions. [2021-11-03 04:31:23,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-03 04:31:23,287 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:31:23,287 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:31:23,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-03 04:31:23,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:31:23,487 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr400REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-03 04:31:23,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:31:23,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1361720913, now seen corresponding path program 1 times [2021-11-03 04:31:23,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:31:23,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [311091306] [2021-11-03 04:31:23,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:31:23,488 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:31:23,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:31:23,489 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:31:23,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-03 04:31:24,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:31:24,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:31:24,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:31:24,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:31:24,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:31:24,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:31:24,621 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:31:24,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [311091306] [2021-11-03 04:31:24,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [311091306] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:31:24,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:31:24,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:31:24,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876523241] [2021-11-03 04:31:24,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:31:24,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:31:24,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:31:24,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:31:24,623 INFO L87 Difference]: Start difference. First operand 3283 states and 4418 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:24,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:31:24,926 INFO L93 Difference]: Finished difference Result 5238 states and 6989 transitions. [2021-11-03 04:31:24,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:31:24,927 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 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 73 [2021-11-03 04:31:24,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:31:24,932 INFO L225 Difference]: With dead ends: 5238 [2021-11-03 04:31:24,932 INFO L226 Difference]: Without dead ends: 5238 [2021-11-03 04:31:24,932 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:31:24,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5238 states. [2021-11-03 04:31:24,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5238 to 3298. [2021-11-03 04:31:24,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3298 states, 2627 states have (on average 1.687476208602969) internal successors, (4433), 3297 states have internal predecessors, (4433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:24,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3298 states to 3298 states and 4433 transitions. [2021-11-03 04:31:24,968 INFO L78 Accepts]: Start accepts. Automaton has 3298 states and 4433 transitions. Word has length 73 [2021-11-03 04:31:24,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:31:24,969 INFO L470 AbstractCegarLoop]: Abstraction has 3298 states and 4433 transitions. [2021-11-03 04:31:24,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:24,969 INFO L276 IsEmpty]: Start isEmpty. Operand 3298 states and 4433 transitions. [2021-11-03 04:31:24,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-03 04:31:24,970 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:31:24,970 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:31:25,003 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-11-03 04:31:25,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:31:25,184 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr400REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-03 04:31:25,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:31:25,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1412235279, now seen corresponding path program 1 times [2021-11-03 04:31:25,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:31:25,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1747168] [2021-11-03 04:31:25,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:31:25,185 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:31:25,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:31:25,186 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:31:25,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-03 04:31:26,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:31:26,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:31:26,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:31:26,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:31:26,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:31:26,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:31:26,512 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:31:26,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1747168] [2021-11-03 04:31:26,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1747168] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:31:26,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [787354686] [2021-11-03 04:31:26,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:31:26,513 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:31:26,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:31:26,514 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:31:26,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-03 04:31:27,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:31:27,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:31:27,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:31:27,904 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:31:27,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:31:28,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:31:28,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [787354686] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:31:28,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411322306] [2021-11-03 04:31:28,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:31:28,108 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:31:28,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:31:28,110 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:31:28,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-03 04:31:29,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:31:29,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:31:29,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:31:29,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:31:29,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:31:29,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:31:29,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411322306] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:31:29,450 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:31:29,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2021-11-03 04:31:29,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283963405] [2021-11-03 04:31:29,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 04:31:29,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:31:29,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 04:31:29,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:31:29,452 INFO L87 Difference]: Start difference. First operand 3298 states and 4433 transitions. Second operand has 10 states, 10 states have (on average 8.1) internal successors, (81), 10 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:30,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:31:30,395 INFO L93 Difference]: Finished difference Result 5268 states and 7019 transitions. [2021-11-03 04:31:30,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 04:31:30,396 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.1) internal successors, (81), 10 states have internal predecessors, (81), 0 states have call successors, (0), 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 75 [2021-11-03 04:31:30,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:31:30,400 INFO L225 Difference]: With dead ends: 5268 [2021-11-03 04:31:30,400 INFO L226 Difference]: Without dead ends: 5268 [2021-11-03 04:31:30,401 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 436 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-11-03 04:31:30,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5268 states. [2021-11-03 04:31:30,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5268 to 3328. [2021-11-03 04:31:30,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3328 states, 2657 states have (on average 1.6797139631162965) internal successors, (4463), 3327 states have internal predecessors, (4463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:30,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3328 states to 3328 states and 4463 transitions. [2021-11-03 04:31:30,448 INFO L78 Accepts]: Start accepts. Automaton has 3328 states and 4463 transitions. Word has length 75 [2021-11-03 04:31:30,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:31:30,449 INFO L470 AbstractCegarLoop]: Abstraction has 3328 states and 4463 transitions. [2021-11-03 04:31:30,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.1) internal successors, (81), 10 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:30,449 INFO L276 IsEmpty]: Start isEmpty. Operand 3328 states and 4463 transitions. [2021-11-03 04:31:30,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-03 04:31:30,450 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:31:30,450 INFO L513 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:31:30,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-11-03 04:31:30,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-03 04:31:30,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-11-03 04:31:31,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:31:31,057 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr400REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-03 04:31:31,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:31:31,058 INFO L85 PathProgramCache]: Analyzing trace with hash -547693775, now seen corresponding path program 2 times [2021-11-03 04:31:31,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:31:31,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [993206606] [2021-11-03 04:31:31,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:31:31,059 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:31:31,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:31:31,061 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:31:31,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0674a152-68be-4e7c-9cc0-aee8a6891a09/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-03 04:31:32,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-03 04:31:32,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:31:32,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:31:32,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:31:32,204 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 [2021-11-03 04:31:32,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:31:32,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:31:32,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:31:32,295 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-03 04:31:32,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-03 04:31:32,434 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-03 04:31:32,435 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 [2021-11-03 04:31:32,689 INFO L354 Elim1Store]: treesize reduction 229, result has 11.2 percent of original size [2021-11-03 04:31:32,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 66 treesize of output 86 [2021-11-03 04:31:38,415 INFO L354 Elim1Store]: treesize reduction 1963, result has 5.1 percent of original size [2021-11-03 04:31:38,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 39 case distinctions, treesize of input 118 treesize of output 150 [2021-11-03 04:31:48,357 INFO L354 Elim1Store]: treesize reduction 876, result has 0.1 percent of original size [2021-11-03 04:31:48,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 157 treesize of output 67 [2021-11-03 04:31:48,580 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-03 04:31:48,580 INFO L328 TraceCheckSpWp]: Computing backward predicates...