./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 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/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_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 85fe539c4a9811cd5d49f239f4680cc0b3752a2958e9f287c34e302b923af4f9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:32:53,891 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:32:53,893 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:32:53,927 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:32:53,934 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:32:53,940 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:32:53,942 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:32:53,946 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:32:53,950 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:32:53,956 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:32:53,957 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:32:53,960 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:32:53,961 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:32:53,964 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:32:53,966 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:32:53,969 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:32:53,971 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:32:53,972 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:32:53,976 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:32:53,984 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:32:53,986 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:32:53,987 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:32:53,991 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:32:53,992 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:32:53,996 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:32:53,996 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:32:53,996 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:32:53,998 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:32:53,999 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:32:54,001 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:32:54,002 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:32:54,003 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:32:54,005 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:32:54,006 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:32:54,008 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:32:54,008 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:32:54,009 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:32:54,009 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:32:54,010 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:32:54,011 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:32:54,012 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:32:54,012 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-20 23:32:54,058 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:32:54,059 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:32:54,059 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:32:54,060 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:32:54,061 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:32:54,061 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:32:54,062 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:32:54,062 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:32:54,062 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:32:54,062 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:32:54,063 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:32:54,064 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:32:54,064 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:32:54,064 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:32:54,064 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:32:54,065 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:32:54,065 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:32:54,065 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:32:54,066 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 23:32:54,066 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 23:32:54,066 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:32:54,067 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:32:54,067 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 23:32:54,067 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:32:54,067 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:32:54,067 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:32:54,068 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 23:32:54,068 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 23:32:54,068 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 23:32:54,069 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:32:54,069 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 23:32:54,069 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:32:54,069 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:32:54,069 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:32:54,070 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:32:54,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:32:54,070 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:32:54,070 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:32:54,071 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:32:54,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:32:54,072 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:32:54,073 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:32:54,073 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_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 85fe539c4a9811cd5d49f239f4680cc0b3752a2958e9f287c34e302b923af4f9 [2021-11-20 23:32:54,404 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:32:54,425 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:32:54,428 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:32:54,430 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:32:54,430 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:32:54,432 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-1.i [2021-11-20 23:32:54,497 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/data/2c9db3a97/4abc17f5d6f946dda96631e87e9ed385/FLAG2cc5c19ea [2021-11-20 23:32:55,202 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:32:55,204 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-1.i [2021-11-20 23:32:55,226 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/data/2c9db3a97/4abc17f5d6f946dda96631e87e9ed385/FLAG2cc5c19ea [2021-11-20 23:32:55,392 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/data/2c9db3a97/4abc17f5d6f946dda96631e87e9ed385 [2021-11-20 23:32:55,395 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:32:55,396 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:32:55,398 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:32:55,399 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:32:55,403 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:32:55,404 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:32:55" (1/1) ... [2021-11-20 23:32:55,405 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@685444d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:55, skipping insertion in model container [2021-11-20 23:32:55,406 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:32:55" (1/1) ... [2021-11-20 23:32:55,413 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:32:55,469 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:32:55,933 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-1.i[33022,33035] [2021-11-20 23:32:56,228 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:32:56,243 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) [2021-11-20 23:32:56,244 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@544c711b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:56, skipping insertion in model container [2021-11-20 23:32:56,244 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:32:56,245 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-20 23:32:56,247 INFO L158 Benchmark]: Toolchain (without parser) took 849.11ms. Allocated memory is still 121.6MB. Free memory was 76.7MB in the beginning and 76.8MB in the end (delta: -103.8kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-20 23:32:56,248 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 121.6MB. Free memory is still 96.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 23:32:56,250 INFO L158 Benchmark]: CACSL2BoogieTranslator took 846.27ms. Allocated memory is still 121.6MB. Free memory was 76.5MB in the beginning and 76.8MB in the end (delta: -328.5kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-20 23:32:56,252 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 121.6MB. Free memory is still 96.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 846.27ms. Allocated memory is still 121.6MB. Free memory was 76.5MB in the beginning and 76.8MB in the end (delta: -328.5kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * 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_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/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_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 85fe539c4a9811cd5d49f239f4680cc0b3752a2958e9f287c34e302b923af4f9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:32:58,465 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:32:58,469 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:32:58,517 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:32:58,517 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:32:58,522 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:32:58,525 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:32:58,535 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:32:58,538 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:32:58,549 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:32:58,550 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:32:58,553 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:32:58,554 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:32:58,556 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:32:58,559 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:32:58,561 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:32:58,563 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:32:58,564 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:32:58,570 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:32:58,572 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:32:58,577 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:32:58,579 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:32:58,582 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:32:58,584 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:32:58,594 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:32:58,594 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:32:58,595 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:32:58,597 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:32:58,598 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:32:58,599 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:32:58,600 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:32:58,601 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:32:58,603 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:32:58,604 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:32:58,605 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:32:58,606 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:32:58,607 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:32:58,607 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:32:58,608 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:32:58,610 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:32:58,611 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:32:58,612 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-20 23:32:58,664 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:32:58,664 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:32:58,665 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:32:58,665 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:32:58,666 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:32:58,666 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:32:58,667 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:32:58,667 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:32:58,667 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:32:58,667 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:32:58,669 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:32:58,669 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:32:58,670 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 23:32:58,671 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 23:32:58,671 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:32:58,671 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:32:58,672 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 23:32:58,672 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:32:58,672 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:32:58,672 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:32:58,672 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 23:32:58,673 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 23:32:58,673 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 23:32:58,673 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:32:58,673 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 23:32:58,674 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-20 23:32:58,674 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-20 23:32:58,674 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:32:58,674 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:32:58,675 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:32:58,675 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 23:32:58,675 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:32:58,676 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:32:58,676 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:32:58,676 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:32:58,676 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-20 23:32:58,677 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-20 23:32:58,677 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:32:58,677 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:32:58,677 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_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 85fe539c4a9811cd5d49f239f4680cc0b3752a2958e9f287c34e302b923af4f9 [2021-11-20 23:32:59,088 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:32:59,125 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:32:59,128 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:32:59,129 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:32:59,130 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:32:59,132 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-1.i [2021-11-20 23:32:59,202 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/data/1101502d1/1d2c459c1eaf4d8d93363d6aa8713bd5/FLAGf551e2c92 [2021-11-20 23:33:00,011 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:33:00,012 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-1.i [2021-11-20 23:33:00,039 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/data/1101502d1/1d2c459c1eaf4d8d93363d6aa8713bd5/FLAGf551e2c92 [2021-11-20 23:33:00,134 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/data/1101502d1/1d2c459c1eaf4d8d93363d6aa8713bd5 [2021-11-20 23:33:00,136 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:33:00,138 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:33:00,140 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:33:00,141 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:33:00,147 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:33:00,148 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:33:00" (1/1) ... [2021-11-20 23:33:00,149 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ea89abc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:00, skipping insertion in model container [2021-11-20 23:33:00,149 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:33:00" (1/1) ... [2021-11-20 23:33:00,157 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:33:00,221 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:33:00,691 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-1.i[33022,33035] [2021-11-20 23:33:00,998 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:33:01,015 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-20 23:33:01,035 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:33:01,086 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-1.i[33022,33035] [2021-11-20 23:33:01,230 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:33:01,236 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:33:01,261 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-1.i[33022,33035] [2021-11-20 23:33:01,373 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:33:01,416 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:33:01,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:01 WrapperNode [2021-11-20 23:33:01,417 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:33:01,418 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:33:01,418 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:33:01,418 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:33:01,425 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:01" (1/1) ... [2021-11-20 23:33:01,475 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:01" (1/1) ... [2021-11-20 23:33:01,565 INFO L137 Inliner]: procedures = 180, calls = 524, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2184 [2021-11-20 23:33:01,566 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:33:01,566 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:33:01,567 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:33:01,567 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:33:01,575 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:01" (1/1) ... [2021-11-20 23:33:01,576 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:01" (1/1) ... [2021-11-20 23:33:01,597 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:01" (1/1) ... [2021-11-20 23:33:01,600 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:01" (1/1) ... [2021-11-20 23:33:01,740 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:01" (1/1) ... [2021-11-20 23:33:01,762 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:01" (1/1) ... [2021-11-20 23:33:01,770 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:01" (1/1) ... [2021-11-20 23:33:01,786 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:33:01,787 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:33:01,787 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:33:01,787 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:33:01,788 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:01" (1/1) ... [2021-11-20 23:33:01,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:33:01,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:33:01,825 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:33:01,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:33:01,873 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-20 23:33:01,874 INFO L130 BoogieDeclarations]: Found specification of procedure test_int_int [2021-11-20 23:33:01,874 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int_int [2021-11-20 23:33:01,874 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-20 23:33:01,874 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 23:33:01,874 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 23:33:01,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-20 23:33:01,875 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-20 23:33:01,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 23:33:01,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:33:01,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 23:33:01,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 23:33:01,876 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-20 23:33:01,876 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 23:33:01,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 23:33:01,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-20 23:33:01,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-20 23:33:01,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:33:01,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:33:02,191 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:33:02,193 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:33:02,197 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-20 23:33:12,307 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:33:12,334 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:33:12,334 INFO L301 CfgBuilder]: Removed 151 assume(true) statements. [2021-11-20 23:33:12,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:33:12 BoogieIcfgContainer [2021-11-20 23:33:12,340 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:33:12,341 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:33:12,342 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:33:12,345 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:33:12,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:33:00" (1/3) ... [2021-11-20 23:33:12,346 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e8c481b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:33:12, skipping insertion in model container [2021-11-20 23:33:12,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:33:01" (2/3) ... [2021-11-20 23:33:12,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e8c481b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:33:12, skipping insertion in model container [2021-11-20 