./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test2-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test2-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash da01f7e29b47732481465e941f69a1c8f9dd5529ae81cb8448eb7568570e2356 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:12:28,857 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:12:28,861 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:12:28,928 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:12:28,929 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:12:28,935 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:12:28,938 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:12:28,943 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:12:28,946 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:12:28,953 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:12:28,955 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:12:28,957 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:12:28,958 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:12:28,961 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:12:28,964 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:12:28,969 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:12:28,972 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:12:28,973 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:12:28,976 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:12:28,985 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:12:28,988 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:12:28,990 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:12:28,994 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:12:28,995 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:12:29,006 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:12:29,007 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:12:29,008 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:12:29,010 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:12:29,011 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:12:29,013 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:12:29,013 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:12:29,015 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:12:29,017 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:12:29,019 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:12:29,021 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:12:29,021 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:12:29,022 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:12:29,023 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:12:29,023 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:12:29,024 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:12:29,025 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:12:29,027 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-03 05:12:29,080 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:12:29,080 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:12:29,082 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:12:29,082 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:12:29,082 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:12:29,083 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:12:29,083 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:12:29,083 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:12:29,084 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:12:29,084 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:12:29,085 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:12:29,085 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:12:29,086 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:12:29,086 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:12:29,086 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:12:29,087 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 05:12:29,088 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 05:12:29,088 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:12:29,088 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:12:29,088 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 05:12:29,089 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:12:29,089 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:12:29,089 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:12:29,090 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 05:12:29,090 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 05:12:29,090 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 05:12:29,092 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:12:29,092 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:12:29,093 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:12:29,093 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:12:29,093 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:12:29,094 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:12:29,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:12:29,095 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:12:29,095 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:12:29,095 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:12:29,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:12:29,096 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:12:29,096 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:12:29,096 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_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> da01f7e29b47732481465e941f69a1c8f9dd5529ae81cb8448eb7568570e2356 [2021-11-03 05:12:29,441 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:12:29,488 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:12:29,491 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:12:29,493 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:12:29,494 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:12:29,495 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test2-2.i [2021-11-03 05:12:29,606 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/data/7aaee5e1b/f28adf95daf74fb2861b62c325810ae8/FLAG976798c8e [2021-11-03 05:12:30,468 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:12:30,471 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test2-2.i [2021-11-03 05:12:30,508 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/data/7aaee5e1b/f28adf95daf74fb2861b62c325810ae8/FLAG976798c8e [2021-11-03 05:12:30,588 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/data/7aaee5e1b/f28adf95daf74fb2861b62c325810ae8 [2021-11-03 05:12:30,596 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:12:30,599 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:12:30,604 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:12:30,605 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:12:30,610 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:12:30,611 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:12:30" (1/1) ... [2021-11-03 05:12:30,612 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43c94252 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:12:30, skipping insertion in model container [2021-11-03 05:12:30,612 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:12:30" (1/1) ... [2021-11-03 05:12:30,621 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:12:30,720 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:12:31,366 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test2-2.i[37019,37032] [2021-11-03 05:12:31,552 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test2-2.i[47352,47365] [2021-11-03 05:12:31,585 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:12:31,605 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-03 05:12:31,606 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3398d1b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:12:31, skipping insertion in model container [2021-11-03 05:12:31,607 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:12:31,607 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 05:12:31,609 INFO L168 Benchmark]: Toolchain (without parser) took 1008.75 ms. Allocated memory is still 92.3 MB. Free memory was 55.0 MB in the beginning and 56.6 MB in the end (delta: -1.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-03 05:12:31,611 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 92.3 MB. Free memory was 65.1 MB in the beginning and 65.1 MB in the end (delta: 25.