23:33:12,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:33:12" (3/3) ... [2021-11-20 23:33:12,348 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SFH_test10-1.i [2021-11-20 23:33:12,354 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:33:12,355 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 990 error locations. [2021-11-20 23:33:12,403 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:33:12,411 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 [2021-11-20 23:33:12,411 INFO L340 AbstractCegarLoop]: Starting to check reachability of 990 error locations. [2021-11-20 23:33:12,468 INFO L276 IsEmpty]: Start isEmpty. Operand has 2060 states, 1058 states have (on average 2.2041587901701325) internal successors, (2332), 2046 states have internal predecessors, (2332), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-20 23:33:12,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-20 23:33:12,475 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:33:12,476 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-20 23:33:12,476 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-20 23:33:12,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:33:12,482 INFO L85 PathProgramCache]: Analyzing trace with hash 66598, now seen corresponding path program 1 times [2021-11-20 23:33:12,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:33:12,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1890655412] [2021-11-20 23:33:12,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:33:12,496 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:33:12,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:33:12,503 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:33:12,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 23:33:12,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:33:12,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 23:33:12,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:33:12,769 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 [2021-11-20 23:33:12,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:33:12,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:33:12,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:33:12,802 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:33:12,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1890655412] [2021-11-20 23:33:12,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1890655412] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:33:12,803 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:33:12,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-20 23:33:12,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005828445] [2021-11-20 23:33:12,806 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:33:12,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:33:12,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:33:12,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:33:12,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:33:12,845 INFO L87 Difference]: Start difference. First operand has 2060 states, 1058 states have (on average 2.2041587901701325) internal successors, (2332), 2046 states have internal predecessors, (2332), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) 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) [2021-11-20 23:33:17,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:33:17,255 INFO L93 Difference]: Finished difference Result 2558 states and 2724 transitions. [2021-11-20 23:33:17,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:33:17,258 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 [2021-11-20 23:33:17,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:33:17,303 INFO L225 Difference]: With dead ends: 2558 [2021-11-20 23:33:17,303 INFO L226 Difference]: Without dead ends: 2556 [2021-11-20 23:33:17,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:33:17,311 INFO L933 BasicCegarLoop]: 1273 mSDtfsCounter, 1951 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1961 SdHoareTripleChecker+Valid, 1646 SdHoareTripleChecker+Invalid, 1298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:33:17,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1961 Valid, 1646 Invalid, 1298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1275 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-11-20 23:33:17,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2021-11-20 23:33:17,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 2202. [2021-11-20 23:33:17,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2202 states, 1224 states have (on average 2.037581699346405) internal successors, (2494), 2186 states have internal predecessors, (2494), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 23:33:17,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 2526 transitions. [2021-11-20 23:33:17,470 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 2526 transitions. Word has length 3 [2021-11-20 23:33:17,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:33:17,471 INFO L470 AbstractCegarLoop]: Abstraction has 2202 states and 2526 transitions. [2021-11-20 23:33:17,471 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) [2021-11-20 23:33:17,471 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 2526 transitions. [2021-11-20 23:33:17,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-20 23:33:17,472 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:33:17,472 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-20 23:33:17,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:33:17,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:33:17,685 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-20 23:33:17,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:33:17,688 INFO L85 PathProgramCache]: Analyzing trace with hash 66599, now seen corresponding path program 1 times [2021-11-20 23:33:17,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:33:17,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2035489515] [2021-11-20 23:33:17,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:33:17,690 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:33:17,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:33:17,692 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:33:17,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-20 23:33:17,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:33:17,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:33:17,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:33:17,893 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 [2021-11-20 23:33:17,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:33:17,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:33:17,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:33:17,962 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:33:17,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2035489515] [2021-11-20 23:33:17,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2035489515] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:33:17,967 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:33:17,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-20 23:33:17,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121180219] [2021-11-20 23:33:17,968 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:33:17,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:33:17,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:33:17,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:33:17,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:33:17,972 INFO L87 Difference]: Start difference. First operand 2202 states and 2526 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) [2021-11-20 23:33:28,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:33:28,068 INFO L93 Difference]: Finished difference Result 3303 states and 3727 transitions. [2021-11-20 23:33:28,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:33:28,069 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 [2021-11-20 23:33:28,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:33:28,088 INFO L225 Difference]: With dead ends: 3303 [2021-11-20 23:33:28,088 INFO L226 Difference]: Without dead ends: 3303 [2021-11-20 23:33:28,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:33:28,090 INFO L933 BasicCegarLoop]: 1568 mSDtfsCounter, 2250 mSDsluCounter, 1724 mSDsCounter, 0 mSdLazyCounter, 2121 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2258 SdHoareTripleChecker+Valid, 3292 SdHoareTripleChecker+Invalid, 2144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2021-11-20 23:33:28,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2258 Valid, 3292 Invalid, 2144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 2121 Invalid, 0 Unknown, 0 Unchecked, 9.9s Time] [2021-11-20 23:33:28,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3303 states. [2021-11-20 23:33:28,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3303 to 2366. [2021-11-20 23:33:28,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2366 states, 1400 states have (on average 2.025714285714286) internal successors, (2836), 2350 states have internal predecessors, (2836), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 23:33:28,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2366 states to 2366 states and 2868 transitions. [2021-11-20 23:33:28,157 INFO L78 Accepts]: Start accepts. Automaton has 2366 states and 2868 transitions. Word has length 3 [2021-11-20 23:33:28,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:33:28,157 INFO L470 AbstractCegarLoop]: Abstraction has 2366 states and 2868 transitions. [2021-11-20 23:33:28,157 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) [2021-11-20 23:33:28,158 INFO L276 IsEmpty]: Start isEmpty. Operand 2366 states and 2868 transitions. [2021-11-20 23:33:28,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-20 23:33:28,158 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:33:28,158 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:33:28,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-20 23:33:28,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:33:28,371 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-20 23:33:28,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:33:28,372 INFO L85 PathProgramCache]: Analyzing trace with hash -305791726, now seen corresponding path program 1 times [2021-11-20 23:33:28,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:33:28,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1052821336] [2021-11-20 23:33:28,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:33:28,373 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:33:28,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:33:28,375 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:33:28,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-20 23:33:28,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:33:28,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 23:33:28,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:33:28,571 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 [2021-11-20 23:33:28,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:33:28,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:33:28,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:33:28,625 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:33:28,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1052821336] [2021-11-20 23:33:28,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1052821336] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:33:28,626 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:33:28,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-20 23:33:28,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881747512] [2021-11-20 23:33:28,627 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:33:28,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:33:28,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:33:28,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:33:28,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:33:28,630 INFO L87 Difference]: Start difference. First operand 2366 states and 2868 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) [2021-11-20 23:33:32,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:33:32,787 INFO L93 Difference]: Finished difference Result 3104 states and 3606 transitions. [2021-11-20 23:33:32,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:33:32,788 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 [2021-11-20 23:33:32,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:33:32,808 INFO L225 Difference]: With dead ends: 3104 [2021-11-20 23:33:32,808 INFO L226 Difference]: Without dead ends: 3104 [2021-11-20 23:33:32,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:33:32,810 INFO L933 BasicCegarLoop]: 1950 mSDtfsCounter, 1987 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 1373 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1997 SdHoareTripleChecker+Valid, 2597 SdHoareTripleChecker+Invalid, 1475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:33:32,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1997 Valid, 2597 Invalid, 1475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1373 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-11-20 23:33:32,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3104 states. [2021-11-20 23:33:32,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3104 to 2275. [2021-11-20 23:33:32,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2275 states, 1400 states have (on average 1.9364285714285714) internal successors, (2711), 2259 states have internal predecessors, (2711), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 23:33:32,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2275 states to 2275 states and 2743 transitions. [2021-11-20 23:33:32,874 INFO L78 Accepts]: Start accepts. Automaton has 2275 states and 2743 transitions. Word has length 8 [2021-11-20 23:33:32,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:33:32,874 INFO L470 AbstractCegarLoop]: Abstraction has 2275 states and 2743 transitions. [2021-11-20 23:33:32,875 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) [2021-11-20 23:33:32,875 INFO L276 IsEmpty]: Start isEmpty. Operand 2275 states and 2743 transitions. [2021-11-20 23:33:32,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-20 23:33:32,875 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:33:32,876 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:33:32,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-20 23:33:33,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:33:33,085 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-20 23:33:33,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:33:33,086 INFO L85 PathProgramCache]: Analyzing trace with hash -305791725, now seen corresponding path program 1 times [2021-11-20 23:33:33,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:33:33,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1148208580] [2021-11-20 23:33:33,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:33:33,087 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:33:33,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:33:33,092 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:33:33,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-20 23:33:33,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:33:33,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:33:33,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:33:33,297 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 [2021-11-20 23:33:33,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:33:33,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:33:33,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:33:33,439 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:33:33,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1148208580] [2021-11-20 23:33:33,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1148208580] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:33:33,439 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:33:33,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-20 23:33:33,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377018832] [2021-11-20 23:33:33,440 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:33:33,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:33:33,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:33:33,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:33:33,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:33:33,441 INFO L87 Difference]: Start difference. First operand 2275 states and 2743 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) [2021-11-20 23:33:42,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:33:42,267 INFO L93 Difference]: Finished difference Result 3232 states and 3635 transitions. [2021-11-20 23:33:42,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:33:42,271 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 [2021-11-20 23:33:42,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:33:42,286 INFO L225 Difference]: With dead ends: 3232 [2021-11-20 23:33:42,287 INFO L226 Difference]: Without dead ends: 3232 [2021-11-20 23:33:42,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:33:42,288 INFO L933 BasicCegarLoop]: 2282 mSDtfsCounter, 1443 mSDsluCounter, 1958 mSDsCounter, 0 mSdLazyCounter, 2376 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1449 SdHoareTripleChecker+Valid, 4240 SdHoareTripleChecker+Invalid, 2403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 2376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:33:42,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1449 Valid, 4240 Invalid, 2403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 2376 Invalid, 0 Unknown, 0 Unchecked, 8.7s Time] [2021-11-20 23:33:42,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3232 states. [2021-11-20 23:33:42,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3232 to 2267. [2021-11-20 23:33:42,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2267 states, 1402 states have (on average 1.9194008559201141) internal successors, (2691), 2251 states have internal predecessors, (2691), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 23:33:42,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2267 states to 2267 states and 2723 transitions. [2021-11-20 23:33:42,348 INFO L78 Accepts]: Start accepts. Automaton has 2267 states and 2723 transitions. Word has length 8 [2021-11-20 23:33:42,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:33:42,348 INFO L470 AbstractCegarLoop]: Abstraction has 2267 states and 2723 transitions. [2021-11-20 23:33:42,348 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) [2021-11-20 23:33:42,348 INFO L276 IsEmpty]: Start isEmpty. Operand 2267 states and 2723 transitions. [2021-11-20 23:33:42,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 23:33:42,349 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:33:42,349 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:33:42,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-20 23:33:42,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:33:42,561 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr658REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-20 23:33:42,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:33:42,561 INFO L85 PathProgramCache]: Analyzing trace with hash -690352907, now seen corresponding path program 1 times [2021-11-20 23:33:42,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:33:42,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [635177286] [2021-11-20 23:33:42,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:33:42,562 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:33:42,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:33:42,563 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:33:42,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-20 23:33:42,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:33:42,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 23:33:42,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:33:42,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:33:42,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:33:42,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:33:42,772 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:33:42,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [635177286] [2021-11-20 23:33:42,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [635177286] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:33:42,772 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:33:42,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-20 23:33:42,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918705494] [2021-11-20 23:33:42,773 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:33:42,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:33:42,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:33:42,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:33:42,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:33:42,774 INFO L87 Difference]: Start difference. First operand 2267 states and 2723 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) [2021-11-20 23:33:42,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:33:42,832 INFO L93 Difference]: Finished difference Result 2225 states and 2680 transitions. [2021-11-20 23:33:42,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:33:42,833 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 [2021-11-20 23:33:42,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:33:42,844 INFO L225 Difference]: With dead ends: 2225 [2021-11-20 23:33:42,845 INFO L226 Difference]: Without dead ends: 2225 [2021-11-20 23:33:42,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:33:42,846 INFO L933 BasicCegarLoop]: 2000 mSDtfsCounter, 1592 mSDsluCounter, 1210 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1596 SdHoareTripleChecker+Valid, 3210 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:33:42,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1596 Valid, 3210 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:33:42,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2021-11-20 23:33:42,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 2225. [2021-11-20 23:33:42,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2225 states, 1384 states have (on average 1.9132947976878614) internal successors, (2648), 2209 states have internal predecessors, (2648), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 23:33:42,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2225 states to 2225 states and 2680 transitions. [2021-11-20 23:33:42,900 INFO L78 Accepts]: Start accepts. Automaton has 2225 states and 2680 transitions. Word has length 11 [2021-11-20 23:33:42,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:33:42,901 INFO L470 AbstractCegarLoop]: Abstraction has 2225 states and 2680 transitions. [2021-11-20 23:33:42,901 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) [2021-11-20 23:33:42,901 INFO L276 IsEmpty]: Start isEmpty. Operand 2225 states and 2680 transitions. [2021-11-20 23:33:42,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 23:33:42,902 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:33:42,902 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:33:42,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-20 23:33:43,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:33:43,118 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr682REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-20 23:33:43,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:33:43,119 INFO L85 PathProgramCache]: Analyzing trace with hash -2004126129, now seen corresponding path program 1 times [2021-11-20 23:33:43,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:33:43,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [786880394] [2021-11-20 23:33:43,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:33:43,120 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:33:43,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:33:43,121 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:33:43,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-20 23:33:43,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:33:43,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:33:43,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:33:43,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:33:43,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:33:43,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:33:43,387 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:33:43,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [786880394] [2021-11-20 23:33:43,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [786880394] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:33:43,388 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:33:43,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-20 23:33:43,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020120402] [2021-11-20 23:33:43,389 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:33:43,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:33:43,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:33:43,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:33:43,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:33:43,390 INFO L87 Difference]: Start difference. First operand 2225 states and 2680 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) [2021-11-20 23:33:43,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:33:43,514 INFO L93 Difference]: Finished difference Result 2204 states and 2652 transitions. [2021-11-20 23:33:43,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:33:43,514 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 [2021-11-20 23:33:43,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:33:43,527 INFO L225 Difference]: With dead ends: 2204 [2021-11-20 23:33:43,527 INFO L226 Difference]: Without dead ends: 2204 [2021-11-20 23:33:43,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:33:43,530 INFO L933 BasicCegarLoop]: 1955 mSDtfsCounter, 1524 mSDsluCounter, 3158 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1528 SdHoareTripleChecker+Valid, 5113 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:33:43,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1528 Valid, 5113 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:33:43,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2021-11-20 23:33:43,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 2203. [2021-11-20 23:33:43,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2203 states, 1376 states have (on average 1.903343023255814) internal successors, (2619), 2187 states have internal predecessors, (2619), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 23:33:43,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2203 states to 2203 states and 2651 transitions. [2021-11-20 23:33:43,594 INFO L78 Accepts]: Start accepts. Automaton has 2203 states and 2651 transitions. Word has length 13 [2021-11-20 23:33:43,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:33:43,595 INFO L470 AbstractCegarLoop]: Abstraction has 2203 states and 2651 transitions. [2021-11-20 23:33:43,595 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) [2021-11-20 23:33:43,595 INFO L276 IsEmpty]: Start isEmpty. Operand 2203 states and 2651 transitions. [2021-11-20 23:33:43,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-20 23:33:43,597 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:33:43,597 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:33:43,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-20 23:33:43,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:33:43,808 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-20 23:33:43,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:33:43,809 INFO L85 PathProgramCache]: Analyzing trace with hash 445820063, now seen corresponding path program 1 times [2021-11-20 23:33:43,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:33:43,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [947537701] [2021-11-20 23:33:43,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:33:43,811 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:33:43,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:33:43,812 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:33:43,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-20 23:33:43,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:33:43,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 23:33:43,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:33:44,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:33:44,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:33:44,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:33:44,086 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:33:44,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [947537701] [2021-11-20 23:33:44,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [947537701] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:33:44,086 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:33:44,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-20 23:33:44,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577414535] [2021-11-20 23:33:44,086 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:33:44,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:33:44,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:33:44,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:33:44,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:33:44,089 INFO L87 Difference]: Start difference. First operand 2203 states and 2651 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) [2021-11-20 23:33:44,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:33:44,171 INFO L93 Difference]: Finished difference Result 3480 states and 4065 transitions. [2021-11-20 23:33:44,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:33:44,172 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 [2021-11-20 23:33:44,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:33:44,189 INFO L225 Difference]: With dead ends: 3480 [2021-11-20 23:33:44,189 INFO L226 Difference]: Without dead ends: 3480 [2021-11-20 23:33:44,190 INFO L932 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 [2021-11-20 23:33:44,190 INFO L933 BasicCegarLoop]: 3067 mSDtfsCounter, 3762 mSDsluCounter, 1408 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3772 SdHoareTripleChecker+Valid, 4475 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:33:44,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3772 Valid, 4475 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:33:44,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3480 states. [2021-11-20 23:33:44,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3480 to 2161. [2021-11-20 23:33:44,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2161 states, 1358 states have (on average 1.8969072164948453) internal successors, (2576), 2145 states have internal predecessors, (2576), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 23:33:44,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2161 states to 2161 states and 2608 transitions. [2021-11-20 23:33:44,246 INFO L78 Accepts]: Start accepts. Automaton has 2161 states and 2608 transitions. Word has length 20 [2021-11-20 23:33:44,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:33:44,247 INFO L470 AbstractCegarLoop]: Abstraction has 2161 states and 2608 transitions. [2021-11-20 23:33:44,247 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) [2021-11-20 23:33:44,247 INFO L276 IsEmpty]: Start isEmpty. Operand 2161 states and 2608 transitions. [2021-11-20 23:33:44,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-20 23:33:44,248 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:33:44,248 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:33:44,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-20 23:33:44,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:33:44,460 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr334REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-20 23:33:44,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:33:44,461 INFO L85 PathProgramCache]: Analyzing trace with hash 591123743, now seen corresponding path program 1 times [2021-11-20 23:33:44,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:33:44,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1309824991] [2021-11-20 23:33:44,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:33:44,462 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:33:44,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:33:44,463 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:33:44,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-20 23:33:44,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:33:44,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 23:33:44,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:33:44,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:33:44,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:33:44,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:33:44,734 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:33:44,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1309824991] [2021-11-20 23:33:44,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1309824991] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:33:44,734 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:33:44,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-20 23:33:44,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036386355] [2021-11-20 23:33:44,735 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:33:44,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:33:44,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:33:44,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:33:44,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:33:44,735 INFO L87 Difference]: Start difference. First operand 2161 states and 2608 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) [2021-11-20 23:33:44,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:33:44,818 INFO L93 Difference]: Finished difference Result 3353 states and 3884 transitions. [2021-11-20 23:33:44,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:33:44,819 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 [2021-11-20 23:33:44,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:33:44,835 INFO L225 Difference]: With dead ends: 3353 [2021-11-20 23:33:44,836 INFO L226 Difference]: Without dead ends: 3353 [2021-11-20 23:33:44,836 INFO L932 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 [2021-11-20 23:33:44,837 INFO L933 BasicCegarLoop]: 2975 mSDtfsCounter, 3676 mSDsluCounter, 1358 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3686 SdHoareTripleChecker+Valid, 4333 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:33:44,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3686 Valid, 4333 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:33:44,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3353 states. [2021-11-20 23:33:44,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3353 to 2083. [2021-11-20 23:33:44,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2083 states, 1304 states have (on average 1.8765337423312884) internal successors, (2447), 2067 states have internal predecessors, (2447), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 23:33:44,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 2479 transitions. [2021-11-20 23:33:44,889 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 2479 transitions. Word has length 20 [2021-11-20 23:33:44,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:33:44,889 INFO L470 AbstractCegarLoop]: Abstraction has 2083 states and 2479 transitions. [2021-11-20 23:33:44,889 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) [2021-11-20 23:33:44,890 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 2479 transitions. [2021-11-20 23:33:44,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-20 23:33:44,891 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:33:44,891 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:33:44,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-20 23:33:45,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:33:45,104 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-20 23:33:45,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:33:45,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1063651591, now seen corresponding path program 1 times [2021-11-20 23:33:45,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:33:45,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [429739029] [2021-11-20 23:33:45,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:33:45,106 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:33:45,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:33:45,107 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:33:45,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-20 23:33:45,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:33:45,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:33:45,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:33:45,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:33:45,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:33:45,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:33:45,420 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:33:45,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [429739029] [2021-11-20 23:33:45,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [429739029] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:33:45,421 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:33:45,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-20 23:33:45,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667518990] [2021-11-20 23:33:45,421 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:33:45,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:33:45,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:33:45,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:33:45,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:33:45,423 INFO L87 Difference]: Start difference. First operand 2083 states and 2479 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) [2021-11-20 23:33:45,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:33:45,541 INFO L93 Difference]: Finished difference Result 3339 states and 3865 transitions. [2021-11-20 23:33:45,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:33:45,541 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 [2021-11-20 23:33:45,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:33:45,557 INFO L225 Difference]: With dead ends: 3339 [2021-11-20 23:33:45,557 INFO L226 Difference]: Without dead ends: 3339 [2021-11-20 23:33:45,557 INFO L932 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 [2021-11-20 23:33:45,558 INFO L933 BasicCegarLoop]: 3159 mSDtfsCounter, 3608 mSDsluCounter, 4517 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3618 SdHoareTripleChecker+Valid, 7676 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:33:45,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3618 Valid, 7676 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:33:45,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3339 states. [2021-11-20 23:33:45,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3339 to 2061. [2021-11-20 23:33:45,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2061 states, 1296 states have (on average 1.8657407407407407) internal successors, (2418), 2045 states have internal predecessors, (2418), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 23:33:45,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2061 states to 2061 states and 2450 transitions. [2021-11-20 23:33:45,608 INFO L78 Accepts]: Start accepts. Automaton has 2061 states and 2450 transitions. Word has length 22 [2021-11-20 23:33:45,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:33:45,609 INFO L470 AbstractCegarLoop]: Abstraction has 2061 states and 2450 transitions. [2021-11-20 23:33:45,609 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) [2021-11-20 23:33:45,609 INFO L276 IsEmpty]: Start isEmpty. Operand 2061 states and 2450 transitions. [2021-11-20 23:33:45,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-20 23:33:45,610 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:33:45,610 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:33:45,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-11-20 23:33:45,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:33:45,825 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr359REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-20 23:33:45,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:33:45,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1134259450, now seen corresponding path program 1 times [2021-11-20 23:33:45,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:33:45,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [572405628] [2021-11-20 23:33:45,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:33:45,827 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:33:45,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:33:45,827 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:33:45,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-20 23:33:45,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:33:45,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:33:46,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:33:46,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:33:46,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:33:46,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:33:46,102 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:33:46,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [572405628] [2021-11-20 23:33:46,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [572405628] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:33:46,103 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:33:46,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-20 23:33:46,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733558088] [2021-11-20 23:33:46,103 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:33:46,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:33:46,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:33:46,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:33:46,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:33:46,105 INFO L87 Difference]: Start difference. First operand 2061 states and 2450 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) [2021-11-20 23:33:46,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:33:46,250 INFO L93 Difference]: Finished difference Result 3274 states and 3742 transitions. [2021-11-20 23:33:46,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:33:46,251 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 [2021-11-20 23:33:46,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:33:46,263 INFO L225 Difference]: With dead ends: 3274 [2021-11-20 23:33:46,263 INFO L226 Difference]: Without dead ends: 3274 [2021-11-20 23:33:46,263 INFO L932 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 [2021-11-20 23:33:46,264 INFO L933 BasicCegarLoop]: 3082 mSDtfsCounter, 3538 mSDsluCounter, 4398 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3548 SdHoareTripleChecker+Valid, 7480 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:33:46,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3548 Valid, 7480 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:33:46,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3274 states. [2021-11-20 23:33:46,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3274 to 2023. [2021-11-20 23:33:46,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2023 states, 1272 states have (on average 1.8325471698113207) internal successors, (2331), 2007 states have internal predecessors, (2331), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 