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:12:31,612 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1002.60 ms. Allocated memory is still 92.3 MB. Free memory was 54.8 MB in the beginning and 56.6 MB in the end (delta: -1.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-03 05:12:31,614 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 92.3 MB. Free memory was 65.1 MB in the beginning and 65.1 MB in the end (delta: 25.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1002.60 ms. Allocated memory is still 92.3 MB. Free memory was 54.8 MB in the beginning and 56.6 MB in the end (delta: -1.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 815]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test2-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash da01f7e29b47732481465e941f69a1c8f9dd5529ae81cb8448eb7568570e2356 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:12:34,254 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:12:34,257 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:12:34,296 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:12:34,297 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:12:34,299 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:12:34,301 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:12:34,304 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:12:34,308 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:12:34,309 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:12:34,311 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:12:34,313 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:12:34,314 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:12:34,316 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:12:34,318 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:12:34,320 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:12:34,321 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:12:34,323 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:12:34,328 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:12:34,336 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:12:34,339 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:12:34,346 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:12:34,348 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:12:34,349 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:12:34,355 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:12:34,365 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:12:34,365 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:12:34,367 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:12:34,368 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:12:34,369 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:12:34,370 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:12:34,371 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:12:34,378 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:12:34,379 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:12:34,381 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:12:34,382 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:12:34,384 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:12:34,385 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:12:34,386 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:12:34,388 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:12:34,390 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:12:34,391 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-03 05:12:34,457 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:12:34,458 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:12:34,460 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:12:34,460 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:12:34,461 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:12:34,461 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:12:34,461 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:12:34,462 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:12:34,462 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:12:34,464 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 05:12:34,465 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 05:12:34,466 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:12:34,466 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:12:34,466 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 05:12:34,467 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:12:34,467 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:12:34,467 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:12:34,468 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 05:12:34,468 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 05:12:34,468 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 05:12:34,468 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:12:34,469 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:12:34,469 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 05:12:34,469 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 05:12:34,470 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:12:34,470 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:12:34,470 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:12:34,470 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 05:12:34,471 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:12:34,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:12:34,471 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:12:34,472 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:12:34,472 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 05:12:34,472 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 05:12:34,473 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:12:34,473 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:12:34,474 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_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> da01f7e29b47732481465e941f69a1c8f9dd5529ae81cb8448eb7568570e2356 [2021-11-03 05:12:34,922 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:12:34,959 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:12:34,963 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:12:34,964 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:12:34,965 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:12:34,966 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test2-2.i [2021-11-03 05:12:35,040 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/data/c1d89dab4/983a15a0f8da4a91a451d4212e4db230/FLAG14b0499d4 [2021-11-03 05:12:35,778 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:12:35,790 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test2-2.i [2021-11-03 05:12:35,830 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/data/c1d89dab4/983a15a0f8da4a91a451d4212e4db230/FLAG14b0499d4 [2021-11-03 05:12:35,943 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/data/c1d89dab4/983a15a0f8da4a91a451d4212e4db230 [2021-11-03 05:12:35,953 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:12:35,956 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:12:35,960 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:12:35,960 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:12:35,965 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:12:35,965 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:12:35" (1/1) ... [2021-11-03 05:12:35,968 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@436b2a3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:12:35, skipping insertion in model container [2021-11-03 05:12:35,970 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:12:35" (1/1) ... [2021-11-03 05:12:35,980 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:12:36,078 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:12:36,833 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test2-2.i[37019,37032] [2021-11-03 05:12:37,000 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test2-2.i[47352,47365] [2021-11-03 05:12:37,031 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:12:37,058 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 05:12:37,076 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:12:37,124 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test2-2.i[37019,37032] [2021-11-03 05:12:37,244 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test2-2.i[47352,47365] [2021-11-03 05:12:37,265 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:12:37,286 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:12:37,329 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test2-2.i[37019,37032] [2021-11-03 05:12:37,403 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test2-2.i[47352,47365] [2021-11-03 05:12:37,411 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:12:37,470 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:12:37,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:12:37 WrapperNode [2021-11-03 05:12:37,471 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:12:37,472 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:12:37,473 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:12:37,473 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:12:37,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:12:37" (1/1) ... [2021-11-03 05:12:37,523 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:12:37" (1/1) ... [2021-11-03 05:12:37,592 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:12:37,593 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:12:37,593 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:12:37,593 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:12:37,603 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:12:37" (1/1) ... [2021-11-03 05:12:37,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:12:37" (1/1) ... [2021-11-03 05:12:37,617 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:12:37" (1/1) ... [2021-11-03 05:12:37,618 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:12:37" (1/1) ... [2021-11-03 05:12:37,711 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:12:37" (1/1) ... [2021-11-03 05:12:37,742 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:12:37" (1/1) ... [2021-11-03 05:12:37,765 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:12:37" (1/1) ... [2021-11-03 05:12:37,777 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:12:37,786 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:12:37,786 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:12:37,787 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:12:37,794 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:12:37" (1/1) ... [2021-11-03 05:12:37,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:12:37,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:12:37,834 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:12:37,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:12:37,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-03 05:12:37,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 05:12:37,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:12:37,901 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-03 05:12:37,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 05:12:37,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 05:12:37,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 05:12:37,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 05:12:37,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 05:12:37,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 05:12:37,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:12:37,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:12:44,548 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:12:44,548 INFO L299 CfgBuilder]: Removed 85 assume(true) statements. [2021-11-03 05:12:44,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:12:44 BoogieIcfgContainer [2021-11-03 05:12:44,553 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:12:44,555 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:12:44,555 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:12:44,559 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:12:44,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:12:35" (1/3) ... [2021-11-03 05:12:44,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6db02890 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:12:44, skipping insertion in model container [2021-11-03 05:12:44,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:12:37" (2/3) ... [2021-11-03 05:12:44,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6db02890 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:12:44, skipping insertion in model container [2021-11-03 05:12:44,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:12:44" (3/3) ... [2021-11-03 05:12:44,563 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_OAT_test2-2.i [2021-11-03 05:12:44,570 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:12:44,570 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 540 error locations. [2021-11-03 05:12:44,623 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:12:44,631 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 05:12:44,631 INFO L340 AbstractCegarLoop]: Starting to check reachability of 540 error locations. [2021-11-03 05:12:44,692 INFO L276 IsEmpty]: Start isEmpty. Operand has 1089 states, 548 states have (on average 2.2354014598540144) internal successors, (1225), 1088 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:44,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-03 05:12:44,699 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:12:44,703 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-03 05:12:44,703 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-03 05:12:44,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:12:44,716 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-11-03 05:12:44,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:12:44,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1799320843] [2021-11-03 05:12:44,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:12:44,730 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:12:44,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:12:44,733 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:12:44,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 05:12:44,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:12:44,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:12:44,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:12:45,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 05:12:45,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:12:45,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:12:45,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:12:45,081 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:12:45,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1799320843] [2021-11-03 05:12:45,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1799320843] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:12:45,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:12:45,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 05:12:45,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454340874] [2021-11-03 05:12:45,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:12:45,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:12:45,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:12:45,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:12:45,144 INFO L87 Difference]: Start difference. First operand has 1089 states, 548 states have (on average 2.2354014598540144) internal successors, (1225), 1088 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:48,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:12:48,021 INFO L93 Difference]: Finished difference Result 1253 states and 1325 transitions. [2021-11-03 05:12:48,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:12:48,024 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-03 05:12:48,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:12:48,063 INFO L225 Difference]: With dead ends: 1253 [2021-11-03 05:12:48,064 INFO L226 Difference]: Without dead ends: 1251 [2021-11-03 05:12:48,066 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:12:48,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2021-11-03 05:12:48,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1073. [2021-11-03 05:12:48,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 548 states have (on average 2.0748175182481754) internal successors, (1137), 1072 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:48,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 