23:33:46,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2023 states to 2023 states and 2363 transitions. [2021-11-20 23:33:46,313 INFO L78 Accepts]: Start accepts. Automaton has 2023 states and 2363 transitions. Word has length 22 [2021-11-20 23:33:46,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:33:46,314 INFO L470 AbstractCegarLoop]: Abstraction has 2023 states and 2363 transitions. [2021-11-20 23:33:46,314 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) [2021-11-20 23:33:46,314 INFO L276 IsEmpty]: Start isEmpty. Operand 2023 states and 2363 transitions. [2021-11-20 23:33:46,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-20 23:33:46,315 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:33:46,315 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:33:46,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-20 23:33:46,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:33:46,531 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr696REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-20 23:33:46,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:33:46,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1056519613, now seen corresponding path program 1 times [2021-11-20 23:33:46,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:33:46,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1691687878] [2021-11-20 23:33:46,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:33:46,533 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:33:46,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:33:46,534 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:33:46,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-20 23:33:46,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:33:46,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:33:46,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:33:46,724 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 [2021-11-20 23:33:46,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:33:46,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:33:46,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:33:46,947 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:33:46,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1691687878] [2021-11-20 23:33:46,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1691687878] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:33:46,948 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:33:46,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-20 23:33:46,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063474118] [2021-11-20 23:33:46,948 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:33:46,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:33:46,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:33:46,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:33:46,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:33:46,950 INFO L87 Difference]: Start difference. First operand 2023 states and 2363 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) [2021-11-20 23:33:50,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:33:50,192 INFO L93 Difference]: Finished difference Result 2298 states and 2540 transitions. [2021-11-20 23:33:50,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:33:50,192 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 [2021-11-20 23:33:50,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:33:50,205 INFO L225 Difference]: With dead ends: 2298 [2021-11-20 23:33:50,206 INFO L226 Difference]: Without dead ends: 2298 [2021-11-20 23:33:50,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:33:50,207 INFO L933 BasicCegarLoop]: 1122 mSDtfsCounter, 2347 mSDsluCounter, 893 mSDsCounter, 0 mSdLazyCounter, 1481 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2353 SdHoareTripleChecker+Valid, 2015 SdHoareTripleChecker+Invalid, 1502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:33:50,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2353 Valid, 2015 Invalid, 1502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1481 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-20 23:33:50,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2021-11-20 23:33:50,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 2019. [2021-11-20 23:33:50,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2019 states, 1272 states have (on average 1.8294025157232705) internal successors, (2327), 2003 states have internal predecessors, (2327), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 23:33:50,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2019 states to 2019 states and 2359 transitions. [2021-11-20 23:33:50,254 INFO L78 Accepts]: Start accepts. Automaton has 2019 states and 2359 transitions. Word has length 27 [2021-11-20 23:33:50,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:33:50,256 INFO L470 AbstractCegarLoop]: Abstraction has 2019 states and 2359 transitions. [2021-11-20 23:33:50,256 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) [2021-11-20 23:33:50,256 INFO L276 IsEmpty]: Start isEmpty. Operand 2019 states and 2359 transitions. [2021-11-20 23:33:50,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-20 23:33:50,260 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:33:50,261 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:33:50,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-20 23:33:50,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:33:50,484 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr697REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-20 23:33:50,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:33:50,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1056519614, now seen corresponding path program 1 times [2021-11-20 23:33:50,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:33:50,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [509840286] [2021-11-20 23:33:50,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:33:50,486 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:33:50,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:33:50,487 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:33:50,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-20 23:33:50,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:33:50,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 23:33:50,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:33:50,680 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 [2021-11-20 23:33:50,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:33:50,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:33:51,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:33:51,355 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:33:51,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [509840286] [2021-11-20 23:33:51,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [509840286] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:33:51,355 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:33:51,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-20 23:33:51,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064568400] [2021-11-20 23:33:51,356 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:33:51,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:33:51,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:33:51,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:33:51,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:33:51,357 INFO L87 Difference]: Start difference. First operand 2019 states and 2359 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) [2021-11-20 23:34:02,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:34:02,532 INFO L93 Difference]: Finished difference Result 2817 states and 3132 transitions. [2021-11-20 23:34:02,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 23:34:02,535 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 [2021-11-20 23:34:02,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:34:02,540 INFO L225 Difference]: With dead ends: 2817 [2021-11-20 23:34:02,540 INFO L226 Difference]: Without dead ends: 2817 [2021-11-20 23:34:02,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:34:02,541 INFO L933 BasicCegarLoop]: 1367 mSDtfsCounter, 4074 mSDsluCounter, 2350 mSDsCounter, 0 mSdLazyCounter, 2673 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4074 SdHoareTripleChecker+Valid, 3717 SdHoareTripleChecker+Invalid, 2702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 2673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:34:02,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4074 Valid, 3717 Invalid, 2702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 2673 Invalid, 0 Unknown, 0 Unchecked, 11.0s Time] [2021-11-20 23:34:02,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2817 states. [2021-11-20 23:34:02,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2817 to 2052. [2021-11-20 23:34:02,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2052 states, 1306 states have (on average 1.8101071975497702) internal successors, (2364), 2036 states have internal predecessors, (2364), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 23:34:02,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2052 states to 2052 states and 2396 transitions. [2021-11-20 23:34:02,586 INFO L78 Accepts]: Start accepts. Automaton has 2052 states and 2396 transitions. Word has length 27 [2021-11-20 23:34:02,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:34:02,586 INFO L470 AbstractCegarLoop]: Abstraction has 2052 states and 2396 transitions. [2021-11-20 23:34:02,586 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) [2021-11-20 23:34:02,587 INFO L276 IsEmpty]: Start isEmpty. Operand 2052 states and 2396 transitions. [2021-11-20 23:34:02,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-20 23:34:02,588 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:34:02,588 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:34:02,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-20 23:34:02,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:34:02,800 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr54REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-20 23:34:02,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:34:02,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1781128551, now seen corresponding path program 1 times [2021-11-20 23:34:02,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:34:02,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1980782881] [2021-11-20 23:34:02,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:34:02,801 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:34:02,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:34:02,802 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:34:02,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-20 23:34:03,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:34:03,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:34:03,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:34:03,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:34:03,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:34:03,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:34:03,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:34:03,302 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:34:03,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1980782881] [2021-11-20 23:34:03,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1980782881] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:34:03,302 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:34:03,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-20 23:34:03,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476429105] [2021-11-20 23:34:03,302 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:34:03,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:34:03,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:34:03,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:34:03,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:34:03,305 INFO L87 Difference]: Start difference. First operand 2052 states and 2396 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) [2021-11-20 23:34:09,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:34:09,099 INFO L93 Difference]: Finished difference Result 3953 states and 4482 transitions. [2021-11-20 23:34:09,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:34:09,099 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 [2021-11-20 23:34:09,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:34:09,106 INFO L225 Difference]: With dead ends: 3953 [2021-11-20 23:34:09,106 INFO L226 Difference]: Without dead ends: 3953 [2021-11-20 23:34:09,106 INFO L932 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 [2021-11-20 23:34:09,107 INFO L933 BasicCegarLoop]: 2430 mSDtfsCounter, 3322 mSDsluCounter, 1806 mSDsCounter, 0 mSdLazyCounter, 2636 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3329 SdHoareTripleChecker+Valid, 4236 SdHoareTripleChecker+Invalid, 2679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:34:09,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3329 Valid, 4236 Invalid, 2679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2636 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2021-11-20 23:34:09,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3953 states. [2021-11-20 23:34:09,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3953 to 2048. [2021-11-20 23:34:09,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2048 states, 1306 states have (on average 1.8070444104134762) internal successors, (2360), 2032 states have internal predecessors, (2360), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 23:34:09,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2048 states to 2048 states and 2392 transitions. [2021-11-20 23:34:09,151 INFO L78 Accepts]: Start accepts. Automaton has 2048 states and 2392 transitions. Word has length 36 [2021-11-20 23:34:09,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:34:09,152 INFO L470 AbstractCegarLoop]: Abstraction has 2048 states and 2392 transitions. [2021-11-20 23:34:09,152 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) [2021-11-20 23:34:09,152 INFO L276 IsEmpty]: Start isEmpty. Operand 2048 states and 2392 transitions. [2021-11-20 23:34:09,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-20 23:34:09,153 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:34:09,154 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:34:09,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-20 23:34:09,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:34:09,365 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr55REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-20 23:34:09,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:34:09,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1781128552, now seen corresponding path program 1 times [2021-11-20 23:34:09,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:34:09,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1273075148] [2021-11-20 23:34:09,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:34:09,366 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:34:09,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:34:09,367 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:34:09,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-20 23:34:09,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:34:09,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 23:34:09,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:34:09,563 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 [2021-11-20 23:34:09,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:34:09,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:34:10,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:34:10,280 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:34:10,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1273075148] [2021-11-20 23:34:10,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1273075148] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:34:10,280 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:34:10,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-20 23:34:10,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802421835] [2021-11-20 23:34:10,281 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:34:10,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:34:10,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:34:10,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:34:10,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:34:10,282 INFO L87 Difference]: Start difference. First operand 2048 states and 2392 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) [2021-11-20 23:34:26,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:34:26,376 INFO L93 Difference]: Finished difference Result 3842 states and 4245 transitions. [2021-11-20 23:34:26,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:34:26,377 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 [2021-11-20 23:34:26,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:34:26,386 INFO L225 Difference]: With dead ends: 3842 [2021-11-20 23:34:26,387 INFO L226 Difference]: Without dead ends: 3842 [2021-11-20 23:34:26,387 INFO L932 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 [2021-11-20 23:34:26,388 INFO L933 BasicCegarLoop]: 2279 mSDtfsCounter, 4734 mSDsluCounter, 3701 mSDsCounter, 0 mSdLazyCounter, 3778 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4739 SdHoareTripleChecker+Valid, 5980 SdHoareTripleChecker+Invalid, 3810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 3778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.9s IncrementalHoareTripleChecker+Time [2021-11-20 23:34:26,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4739 Valid, 5980 Invalid, 3810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 3778 Invalid, 0 Unknown, 0 Unchecked, 15.9s Time] [2021-11-20 23:34:26,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3842 states. [2021-11-20 23:34:26,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3842 to 2044. [2021-11-20 23:34:26,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2044 states, 1306 states have (on average 1.8039816232771821) internal successors, (2356), 2028 states have internal predecessors, (2356), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 23:34:26,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2044 states to 2044 states and 2388 transitions. [2021-11-20 23:34:26,472 INFO L78 Accepts]: Start accepts. Automaton has 2044 states and 2388 transitions. Word has length 36 [2021-11-20 23:34:26,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:34:26,473 INFO L470 AbstractCegarLoop]: Abstraction has 2044 states and 2388 transitions. [2021-11-20 23:34:26,474 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) [2021-11-20 23:34:26,474 INFO L276 IsEmpty]: Start isEmpty. Operand 2044 states and 2388 transitions. [2021-11-20 23:34:26,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-20 23:34:26,475 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:34:26,475 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:34:26,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-20 23:34:26,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:34:26,690 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr372REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-20 23:34:26,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:34:26,690 INFO L85 PathProgramCache]: Analyzing trace with hash -526454297, now seen corresponding path program 1 times [2021-11-20 23:34:26,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:34:26,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [891208648] [2021-11-20 23:34:26,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:34:26,691 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:34:26,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:34:26,693 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:34:26,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-20 23:34:26,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:34:26,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:34:26,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:34:26,887 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 [2021-11-20 23:34:27,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:34:27,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:34:27,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:34:27,131 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:34:27,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [891208648] [2021-11-20 23:34:27,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [891208648] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:34:27,131 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:34:27,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-20 23:34:27,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162188190] [2021-11-20 23:34:27,132 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:34:27,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:34:27,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:34:27,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:34:27,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:34:27,133 INFO L87 Difference]: Start difference. First operand 2044 states and 2388 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) [2021-11-20 23:34:33,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:34:33,120 INFO L93 Difference]: Finished difference Result 4309 states and 4854 transitions. [2021-11-20 23:34:33,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:34:33,121 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 [2021-11-20 23:34:33,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:34:33,130 INFO L225 Difference]: With dead ends: 4309 [2021-11-20 23:34:33,131 INFO L226 Difference]: Without dead ends: 4309 [2021-11-20 23:34:33,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:34:33,132 INFO L933 BasicCegarLoop]: 