1137 transitions. [2021-11-03 05:12:48,205 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 1137 transitions. Word has length 3 [2021-11-03 05:12:48,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:12:48,206 INFO L470 AbstractCegarLoop]: Abstraction has 1073 states and 1137 transitions. [2021-11-03 05:12:48,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:48,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 1137 transitions. [2021-11-03 05:12:48,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-03 05:12:48,207 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:12:48,207 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-03 05:12:48,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 05:12:48,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:12:48,418 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-03 05:12:48,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:12:48,420 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-11-03 05:12:48,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:12:48,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [983448737] [2021-11-03 05:12:48,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:12:48,422 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:12:48,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:12:48,423 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:12:48,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 05:12:48,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:12:48,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:12:48,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:12:48,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 05:12:48,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:12:48,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:12:48,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:12:48,738 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:12:48,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [983448737] [2021-11-03 05:12:48,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [983448737] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:12:48,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:12:48,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 05:12:48,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901824891] [2021-11-03 05:12:48,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:12:48,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:12:48,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:12:48,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:12:48,743 INFO L87 Difference]: Start difference. First operand 1073 states and 1137 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:54,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:12:54,505 INFO L93 Difference]: Finished difference Result 1576 states and 1680 transitions. [2021-11-03 05:12:54,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:12:54,506 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-03 05:12:54,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:12:54,516 INFO L225 Difference]: With dead ends: 1576 [2021-11-03 05:12:54,517 INFO L226 Difference]: Without dead ends: 1576 [2021-11-03 05:12:54,518 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:12:54,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2021-11-03 05:12:54,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 1108. [2021-11-03 05:12:54,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1108 states, 592 states have (on average 2.054054054054054) internal successors, (1216), 1107 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:54,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 1216 transitions. [2021-11-03 05:12:54,555 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 1216 transitions. Word has length 3 [2021-11-03 05:12:54,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:12:54,555 INFO L470 AbstractCegarLoop]: Abstraction has 1108 states and 1216 transitions. [2021-11-03 05:12:54,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:54,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 1216 transitions. [2021-11-03 05:12:54,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 05:12:54,557 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:12:54,557 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:12:54,582 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-03 05:12:54,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:12:54,772 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-03 05:12:54,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:12:54,774 INFO L85 PathProgramCache]: Analyzing trace with hash 62249618, now seen corresponding path program 1 times [2021-11-03 05:12:54,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:12:54,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [759190714] [2021-11-03 05:12:54,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:12:54,779 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:12:54,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:12:54,780 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:12:54,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 05:12:54,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:12:54,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:12:54,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:12:54,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 05:12:55,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:12:55,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:12:55,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:12:55,046 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:12:55,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [759190714] [2021-11-03 05:12:55,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [759190714] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:12:55,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:12:55,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 05:12:55,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740502579] [2021-11-03 05:12:55,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:12:55,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:12:55,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:12:55,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:12:55,059 INFO L87 Difference]: Start difference. First operand 1108 states and 1216 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:57,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:12:57,237 INFO L93 Difference]: Finished difference Result 1295 states and 1425 transitions. [2021-11-03 05:12:57,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:12:57,239 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-03 05:12:57,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:12:57,247 INFO L225 Difference]: With dead ends: 1295 [2021-11-03 05:12:57,247 INFO L226 Difference]: Without dead ends: 1295 [2021-11-03 05:12:57,247 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:12:57,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1295 states. [2021-11-03 05:12:57,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1295 to 1061. [2021-11-03 05:12:57,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 592 states have (on average 1.9695945945945945) internal successors, (1166), 1060 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:57,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 1166 transitions. [2021-11-03 05:12:57,297 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 1166 transitions. Word has length 8 [2021-11-03 05:12:57,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:12:57,298 INFO L470 AbstractCegarLoop]: Abstraction has 1061 states and 1166 transitions. [2021-11-03 05:12:57,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:57,298 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 1166 transitions. [2021-11-03 05:12:57,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 05:12:57,299 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:12:57,299 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:12:57,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 05:12:57,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:12:57,507 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-03 