1943 mSDtfsCounter, 4462 mSDsluCounter, 1995 mSDsCounter, 0 mSdLazyCounter, 2554 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4472 SdHoareTripleChecker+Valid, 3938 SdHoareTripleChecker+Invalid, 2605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-11-20 23:34:33,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4472 Valid, 3938 Invalid, 2605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2554 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2021-11-20 23:34:33,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4309 states. [2021-11-20 23:34:33,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4309 to 2041. [2021-11-20 23:34:33,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2041 states, 1306 states have (on average 1.7955589586523737) internal successors, (2345), 2025 states have internal predecessors, (2345), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 23:34:33,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2041 states to 2041 states and 2377 transitions. [2021-11-20 23:34:33,177 INFO L78 Accepts]: Start accepts. Automaton has 2041 states and 2377 transitions. Word has length 36 [2021-11-20 23:34:33,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:34:33,178 INFO L470 AbstractCegarLoop]: Abstraction has 2041 states and 2377 transitions. [2021-11-20 23:34:33,178 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) [2021-11-20 23:34:33,178 INFO L276 IsEmpty]: Start isEmpty. Operand 2041 states and 2377 transitions. [2021-11-20 23:34:33,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-20 23:34:33,179 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:34:33,179 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:34:33,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-20 23:34:33,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:34:33,392 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr373REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-20 23:34:33,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:34:33,392 INFO L85 PathProgramCache]: Analyzing trace with hash -526454296, now seen corresponding path program 1 times [2021-11-20 23:34:33,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:34:33,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1676742653] [2021-11-20 23:34:33,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:34:33,393 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:34:33,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:34:33,394 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:34:33,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-20 23:34:33,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:34:33,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 23:34:33,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:34:33,635 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 [2021-11-20 23:34:33,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:34:33,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:34:34,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:34:34,482 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:34:34,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1676742653] [2021-11-20 23:34:34,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1676742653] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:34:34,483 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:34:34,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-20 23:34:34,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3777976] [2021-11-20 23:34:34,483 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:34:34,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:34:34,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:34:34,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:34:34,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:34:34,485 INFO L87 Difference]: Start difference. First operand 2041 states and 2377 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) [2021-11-20 23:34:54,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:34:54,615 INFO L93 Difference]: Finished difference Result 4039 states and 4512 transitions. [2021-11-20 23:34:54,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:34:54,616 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 [2021-11-20 23:34:54,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:34:54,626 INFO L225 Difference]: With dead ends: 4039 [2021-11-20 23:34:54,626 INFO L226 Difference]: Without dead ends: 4039 [2021-11-20 23:34:54,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:34:54,627 INFO L933 BasicCegarLoop]: 2187 mSDtfsCounter, 3276 mSDsluCounter, 5358 mSDsCounter, 0 mSdLazyCounter, 5112 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3281 SdHoareTripleChecker+Valid, 7545 SdHoareTripleChecker+Invalid, 5137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 5112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.9s IncrementalHoareTripleChecker+Time [2021-11-20 23:34:54,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3281 Valid, 7545 Invalid, 5137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 5112 Invalid, 0 Unknown, 0 Unchecked, 19.9s Time] [2021-11-20 23:34:54,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4039 states. [2021-11-20 23:34:54,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4039 to 2041. [2021-11-20 23:34:54,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2041 states, 1306 states have (on average 1.7924961715160797) internal successors, (2341), 2025 states have internal predecessors, (2341), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 23:34:54,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2041 states to 2041 states and 2373 transitions. [2021-11-20 23:34:54,670 INFO L78 Accepts]: Start accepts. Automaton has 2041 states and 2373 transitions. Word has length 36 [2021-11-20 23:34:54,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:34:54,670 INFO L470 AbstractCegarLoop]: Abstraction has 2041 states and 2373 transitions. [2021-11-20 23:34:54,670 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) [2021-11-20 23:34:54,671 INFO L276 IsEmpty]: Start isEmpty. Operand 2041 states and 2373 transitions. [2021-11-20 23:34:54,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-20 23:34:54,671 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:34:54,672 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:34:54,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-20 23:34:54,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:34:54,885 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-20 23:34:54,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:34:54,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1782356879, now seen corresponding path program 1 times [2021-11-20 23:34:54,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:34:54,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [995513605] [2021-11-20 23:34:54,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:34:54,886 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:34:54,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:34:54,887 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:34:54,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-20 23:34:55,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:34:55,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:34:55,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:34:55,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:34:55,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:34:55,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:34:55,299 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:34:55,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [995513605] [2021-11-20 23:34:55,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [995513605] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:34:55,299 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:34:55,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-20 23:34:55,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639813904] [2021-11-20 23:34:55,300 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:34:55,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:34:55,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:34:55,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:34:55,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:34:55,301 INFO L87 Difference]: Start difference. First operand 2041 states and 2373 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) [2021-11-20 23:34:55,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:34:55,369 INFO L93 Difference]: Finished difference Result 2035 states and 2359 transitions. [2021-11-20 23:34:55,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:34:55,369 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 [2021-11-20 23:34:55,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:34:55,374 INFO L225 Difference]: With dead ends: 2035 [2021-11-20 23:34:55,374 INFO L226 Difference]: Without dead ends: 2035 [2021-11-20 23:34:55,374 INFO L932 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 [2021-11-20 23:34:55,375 INFO L933 BasicCegarLoop]: 1785 mSDtfsCounter, 749 mSDsluCounter, 2808 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 SdHoareTripleChecker+Valid, 4593 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:34:55,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [753 Valid, 4593 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:34:55,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2035 states. [2021-11-20 23:34:55,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2035 to 2035. [2021-11-20 23:34:55,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2035 states, 1300 states have (on average 1.79) internal successors, (2327), 2019 states have internal predecessors, (2327), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 23:34:55,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2035 states to 2035 states and 2359 transitions. [2021-11-20 23:34:55,436 INFO L78 Accepts]: Start accepts. Automaton has 2035 states and 2359 transitions. Word has length 40 [2021-11-20 23:34:55,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:34:55,436 INFO L470 AbstractCegarLoop]: Abstraction has 2035 states and 2359 transitions. [2021-11-20 23:34:55,437 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) [2021-11-20 23:34:55,437 INFO L276 IsEmpty]: Start isEmpty. Operand 2035 states and 2359 transitions. [2021-11-20 23:34:55,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-20 23:34:55,438 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:34:55,439 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:34:55,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-20 23:34:55,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:34:55,650 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-20 23:34:55,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:34:55,651 INFO L85 PathProgramCache]: Analyzing trace with hash -263031357, now seen corresponding path program 1 times [2021-11-20 23:34:55,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:34:55,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1645140619] [2021-11-20 23:34:55,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:34:55,651 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:34:55,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:34:55,652 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:34:55,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-20 23:34:55,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:34:55,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:34:55,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:34:56,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:34:56,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:34:56,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:34:56,488 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:34:56,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1645140619] [2021-11-20 23:34:56,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1645140619] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:34:56,488 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:34:56,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-20 23:34:56,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121207615] [2021-11-20 23:34:56,488 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:34:56,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:34:56,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:34:56,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:34:56,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:34:56,490 INFO L87 Difference]: Start difference. First operand 2035 states and 2359 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) [2021-11-20 23:34:56,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:34:56,667 INFO L93 Difference]: Finished difference Result 3181 states and 3621 transitions. [2021-11-20 23:34:56,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:34:56,667 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 [2021-11-20 23:34:56,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:34:56,672 INFO L225 Difference]: With dead ends: 3181 [2021-11-20 23:34:56,672 INFO L226 Difference]: Without dead ends: 3181 [2021-11-20 23:34:56,673 INFO L932 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 [2021-11-20 23:34:56,673 INFO L933 BasicCegarLoop]: 1805 mSDtfsCounter, 1176 mSDsluCounter, 1670 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1185 SdHoareTripleChecker+Valid, 3475 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:34:56,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1185 Valid, 3475 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:34:56,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3181 states. [2021-11-20 23:34:56,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3181 to 2636. [2021-11-20 23:34:56,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2636 states, 1899 states have (on average 1.7693522906793049) internal successors, (3360), 2615 states have internal predecessors, (3360), 21 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (21), 18 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-20 23:34:56,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2636 states to 2636 states and 3402 transitions. [2021-11-20 23:34:56,719 INFO L78 Accepts]: Start accepts. Automaton has 2636 states and 3402 transitions. Word has length 48 [2021-11-20 23:34:56,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:34:56,719 INFO L470 AbstractCegarLoop]: Abstraction has 2636 states and 3402 transitions. [2021-11-20 23:34:56,719 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) [2021-11-20 23:34:56,720 INFO L276 IsEmpty]: Start isEmpty. Operand 2636 states and 3402 transitions. [2021-11-20 23:34:56,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-20 23:34:56,721 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:34:56,721 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:34:56,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-20 23:34:56,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:34:56,934 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-20 23:34:56,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:34:56,935 INFO L85 PathProgramCache]: Analyzing trace with hash -435335443, now seen corresponding path program 1 times [2021-11-20 23:34:56,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:34:56,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [625282353] [2021-11-20 23:34:56,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:34:56,936 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:34:56,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:34:56,937 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:34:56,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-20 23:34:57,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:34:57,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:34:57,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:34:57,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:34:57,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:34:57,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:34:57,418 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:34:57,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [625282353] [2021-11-20 23:34:57,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [625282353] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:34:57,418 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:34:57,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-20 23:34:57,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044749469] [2021-11-20 23:34:57,419 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:34:57,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:34:57,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:34:57,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:34:57,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:34:57,420 INFO L87 Difference]: Start difference. First operand 2636 states and 3402 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) [2021-11-20 23:34:57,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:34:57,511 INFO L93 Difference]: Finished difference Result 3591 states and 4413 transitions. [2021-11-20 23:34:57,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:34:57,512 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 [2021-11-20 23:34:57,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:34:57,520 INFO L225 Difference]: With dead ends: 3591 [2021-11-20 23:34:57,520 INFO L226 Difference]: Without dead ends: 3591 [2021-11-20 23:34:57,521 INFO L932 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 [2021-11-20 23:34:57,521 INFO L933 BasicCegarLoop]: 2633 mSDtfsCounter, 1743 mSDsluCounter, 3725 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1753 SdHoareTripleChecker+Valid, 6358 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:34:57,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1753 Valid, 6358 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:34:57,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3591 states. [2021-11-20 23:34:57,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3591 to 2612. [2021-11-20 23:34:57,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2612 states, 1875 states have (on average 1.7706666666666666) internal successors, (3320), 2591 states have internal predecessors, (3320), 21 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (21), 18 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-20 23:34:57,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2612 states to 2612 states and 3362 transitions. [2021-11-20 23:34:57,575 INFO L78 Accepts]: Start accepts. Automaton has 2612 states and 3362 transitions. Word has length 51 [2021-11-20 23:34:57,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:34:57,575 INFO L470 AbstractCegarLoop]: Abstraction has 2612 states and 3362 transitions. [2021-11-20 23:34:57,575 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) [2021-11-20 23:34:57,576 INFO L276 IsEmpty]: Start isEmpty. Operand 2612 states and 3362 transitions. [2021-11-20 23:34:57,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-20 23:34:57,576 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:34:57,577 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:34:57,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-20 23:34:57,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:34:57,795 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-20 23:34:57,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:34:57,796 INFO L85 PathProgramCache]: Analyzing trace with hash -273786554, now seen corresponding path program 1 times [2021-11-20 23:34:57,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:34:57,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [79890647] [2021-11-20 23:34:57,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:34:57,797 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:34:57,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:34:57,798 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:34:57,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-20 23:34:58,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:34:58,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:34:58,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:34:58,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:34:58,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:34:58,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:34:58,285 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:34:58,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [79890647] [2021-11-20 23:34:58,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [79890647] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:34:58,285 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:34:58,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-20 23:34:58,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102279578] [2021-11-20 23:34:58,286 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:34:58,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:34:58,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:34:58,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:34:58,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:34:58,287 INFO L87 Difference]: Start difference. First operand 2612 states and 3362 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) [2021-11-20 23:34:58,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:34:58,354 INFO L93 Difference]: Finished difference Result 3336 states and 3911 transitions. [2021-11-20 23:34:58,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:34:58,354 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 [2021-11-20 23:34:58,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:34:58,360 INFO L225 Difference]: With dead ends: 3336 [2021-11-20 23:34:58,360 INFO L226 Difference]: Without dead ends: 3336 [2021-11-20 23:34:58,361 INFO L932 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 [2021-11-20 23:34:58,361 INFO L933 BasicCegarLoop]: 2896 mSDtfsCounter, 1734 mSDsluCounter, 4038 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1744 SdHoareTripleChecker+Valid, 6934 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:34:58,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1744 Valid, 6934 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:34:58,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2021-11-20 23:34:58,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 2600. [2021-11-20 23:34:58,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2600 states, 1863 states have (on average 1.7713365539452497) internal successors, (3300), 2579 states have internal predecessors, (3300), 21 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (21), 18 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-20 23:34:58,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2600 states to 2600 states and 3342 transitions. [2021-11-20 23:34:58,422 INFO L78 Accepts]: Start accepts. Automaton has 2600 states and 3342 transitions. Word has length 54 [2021-11-20 23:34:58,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:34:58,423 INFO L470 AbstractCegarLoop]: Abstraction has 2600 states and 3342 transitions. [2021-11-20 23:34:58,423 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) [2021-11-20 23:34:58,423 INFO L276 IsEmpty]: Start isEmpty. Operand 2600 states and 3342 transitions. [2021-11-20 23:34:58,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-20 23:34:58,424 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:34:58,424 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:34:58,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-20 23:34:58,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:34:58,641 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-20 23:34:58,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:34:58,642 INFO L85 PathProgramCache]: Analyzing trace with hash -495130849, now seen corresponding path program 1 times [2021-11-20 23:34:58,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:34:58,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [294950280] [2021-11-20 23:34:58,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:34:58,642 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:34:58,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:34:58,644 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:34:58,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-20 23:34:58,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:34:58,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:34:58,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:34:58,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:34:58,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:34:58,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:34:58,934 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-20 23:34:58,935 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 [2021-11-20 23:34:58,990 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-20 23:34:58,990 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 [2021-11-20 23:34:59,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:34:59,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:34:59,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:34:59,243 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:34:59,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [294950280] [2021-11-20 23:34:59,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [294950280] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:34:59,244 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:34:59,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 23:34:59,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611717795] [2021-11-20 23:34:59,244 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:34:59,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:34:59,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:34:59,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:34:59,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:34:59,245 INFO L87 Difference]: Start difference. First operand 2600 states and 3342 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:35:02,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:35:02,139 INFO L93 Difference]: Finished difference Result 2567 states and 3308 transitions. [2021-11-20 23:35:02,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:35:02,140 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-20 23:35:02,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:35:02,143 INFO L225 Difference]: With dead ends: 2567 [2021-11-20 23:35:02,143 INFO L226 Difference]: Without dead ends: 2567 [2021-11-20 23:35:02,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:35:02,145 INFO L933 BasicCegarLoop]: 1686 mSDtfsCounter, 755 mSDsluCounter, 5763 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 759 SdHoareTripleChecker+Valid, 7449 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-20 23:35:02,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [759 Valid, 7449 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-20 23:35:02,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2567 states. [2021-11-20 23:35:02,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2567 to 2566. [2021-11-20 23:35:02,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2566 states, 1829 states have (on average 1.7851284855112084) internal successors, (3265), 2545 states have internal predecessors, (3265), 21 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (21), 18 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-20 23:35:02,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2566 states to 2566 states and 3307 transitions. [2021-11-20 23:35:02,212 INFO L78 Accepts]: Start accepts. Automaton has 2566 states and 3307 transitions. Word has length 57 [2021-11-20 23:35:02,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:35:02,212 INFO L470 AbstractCegarLoop]: Abstraction has 2566 states and 3307 transitions. [2021-11-20 23:35:02,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:35:02,213 INFO L276 IsEmpty]: Start isEmpty. Operand 2566 states and 3307 transitions. [2021-11-20 23:35:02,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-20 23:35:02,214 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:35:02,214 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:35:02,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-20 23:35:02,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:35:02,431 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-20 23:35:02,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:35:02,431 INFO L85 PathProgramCache]: Analyzing trace with hash 122106401, now seen corresponding path program 1 times [2021-11-20 23:35:02,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:35:02,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [804806488] [2021-11-20 23:35:02,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:35:02,432 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:35:02,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:35:02,433 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:35:02,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-20 23:35:02,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:35:02,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:35:02,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:35:03,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:35:03,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:35:03,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:35:03,460 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:35:03,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [804806488] [2021-11-20 23:35:03,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [804806488] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:35:03,460 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:35:03,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-20 23:35:03,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751167149] [2021-11-20 23:35:03,461 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:35:03,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:35:03,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:35:03,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:35:03,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:35:03,462 INFO L87 Difference]: Start difference. First operand 2566 states and 3307 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) [2021-11-20 23:35:03,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:35:03,688 INFO L93 Difference]: Finished difference Result 3547 states and 4402 transitions. [2021-11-20 23:35:03,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:35:03,691 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 [2021-11-20 23:35:03,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:35:03,695 INFO L225 Difference]: With dead ends: 3547 [2021-11-20 23:35:03,695 INFO L226 Difference]: Without dead ends: 3547 [2021-11-20 23:35:03,695 INFO L932 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 [2021-11-20 23:35:03,696 INFO L933 BasicCegarLoop]: 2011 mSDtfsCounter, 866 mSDsluCounter, 1661 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 874 SdHoareTripleChecker+Valid, 3672 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:35:03,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [874 Valid, 3672 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:35:03,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3547 states. [2021-11-20 23:35:03,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3547 to 3211. [2021-11-20 23:35:03,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3211 states, 2471 states have (on average 1.7567786321327399) internal successors, (4341), 3184 states have internal predecessors, (4341), 27 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (27), 24 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-20 23:35:03,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3211 states to 3211 states and 4395 transitions. [2021-11-20 23:35:03,751 INFO L78 Accepts]: Start accepts. Automaton has 3211 states and 4395 transitions. Word has length 59 [2021-11-20 23:35:03,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:35:03,751 INFO L470 AbstractCegarLoop]: Abstraction has 3211 states and 4395 transitions. [2021-11-20 23:35:03,751 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) [2021-11-20 23:35:03,752 INFO L276 IsEmpty]: Start isEmpty. Operand 3211 states and 4395 transitions. [2021-11-20 23:35:03,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 23:35:03,752 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:35:03,753 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:35:03,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-20 23:35:03,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:35:03,974 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-20 23:35:03,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:35:03,975 INFO L85 PathProgramCache]: Analyzing trace with hash -45497454, now seen corresponding path program 1 times [2021-11-20 23:35:03,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:35:03,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [234730604] [2021-11-20 23:35:03,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:35:03,976 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:35:03,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:35:03,977 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:35:03,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-20 23:35:04,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:35:04,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 23:35:04,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:35:04,350 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 [2021-11-20 23:35:04,358 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 [2021-11-20 23:35:05,101 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 23:35:05,101 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 24 treesize of output 26 [2021-11-20 23:35:05,125 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 23:35:05,125 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 23 treesize of output 19 [2021-11-20 23:35:05,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:35:05,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:35:10,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:35:10,176 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:35:10,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [234730604] [2021-11-20 23:35:10,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [234730604] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:35:10,177 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:35:10,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-20 23:35:10,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032604993] [2021-11-20 23:35:10,177 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:35:10,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:35:10,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:35:10,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:35:10,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-20 23:35:10,179 INFO L87 Difference]: Start difference. First operand 3211 states and 4395 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) [2021-11-20 23:35:11,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:35:11,946 INFO L93 Difference]: Finished difference Result 3475 states and 4584 transitions. [2021-11-20 23:35:11,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:35:11,947 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 [2021-11-20 23:35:11,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:35:11,952 INFO L225 Difference]: With dead ends: 3475 [2021-11-20 23:35:11,952 INFO L226 Difference]: Without dead ends: 3475 [2021-11-20 23:35:11,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-20 23:35:11,953 INFO L933 BasicCegarLoop]: 1807 mSDtfsCounter, 867 mSDsluCounter, 2226 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 4033 SdHoareTripleChecker+Invalid, 2533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2186 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:35:11,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [867 Valid, 4033 Invalid, 2533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 346 Invalid, 0 Unknown, 2186 Unchecked, 1.7s Time] [2021-11-20 23:35:11,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3475 states. [2021-11-20 23:35:12,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3475 to 3210. [2021-11-20 23:35:12,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3210 states, 2471 states have (on average 1.7559692432213678) internal successors, (4339), 3183 states have internal predecessors, (4339), 27 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (27), 24 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-20 23:35:12,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3210 states to 3210 states and 4393 transitions. [2021-11-20 23:35:12,017 INFO L78 Accepts]: Start accepts. Automaton has 3210 states and 4393 transitions. Word has length 62 [2021-11-20 23:35:12,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:35:12,017 INFO L470 AbstractCegarLoop]: Abstraction has 3210 states and 4393 transitions. [2021-11-20 23:35:12,018 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) [2021-11-20 23:35:12,018 INFO L276 IsEmpty]: Start isEmpty. Operand 3210 states and 4393 transitions. [2021-11-20 23:35:12,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 23:35:12,019 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:35:12,019 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:35:12,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-20 23:35:12,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:35:12,238 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr391REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-20 23:35:12,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:35:12,239 INFO L85 PathProgramCache]: Analyzing trace with hash -272070766, now seen corresponding path program 1 times [2021-11-20 23:35:12,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:35:12,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [106030856] [2021-11-20 23:35:12,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:35:12,240 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:35:12,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:35:12,241 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:35:12,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-20 23:35:12,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:35:12,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 23:35:12,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:35:12,656 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 [2021-11-20 23:35:12,669 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 [2021-11-20 23:35:13,490 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 23:35:13,490 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 24 treesize of output 26 [2021-11-20 23:35:13,497 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 23:35:13,498 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 23 treesize of output 19 [2021-11-20 23:35:13,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:35:13,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:35:18,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:35:18,544 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:35:18,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [106030856] [2021-11-20 23:35:18,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [106030856] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:35:18,544 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:35:18,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-20 23:35:18,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718262284] [2021-11-20 23:35:18,545 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:35:18,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:35:18,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:35:18,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:35:18,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-20 23:35:18,546 INFO L87 Difference]: Start difference. First operand 3210 states and 4393 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) [2021-11-20 23:35:27,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:35:27,670 INFO L93 Difference]: Finished difference Result 4698 states and 6320 transitions. [2021-11-20 23:35:27,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:35:27,670 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 [2021-11-20 23:35:27,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:35:27,679 INFO L225 Difference]: With dead ends: 4698 [2021-11-20 23:35:27,679 INFO L226 Difference]: Without dead ends: 4698 [2021-11-20 23:35:27,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=19, Invalid=22, Unknown=1, NotChecked=0, Total=42 [2021-11-20 23:35:27,680 INFO L933 BasicCegarLoop]: 1219 mSDtfsCounter, 2734 mSDsluCounter, 1579 mSDsCounter, 0 mSdLazyCounter, 2273 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2749 SdHoareTripleChecker+Valid, 2798 SdHoareTripleChecker+Invalid, 3673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 2273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1301 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:35:27,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2749 Valid, 2798 Invalid, 3673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 2273 Invalid, 0 Unknown, 1301 Unchecked, 9.0s Time] [2021-11-20 23:35:27,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4698 states. [2021-11-20 23:35:27,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4698 to 3203. [2021-11-20 23:35:27,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3203 states, 2524 states have (on average 1.705229793977813) internal successors, (4304), 3176 states have internal predecessors, (4304), 27 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (27), 24 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-20 23:35:27,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 4358 transitions. [2021-11-20 23:35:27,742 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 4358 transitions. Word has length 62 [2021-11-20 23:35:27,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:35:27,742 INFO L470 AbstractCegarLoop]: Abstraction has 3203 states and 4358 transitions. [2021-11-20 23:35:27,742 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) [2021-11-20 23:35:27,743 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 4358 transitions. [2021-11-20 23:35:27,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-20 23:35:27,743 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:35:27,744 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:35:27,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-20 23:35:27,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:35:27,960 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr393REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-20 23:35:27,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:35:27,961 INFO L85 PathProgramCache]: Analyzing trace with hash 533035699, now seen corresponding path program 1 times [2021-11-20 23:35:27,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:35:27,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1134943104] [2021-11-20 23:35:27,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:35:27,961 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:35:27,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:35:27,962 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:35:27,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-20 