05:12:57,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:12:57,508 INFO L85 PathProgramCache]: Analyzing trace with hash 62249619, now seen corresponding path program 1 times [2021-11-03 05:12:57,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:12:57,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [111451523] [2021-11-03 05:12:57,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:12:57,509 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:12:57,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:12:57,510 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:12:57,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 05:12:57,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:12:57,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:12:57,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:12:57,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 05:12:57,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:12:57,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:12:57,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:12:57,830 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:12:57,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [111451523] [2021-11-03 05:12:57,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [111451523] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:12:57,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:12:57,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 05:12:57,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667547993] [2021-11-03 05:12:57,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:12:57,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:12:57,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:12:57,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:12:57,833 INFO L87 Difference]: Start difference. First operand 1061 states and 1166 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:04,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:13:04,165 INFO L93 Difference]: Finished difference Result 1325 states and 1419 transitions. [2021-11-03 05:13:04,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:13:04,166 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-03 05:13:04,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:13:04,175 INFO L225 Difference]: With dead ends: 1325 [2021-11-03 05:13:04,175 INFO L226 Difference]: Without dead ends: 1325 [2021-11-03 05:13:04,176 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:13:04,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1325 states. [2021-11-03 05:13:04,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1325 to 1051. [2021-11-03 05:13:04,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1051 states, 592 states have (on average 1.947635135135135) internal successors, (1153), 1050 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:04,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 1153 transitions. [2021-11-03 05:13:04,205 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 1153 transitions. Word has length 8 [2021-11-03 05:13:04,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:13:04,206 INFO L470 AbstractCegarLoop]: Abstraction has 1051 states and 1153 transitions. [2021-11-03 05:13:04,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:04,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 1153 transitions. [2021-11-03 05:13:04,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-03 05:13:04,207 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:13:04,207 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:13:04,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 05:13:04,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:13:04,421 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr434REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-03 05:13:04,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:13:04,422 INFO L85 PathProgramCache]: Analyzing trace with hash -945756139, now seen corresponding path program 1 times [2021-11-03 05:13:04,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:13:04,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [168477980] [2021-11-03 05:13:04,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:13:04,423 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:13:04,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:13:04,425 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:13:04,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 05:13:04,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:13:04,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:13:04,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:13:04,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:13:04,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:13:04,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:13:04,795 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:13:04,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [168477980] [2021-11-03 05:13:04,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [168477980] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:13:04,796 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:13:04,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 05:13:04,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741542161] [2021-11-03 05:13:04,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:13:04,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:13:04,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:13:04,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:13:04,805 INFO L87 Difference]: Start difference. First operand 1051 states and 1153 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:05,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:13:05,166 INFO L93 Difference]: Finished difference Result 1534 states and 1675 transitions. [2021-11-03 05:13:05,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:13:05,167 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-03 05:13:05,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:13:05,177 INFO L225 Difference]: With dead ends: 1534 [2021-11-03 05:13:05,177 INFO L226 Difference]: Without dead ends: 1534 [2021-11-03 05:13:05,178 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:13:05,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1534 states. [2021-11-03 05:13:05,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1534 to 1231. [2021-11-03 05:13:05,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 772 states have (on average 1.8976683937823835) internal successors, (1465), 1230 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:05,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 1465 transitions. [2021-11-03 05:13:05,216 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 1465 transitions. Word has length 11 [2021-11-03 05:13:05,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:13:05,217 INFO L470 AbstractCegarLoop]: Abstraction has 1231 states and 1465 transitions. [2021-11-03 05:13:05,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:05,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 1465 transitions. [2021-11-03 05:13:05,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-03 05:13:05,218 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:13:05,219 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:13:05,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 05:13:05,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:13:05,432 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr340REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-03 05:13:05,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:13:05,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1258779124, now seen corresponding path program 1 times [2021-11-03 05:13:05,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:13:05,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [365978431] [2021-11-03 05:13:05,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:13:05,434 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:13:05,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:13:05,435 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:13:05,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 05:13:05,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:13:05,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:13:05,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:13:05,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:13:05,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:13:05,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:13:05,678 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:13:05,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [365978431] [2021-11-03 05:13:05,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [365978431] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:13:05,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:13:05,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:13:05,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824421899] [2021-11-03 05:13:05,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:13:05,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:13:05,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:13:05,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:13:05,681 INFO L87 Difference]: Start difference. First operand 1231 states and 1465 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:05,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:13:05,720 INFO L93 Difference]: Finished difference Result 1385 states and 1605 transitions. [2021-11-03 05:13:05,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:13:05,721 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-03 05:13:05,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:13:05,729 INFO L225 Difference]: With dead ends: 1385 [2021-11-03 05:13:05,730 INFO L226 Difference]: Without dead ends: 1385 [2021-11-03 05:13:05,730 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:13:05,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2021-11-03 05:13:05,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 1171. [2021-11-03 05:13:05,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1171 states, 736 states have (on average 1.8736413043478262) internal successors, (1379), 1170 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:05,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 1379 transitions. [2021-11-03 05:13:05,787 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 1379 transitions. Word has length 13 [2021-11-03 05:13:05,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:13:05,788 INFO L470 AbstractCegarLoop]: Abstraction has 1171 states and 1379 transitions. [2021-11-03 05:13:05,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:05,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 1379 transitions. [2021-11-03 05:13:05,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-03 05:13:05,789 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:13:05,790 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:13:05,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 05:13:06,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:13:06,003 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr539ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-03 05:13:06,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:13:06,003 INFO L85 PathProgramCache]: Analyzing trace with hash -28488695, now seen corresponding path program 1 times [2021-11-03 05:13:06,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:13:06,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [954223582] [2021-11-03 05:13:06,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:13:06,004 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:13:06,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:13:06,006 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:13:06,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 05:13:06,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:13:06,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:13:06,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:13:06,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:13:06,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:13:06,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:13:06,389 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-03 05:13:06,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-03 05:13:06,489 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-03 05:13:06,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-11-03 05:13:06,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:13:06,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:13:06,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:13:06,638 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:13:06,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [954223582] [2021-11-03 05:13:06,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [954223582] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:13:06,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:13:06,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:13:06,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935490762] [2021-11-03 05:13:06,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:13:06,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:13:06,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:13:06,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:13:06,640 INFO L87 Difference]: Start difference. First operand 1171 states and 1379 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:08,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:13:08,976 INFO L93 Difference]: Finished difference Result 1518 states and 1772 transitions. [2021-11-03 05:13:08,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:13:08,977 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-03 05:13:08,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:13:08,985 INFO L225 Difference]: With dead ends: 1518 [2021-11-03 05:13:08,986 INFO L226 Difference]: Without dead ends: 1518 [2021-11-03 05:13:08,986 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:13:08,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1518 states. [2021-11-03 05:13:09,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1518 to 1170. [2021-11-03 05:13:09,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 735 states have (on average 1.873469387755102) internal successors, (1377), 1169 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:09,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 1377 transitions. [2021-11-03 05:13:09,020 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 1377 transitions. Word has length 14 [2021-11-03 05:13:09,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:13:09,020 INFO L470 AbstractCegarLoop]: Abstraction has 1170 states and 1377 transitions. [2021-11-03 05:13:09,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:09,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 1377 transitions. [2021-11-03 05:13:09,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-03 05:13:09,022 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:13:09,022 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:13:09,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 05:13:09,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:13:09,237 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-03 05:13:09,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:13:09,237 INFO L85 PathProgramCache]: Analyzing trace with hash -520774338, now seen corresponding path program 1 times [2021-11-03 05:13:09,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:13:09,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1739844887] [2021-11-03 05:13:09,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:13:09,238 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:13:09,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:13:09,239 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:13:09,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 05:13:09,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:13:09,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:13:09,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:13:09,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:13:09,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:13:09,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:13:09,575 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:13:09,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1739844887] [2021-11-03 05:13:09,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1739844887] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:13:09,575 