23:35:28,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:35:28,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:35:28,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:35:28,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:35:28,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:35:28,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-11-20 23:35:28,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:35:28,822 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:35:28,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1134943104] [2021-11-20 23:35:28,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1134943104] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:35:28,822 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:35:28,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-20 23:35:28,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135014825] [2021-11-20 23:35:28,823 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:35:28,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:35:28,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:35:28,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:35:28,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:35:28,825 INFO L87 Difference]: Start difference. First operand 3203 states and 4358 transitions. Second operand has 6 states, 5 states have (on average 24.8) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:35:32,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:35:32,541 INFO L93 Difference]: Finished difference Result 3204 states and 4351 transitions. [2021-11-20 23:35:32,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:35:32,543 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 24.8) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 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 64 [2021-11-20 23:35:32,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:35:32,548 INFO L225 Difference]: With dead ends: 3204 [2021-11-20 23:35:32,548 INFO L226 Difference]: Without dead ends: 3204 [2021-11-20 23:35:32,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:35:32,549 INFO L933 BasicCegarLoop]: 1060 mSDtfsCounter, 4715 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4725 SdHoareTripleChecker+Valid, 1274 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:35:32,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4725 Valid, 1274 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 841 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-11-20 23:35:32,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3204 states. [2021-11-20 23:35:32,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3204 to 3200. [2021-11-20 23:35:32,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3200 states, 2524 states have (on average 1.7024564183835182) internal successors, (4297), 3173 states have internal predecessors, (4297), 27 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (27), 24 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-20 23:35:32,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3200 states to 3200 states and 4351 transitions. [2021-11-20 23:35:32,597 INFO L78 Accepts]: Start accepts. Automaton has 3200 states and 4351 transitions. Word has length 64 [2021-11-20 23:35:32,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:35:32,597 INFO L470 AbstractCegarLoop]: Abstraction has 3200 states and 4351 transitions. [2021-11-20 23:35:32,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 24.8) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:35:32,598 INFO L276 IsEmpty]: Start isEmpty. Operand 3200 states and 4351 transitions. [2021-11-20 23:35:32,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-20 23:35:32,599 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:35:32,599 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:35:32,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-20 23:35:32,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:35:32,822 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-20 23:35:32,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:35:32,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1308391416, now seen corresponding path program 1 times [2021-11-20 23:35:32,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:35:32,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1485472715] [2021-11-20 23:35:32,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:35:32,824 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:35:32,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:35:32,826 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:35:32,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-20 23:35:33,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:35:33,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 23:35:33,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:35:33,282 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 [2021-11-20 23:35:33,299 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 [2021-11-20 23:35:33,349 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 [2021-11-20 23:35:33,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:35:33,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:35:33,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:35:33,541 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:35:33,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1485472715] [2021-11-20 23:35:33,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1485472715] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:35:33,541 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:35:33,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-20 23:35:33,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968696266] [2021-11-20 23:35:33,541 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:35:33,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:35:33,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:35:33,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:35:33,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:35:33,542 INFO L87 Difference]: Start difference. First operand 3200 states and 4351 transitions. Second operand has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:35:39,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:35:39,302 INFO L93 Difference]: Finished difference Result 3199 states and 4349 transitions. [2021-11-20 23:35:39,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:35:39,302 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2021-11-20 23:35:39,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:35:39,309 INFO L225 Difference]: With dead ends: 3199 [2021-11-20 23:35:39,309 INFO L226 Difference]: Without dead ends: 3199 [2021-11-20 23:35:39,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 126 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:35:39,310 INFO L933 BasicCegarLoop]: 1724 mSDtfsCounter, 4 mSDsluCounter, 2877 mSDsCounter, 0 mSdLazyCounter, 2300 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 4601 SdHoareTripleChecker+Invalid, 2301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:35:39,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 4601 Invalid, 2301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2300 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2021-11-20 23:35:39,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3199 states. [2021-11-20 23:35:39,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3199 to 3199. [2021-11-20 23:35:39,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3199 states, 2524 states have (on average 1.701664025356577) internal successors, (4295), 3172 states have internal predecessors, (4295), 27 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (27), 24 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-20 23:35:39,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3199 states to 3199 states and 4349 transitions. [2021-11-20 23:35:39,374 INFO L78 Accepts]: Start accepts. Automaton has 3199 states and 4349 transitions. Word has length 67 [2021-11-20 23:35:39,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:35:39,375 INFO L470 AbstractCegarLoop]: Abstraction has 3199 states and 4349 transitions. [2021-11-20 23:35:39,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:35:39,375 INFO L276 IsEmpty]: Start isEmpty. Operand 3199 states and 4349 transitions. [2021-11-20 23:35:39,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-20 23:35:39,376 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:35:39,377 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:35:39,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-20 23:35:39,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:35:39,593 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr79REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-20 23:35:39,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:35:39,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1308391415, now seen corresponding path program 1 times [2021-11-20 23:35:39,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:35:39,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1589506600] [2021-11-20 23:35:39,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:35:39,595 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:35:39,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:35:39,598 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:35:39,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-20 23:35:39,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:35:39,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 23:35:39,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:35:40,034 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 [2021-11-20 23:35:40,062 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 [2021-11-20 23:35:40,070 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 [2021-11-20 23:35:40,129 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 [2021-11-20 23:35:40,132 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 [2021-11-20 23:35:40,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:35:40,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:35:40,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:35:40,457 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:35:40,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1589506600] [2021-11-20 23:35:40,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1589506600] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:35:40,458 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:35:40,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-20 23:35:40,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517659951] [2021-11-20 23:35:40,458 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:35:40,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 23:35:40,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:35:40,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 23:35:40,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:35:40,459 INFO L87 Difference]: Start difference. First operand 3199 states and 4349 transitions. Second operand has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:35:57,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:35:57,229 INFO L93 Difference]: Finished difference Result 3198 states and 4347 transitions. [2021-11-20 23:35:57,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:35:57,231 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 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 67 [2021-11-20 23:35:57,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:35:57,254 INFO L225 Difference]: With dead ends: 3198 [2021-11-20 23:35:57,254 INFO L226 Difference]: Without dead ends: 3198 [2021-11-20 23:35:57,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-20 23:35:57,255 INFO L933 BasicCegarLoop]: 1724 mSDtfsCounter, 3 mSDsluCounter, 3788 mSDsCounter, 0 mSdLazyCounter, 3109 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 5512 SdHoareTripleChecker+Invalid, 3111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.6s IncrementalHoareTripleChecker+Time [2021-11-20 23:35:57,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 5512 Invalid, 3111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3109 Invalid, 0 Unknown, 0 Unchecked, 16.6s Time] [2021-11-20 23:35:57,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3198 states. [2021-11-20 23:35:57,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3198 to 3198. [2021-11-20 23:35:57,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3198 states, 2522 states have (on average 1.7022204599524187) internal successors, (4293), 3171 states have internal predecessors, (4293), 27 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (27), 24 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-20 23:35:57,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3198 states to 3198 states and 4347 transitions. [2021-11-20 23:35:57,293 INFO L78 Accepts]: Start accepts. Automaton has 3198 states and 4347 transitions. Word has length 67 [2021-11-20 23:35:57,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:35:57,293 INFO L470 AbstractCegarLoop]: Abstraction has 3198 states and 4347 transitions. [2021-11-20 23:35:57,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:35:57,294 INFO L276 IsEmpty]: Start isEmpty. Operand 3198 states and 4347 transitions. [2021-11-20 23:35:57,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-20 23:35:57,295 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:35:57,295 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:35:57,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-20 23:35:57,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:35:57,508 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr396REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-20 23:35:57,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:35:57,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1173564532, now seen corresponding path program 1 times [2021-11-20 23:35:57,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:35:57,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1971161576] [2021-11-20 23:35:57,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:35:57,510 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:35:57,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:35:57,512 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:35:57,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-20 23:35:57,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:35:57,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 23:35:57,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:35:57,877 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 [2021-11-20 23:35:57,888 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 [2021-11-20 23:35:57,919 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 [2021-11-20 23:35:57,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:35:57,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:35:58,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:35:58,055 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:35:58,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1971161576] [2021-11-20 23:35:58,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1971161576] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:35:58,056 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:35:58,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-20 23:35:58,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390693782] [2021-11-20 23:35:58,056 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:35:58,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:35:58,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:35:58,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:35:58,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:35:58,057 INFO L87 Difference]: Start difference. First operand 3198 states and 4347 transitions. Second operand has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:36:03,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:03,619 INFO L93 Difference]: Finished difference Result 3197 states and 4344 transitions. [2021-11-20 23:36:03,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:36:03,620 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2021-11-20 23:36:03,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:03,625 INFO L225 Difference]: With dead ends: 3197 [2021-11-20 23:36:03,625 INFO L226 Difference]: Without dead ends: 3197 [2021-11-20 23:36:03,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:36:03,626 INFO L933 BasicCegarLoop]: 1722 mSDtfsCounter, 4 mSDsluCounter, 2874 mSDsCounter, 0 mSdLazyCounter, 2297 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 4596 SdHoareTripleChecker+Invalid, 2298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:03,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 4596 Invalid, 2298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2297 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2021-11-20 23:36:03,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3197 states. [2021-11-20 23:36:03,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3197 to 3197. [2021-11-20 23:36:03,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3197 states, 2522 states have (on average 1.7010309278350515) internal successors, (4290), 3170 states have internal predecessors, (4290), 27 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (27), 24 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-20 23:36:03,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3197 states to 3197 states and 4344 transitions. [2021-11-20 23:36:03,671 INFO L78 Accepts]: Start accepts. Automaton has 3197 states and 4344 transitions. Word has length 67 [2021-11-20 23:36:03,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:03,671 INFO L470 AbstractCegarLoop]: Abstraction has 3197 states and 4344 transitions. [2021-11-20 23:36:03,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:36:03,672 INFO L276 IsEmpty]: Start isEmpty. Operand 3197 states and 4344 transitions. [2021-11-20 23:36:03,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-20 23:36:03,673 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:03,673 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:36:03,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-20 23:36:03,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:36:03,888 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr397REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-20 23:36:03,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:03,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1173564533, now seen corresponding path program 1 times [2021-11-20 23:36:03,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:36:03,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [381275450] [2021-11-20 23:36:03,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:03,889 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:36:03,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:36:03,890 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:36:03,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-20 23:36:04,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:04,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 23:36:04,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:36:04,263 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 [2021-11-20 23:36:04,286 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 [2021-11-20 23:36:04,296 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 [2021-11-20 23:36:04,375 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 [2021-11-20 23:36:04,379 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 [2021-11-20 23:36:04,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:36:04,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:36:04,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:36:04,760 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:36:04,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [381275450] [2021-11-20 23:36:04,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [381275450] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:36:04,760 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:36:04,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-20 23:36:04,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542446523] [2021-11-20 23:36:04,760 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:36:04,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 23:36:04,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:36:04,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 23:36:04,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:36:04,761 INFO L87 Difference]: Start difference. First operand 3197 states and 4344 transitions. Second operand has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:36:20,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:20,302 INFO L93 Difference]: Finished difference Result 3196 states and 4341 transitions. [2021-11-20 23:36:20,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:36:20,303 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 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 67 [2021-11-20 23:36:20,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:20,307 INFO L225 Difference]: With dead ends: 3196 [2021-11-20 23:36:20,307 INFO L226 Difference]: Without dead ends: 3196 [2021-11-20 23:36:20,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-20 23:36:20,308 INFO L933 BasicCegarLoop]: 1722 mSDtfsCounter, 4 mSDsluCounter, 3794 mSDsCounter, 0 mSdLazyCounter, 3098 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 5516 SdHoareTripleChecker+Invalid, 3099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:20,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 5516 Invalid, 3099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3098 Invalid, 0 Unknown, 0 Unchecked, 15.4s Time] [2021-11-20 23:36:20,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3196 states. [2021-11-20 23:36:20,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3196 to 3196. [2021-11-20 23:36:20,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3196 states, 2519 states have (on average 