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:13:09,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:13:09,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503751350] [2021-11-03 05:13:09,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:13:09,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:13:09,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:13:09,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:13:09,576 INFO L87 Difference]: Start difference. First operand 1170 states and 1377 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:09,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:13:09,616 INFO L93 Difference]: Finished difference Result 1110 states and 1291 transitions. [2021-11-03 05:13:09,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:13:09,617 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-03 05:13:09,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:13:09,624 INFO L225 Difference]: With dead ends: 1110 [2021-11-03 05:13:09,624 INFO L226 Difference]: Without dead ends: 1110 [2021-11-03 05:13:09,624 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:13:09,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-11-03 05:13:09,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 1110. [2021-11-03 05:13:09,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1110 states, 699 states have (on average 1.8469241773962803) internal successors, (1291), 1109 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:09,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1110 states to 1110 states and 1291 transitions. [2021-11-03 05:13:09,651 INFO L78 Accepts]: Start accepts. Automaton has 1110 states and 1291 transitions. Word has length 18 [2021-11-03 05:13:09,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:13:09,652 INFO L470 AbstractCegarLoop]: Abstraction has 1110 states and 1291 transitions. [2021-11-03 05:13:09,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:09,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1110 states and 1291 transitions. [2021-11-03 05:13:09,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-03 05:13:09,653 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:13:09,653 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:13:09,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 05:13:09,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:13:09,868 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-03 05:13:09,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:13:09,869 INFO L85 PathProgramCache]: Analyzing trace with hash 2047030904, now seen corresponding path program 1 times [2021-11-03 05:13:09,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:13:09,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [842458590] [2021-11-03 05:13:09,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:13:09,870 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:13:09,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:13:09,871 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:13:09,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 05:13:10,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:13:10,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:13:10,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:13:10,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:13:10,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:13:10,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:13:10,192 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:13:10,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [842458590] [2021-11-03 05:13:10,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [842458590] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:13:10,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:13:10,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 05:13:10,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717146905] [2021-11-03 05:13:10,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:13:10,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:13:10,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:13:10,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:13:10,200 INFO L87 Difference]: Start difference. First operand 1110 states and 1291 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:10,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:13:10,311 INFO L93 Difference]: Finished difference Result 1082 states and 1235 transitions. [2021-11-03 05:13:10,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:13:10,311 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-03 05:13:10,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:13:10,318 INFO L225 Difference]: With dead ends: 1082 [2021-11-03 05:13:10,319 INFO L226 Difference]: Without dead ends: 1082 [2021-11-03 05:13:10,319 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:13:10,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2021-11-03 05:13:10,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1080. [2021-11-03 05:13:10,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 683 states have (on average 1.8052708638360175) internal successors, (1233), 1079 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:10,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1233 transitions. [2021-11-03 05:13:10,344 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1233 transitions. Word has length 20 [2021-11-03 05:13:10,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:13:10,345 INFO L470 AbstractCegarLoop]: Abstraction has 1080 states and 1233 transitions. [2021-11-03 05:13:10,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:10,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1233 transitions. [2021-11-03 05:13:10,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-03 05:13:10,347 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:13:10,347 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:13:10,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 05:13:10,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:13:10,566 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-03 05:13:10,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:13:10,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1406589690, now seen corresponding path program 1 times [2021-11-03 05:13:10,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:13:10,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [856750858] [2021-11-03 05:13:10,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:13:10,568 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:13:10,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:13:10,569 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:13:10,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 05:13:10,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:13:10,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:13:10,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:13:10,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 05:13:11,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:13:11,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:13:11,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:13:11,187 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:13:11,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [856750858] [2021-11-03 05:13:11,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [856750858] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:13:11,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:13:11,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 05:13:11,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892766083] [2021-11-03 05:13:11,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:13:11,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:13:11,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:13:11,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:13:11,190 INFO L87 Difference]: Start difference. First operand 1080 states and 1233 transitions. Second operand has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:13,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:13:13,510 INFO L93 Difference]: Finished difference Result 1543 states and 1775 transitions. [2021-11-03 05:13:13,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:13:13,511 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-03 