1.7018658197697498) internal successors, (4287), 3169 states have internal predecessors, (4287), 27 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (27), 24 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-20 23:36:20,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3196 states to 3196 states and 4341 transitions. [2021-11-20 23:36:20,340 INFO L78 Accepts]: Start accepts. Automaton has 3196 states and 4341 transitions. Word has length 67 [2021-11-20 23:36:20,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:20,340 INFO L470 AbstractCegarLoop]: Abstraction has 3196 states and 4341 transitions. [2021-11-20 23:36:20,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:36:20,340 INFO L276 IsEmpty]: Start isEmpty. Operand 3196 states and 4341 transitions. [2021-11-20 23:36:20,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-20 23:36:20,342 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:20,342 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:36:20,376 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-11-20 23:36:20,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:36:20,556 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-20 23:36:20,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:20,557 INFO L85 PathProgramCache]: Analyzing trace with hash 2062362287, now seen corresponding path program 1 times [2021-11-20 23:36:20,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:36:20,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1020006528] [2021-11-20 23:36:20,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:20,557 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:36:20,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:36:20,558 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:36:20,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-20 23:36:20,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:20,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:36:20,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:36:21,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:36:21,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:36:21,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:36:21,248 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:36:21,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1020006528] [2021-11-20 23:36:21,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1020006528] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:36:21,249 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:36:21,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 23:36:21,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115697801] [2021-11-20 23:36:21,249 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:36:21,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:36:21,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:36:21,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:36:21,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:36:21,251 INFO L87 Difference]: Start difference. First operand 3196 states and 4341 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:36:21,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:21,440 INFO L93 Difference]: Finished difference Result 3206 states and 4357 transitions. [2021-11-20 23:36:21,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:36:21,442 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 75 [2021-11-20 23:36:21,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:21,460 INFO L225 Difference]: With dead ends: 3206 [2021-11-20 23:36:21,460 INFO L226 Difference]: Without dead ends: 3206 [2021-11-20 23:36:21,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:36:21,461 INFO L933 BasicCegarLoop]: 1720 mSDtfsCounter, 11 mSDsluCounter, 1719 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 3439 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:21,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 3439 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:36:21,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3206 states. [2021-11-20 23:36:21,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3206 to 3206. [2021-11-20 23:36:21,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3206 states, 2527 states have (on average 1.7012267510882468) internal successors, (4299), 3178 states have internal predecessors, (4299), 27 states have call successors, (27), 4 states have call predecessors, (27), 5 states have return successors, (31), 24 states have call predecessors, (31), 27 states have call successors, (31) [2021-11-20 23:36:21,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3206 states to 3206 states and 4357 transitions. [2021-11-20 23:36:21,518 INFO L78 Accepts]: Start accepts. Automaton has 3206 states and 4357 transitions. Word has length 75 [2021-11-20 23:36:21,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:21,519 INFO L470 AbstractCegarLoop]: Abstraction has 3206 states and 4357 transitions. [2021-11-20 23:36:21,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:36:21,519 INFO L276 IsEmpty]: Start isEmpty. Operand 3206 states and 4357 transitions. [2021-11-20 23:36:21,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-20 23:36:21,520 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:21,521 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:36:21,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-20 23:36:21,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:36:21,739 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-20 23:36:21,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:21,740 INFO L85 PathProgramCache]: Analyzing trace with hash -110653553, now seen corresponding path program 1 times [2021-11-20 23:36:21,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:36:21,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [569870163] [2021-11-20 23:36:21,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:21,740 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:36:21,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:36:21,741 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:36:21,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-20 23:36:21,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:21,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 23:36:21,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:36:22,185 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:36:22,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:36:22,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:36:22,486 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:36:22,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [569870163] [2021-11-20 23:36:22,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [569870163] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:36:22,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [347880635] [2021-11-20 23:36:22,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:22,487 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:36:22,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:36:22,493 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:36:22,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-20 23:36:22,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:22,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 23:36:22,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:36:23,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:36:23,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:36:23,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:36:23,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [347880635] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:36:23,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742672392] [2021-11-20 23:36:23,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:23,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:36:23,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:36:23,220 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:36:23,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-20 23:36:23,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:23,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 23:36:23,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:36:23,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:36:23,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:36:23,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:36:23,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742672392] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:36:23,925 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 23:36:23,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 14 [2021-11-20 23:36:23,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935142355] [2021-11-20 23:36:23,926 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 23:36:23,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 23:36:23,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:36:23,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 23:36:23,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-11-20 23:36:23,927 INFO L87 Difference]: Start difference. First operand 3206 states and 4357 transitions. Second operand has 14 states, 14 states have (on average 6.142857142857143) internal successors, (86), 14 states have internal predecessors, (86), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 23:36:24,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:24,634 INFO L93 Difference]: Finished difference Result 3220 states and 4377 transitions. [2021-11-20 23:36:24,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 23:36:24,635 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.142857142857143) internal successors, (86), 14 states have internal predecessors, (86), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 77 [2021-11-20 23:36:24,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:24,644 INFO L225 Difference]: With dead ends: 3220 [2021-11-20 23:36:24,644 INFO L226 Difference]: Without dead ends: 3214 [2021-11-20 23:36:24,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=188, Invalid=318, Unknown=0, NotChecked=0, Total=506 [2021-11-20 23:36:24,646 INFO L933 BasicCegarLoop]: 1720 mSDtfsCounter, 38 mSDsluCounter, 8570 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 10290 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:24,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 10290 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 23:36:24,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3214 states. [2021-11-20 23:36:24,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3214 to 3212. [2021-11-20 23:36:24,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3212 states, 2533 states have (on average 1.6999605211212) internal successors, (4306), 3184 states have internal predecessors, (4306), 27 states have call successors, (27), 4 states have call predecessors, (27), 5 states have return successors, (31), 24 states have call predecessors, (31), 27 states have call successors, (31) [2021-11-20 23:36:24,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3212 states to 3212 states and 4364 transitions. [2021-11-20 23:36:24,728 INFO L78 Accepts]: Start accepts. Automaton has 3212 states and 4364 transitions. Word has length 77 [2021-11-20 23:36:24,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:24,729 INFO L470 AbstractCegarLoop]: Abstraction has 3212 states and 4364 transitions. [2021-11-20 23:36:24,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.142857142857143) internal successors, (86), 14 states have internal predecessors, (86), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 23:36:24,729 INFO L276 IsEmpty]: Start isEmpty. Operand 3212 states and 4364 transitions. [2021-11-20 23:36:24,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-20 23:36:24,730 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:24,731 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:36:24,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-20 23:36:24,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-11-20 23:36:25,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-20 23:36:25,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:36:25,346 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-20 23:36:25,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:25,346 INFO L85 PathProgramCache]: Analyzing trace with hash 977680719, now seen corresponding path program 2 times [2021-11-20 23:36:25,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:36:25,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1062017669] [2021-11-20 23:36:25,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 23:36:25,347 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:36:25,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:36:25,348 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:36:25,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-20 23:36:25,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 23:36:25,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:36:25,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 23:36:25,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:36:26,075 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:36:26,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:36:26,545 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:36:26,545 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:36:26,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1062017669] [2021-11-20 23:36:26,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1062017669] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:36:26,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1608863329] [2021-11-20 23:36:26,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 23:36:26,546 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:36:26,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:36:26,546 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:36:26,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-20 23:36:27,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 23:36:27,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:36:27,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 23:36:27,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:36:27,595 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:36:27,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:36:27,792 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:36:27,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1608863329] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:36:27,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551556252] [2021-11-20 23:36:27,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 23:36:27,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:36:27,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:36:27,794 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:36:27,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-20 23:37:05,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 23:37:05,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:37:05,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 23:37:05,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:37:05,954 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:37:05,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:37:06,555 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:37:06,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551556252] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:37:06,556 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 23:37:06,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 26 [2021-11-20 23:37:06,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983088225] [2021-11-20 23:37:06,557 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 23:37:06,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-20 23:37:06,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:37:06,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-20 23:37:06,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-11-20 23:37:06,559 INFO L87 Difference]: Start difference. First operand 3212 states and 4364 transitions. Second operand has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 26 states have internal predecessors, (98), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 23:37:08,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:37:08,653 INFO L93 Difference]: Finished difference Result 3238 states and 4411 transitions. [2021-11-20 23:37:08,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-20 23:37:08,654 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 26 states have internal predecessors, (98), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 81 [2021-11-20 23:37:08,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:37:08,660 INFO L225 Difference]: With dead ends: 3238 [2021-11-20 23:37:08,660 INFO L226 Difference]: Without dead ends: 3232 [2021-11-20 23:37:08,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 456 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=706, Invalid=1364, Unknown=0, NotChecked=0, Total=2070 [2021-11-20 23:37:08,662 INFO L933 BasicCegarLoop]: 1723 mSDtfsCounter, 85 mSDsluCounter, 15457 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 17180 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 23:37:08,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 17180 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 23:37:08,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3232 states. [2021-11-20 23:37:08,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3232 to 3224. [2021-11-20 23:37:08,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3224 states, 2545 states have (on average 1.6978388998035363) internal successors, (4321), 3196 states have internal predecessors, (4321), 27 states have call successors, (27), 4 states have call predecessors, (27), 5 states have return successors, (31), 24 states have call predecessors, (31), 27 states have call successors, (31) [2021-11-20 23:37:08,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3224 states to 3224 states and 4379 transitions. [2021-11-20 23:37:08,713 INFO L78 Accepts]: Start accepts. Automaton has 3224 states and 4379 transitions. Word has length 81 [2021-11-20 23:37:08,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:37:08,713 INFO L470 AbstractCegarLoop]: Abstraction has 3224 states and 4379 transitions. [2021-11-20 23:37:08,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 26 states have internal predecessors, (98), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 23:37:08,714 INFO L276 IsEmpty]: Start isEmpty. Operand 3224 states and 4379 transitions. [2021-11-20 23:37:08,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-20 23:37:08,715 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:37:08,715 INFO L514 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:37:08,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-20 23:37:08,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-20 23:37:09,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-11-20 23:37:09,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-20 23:37:09,342 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 986 more)] === [2021-11-20 23:37:09,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:37:09,342 INFO L85 PathProgramCache]: Analyzing trace with hash 397601999, now seen corresponding path program 3 times [2021-11-20 23:37:09,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:37:09,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2030155772] [2021-11-20 23:37:09,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 23:37:09,343 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:37:09,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:37:09,344 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:37:09,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-20 23:37:10,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-20 23:37:10,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:37:10,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 23:37:10,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:37:10,698 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:37:10,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:37:12,597 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:37:12,598 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:37:12,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2030155772] [2021-11-20 23:37:12,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2030155772] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:37:12,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1230525693] [2021-11-20 23:37:12,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 23:37:12,598 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 23:37:12,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 23:37:12,599 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 23:37:12,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-11-20 23:37:14,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-20 23:37:14,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:37:14,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 23:37:14,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:37:14,996 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:37:14,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:37:15,626 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:37:15,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1230525693] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:37:15,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115243195] [2021-11-20 23:37:15,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 23:37:15,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:37:15,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:37:15,627 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:37:15,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1d3d439-bb54-412b-b219-3a937838f743/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process