05:13:13,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:13:13,518 INFO L225 Difference]: With dead ends: 1543 [2021-11-03 05:13:13,518 INFO L226 Difference]: Without dead ends: 1543 [2021-11-03 05:13:13,518 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:13:13,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1543 states. [2021-11-03 05:13:13,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1543 to 1076. [2021-11-03 05:13:13,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1076 states, 683 states have (on average 1.7935578330893118) internal successors, (1225), 1075 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:13,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 1225 transitions. [2021-11-03 05:13:13,547 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 1225 transitions. Word has length 34 [2021-11-03 05:13:13,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:13:13,547 INFO L470 AbstractCegarLoop]: Abstraction has 1076 states and 1225 transitions. [2021-11-03 05:13:13,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:13,548 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 1225 transitions. [2021-11-03 05:13:13,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-03 05:13:13,549 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:13:13,549 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:13:13,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 05:13:13,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:13:13,762 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr53REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-03 05:13:13,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:13:13,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1406589689, now seen corresponding path program 1 times [2021-11-03 05:13:13,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:13:13,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1514237039] [2021-11-03 05:13:13,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:13:13,764 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:13:13,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:13:13,766 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:13:13,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 05:13:14,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:13:14,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:13:14,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:13:14,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 05:13:14,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:13:14,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:13:14,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:13:14,975 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:13:14,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1514237039] [2021-11-03 05:13:14,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1514237039] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:13:14,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:13:14,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 05:13:14,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309957345] [2021-11-03 05:13:14,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:13:14,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:13:14,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:13:14,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:13:14,979 INFO L87 Difference]: Start difference. First operand 1076 states and 1225 transitions. Second operand has 6 states, 5 states have (on average 12.8) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:22,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:13:22,717 INFO L93 Difference]: Finished difference Result 1597 states and 1792 transitions. [2021-11-03 05:13:22,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:13:22,718 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-03 05:13:22,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:13:22,727 INFO L225 Difference]: With dead ends: 1597 [2021-11-03 05:13:22,727 INFO L226 Difference]: Without dead ends: 1597 [2021-11-03 05:13:22,727 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:13:22,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1597 states. [2021-11-03 05:13:22,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1597 to 1072. [2021-11-03 05:13:22,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 683 states have (on average 1.7818448023426061) internal successors, (1217), 1071 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:22,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1217 transitions. [2021-11-03 05:13:22,756 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1217 transitions. Word has length 34 [2021-11-03 05:13:22,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:13:22,757 INFO L470 AbstractCegarLoop]: Abstraction has 1072 states and 1217 transitions. [2021-11-03 05:13:22,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:22,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1217 transitions. [2021-11-03 05:13:22,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-03 05:13:22,759 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:13:22,760 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:13:22,794 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-03 05:13:22,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:13:22,995 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-03 05:13:22,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:13:22,996 INFO L85 PathProgramCache]: Analyzing trace with hash -489765179, now seen corresponding path program 1 times [2021-11-03 05:13:22,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:13:22,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1611351206] [2021-11-03 05:13:22,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:13:22,997 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:13:22,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:13:22,998 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:13:22,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 05:13:23,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:13:23,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:13:23,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:13:23,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:13:23,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:13:23,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:13:23,732 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:13:23,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1611351206] [2021-11-03 05:13:23,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1611351206] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:13:23,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:13:23,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 05:13:23,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496724994] [2021-11-03 05:13:23,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:13:23,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:13:23,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:13:23,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:13:23,735 INFO L87 Difference]: Start difference. First operand 1072 states and 1217 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:23,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:13:23,804 INFO L93 Difference]: Finished difference Result 1060 states and 1197 transitions. [2021-11-03 05:13:23,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:13:23,805 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-03 05:13:23,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:13:23,811 INFO L225 Difference]: With dead ends: 1060 [2021-11-03 05:13:23,812 INFO L226 Difference]: Without dead ends: 1060 [2021-11-03 05:13:23,812 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:13:23,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2021-11-03 05:13:23,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 1060. [2021-11-03 05:13:23,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1060 states, 671 states have (on average 1.7839046199701938) internal successors, (1197), 1059 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:23,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1060 states to 1060 states and 1197 transitions. [2021-11-03 05:13:23,835 INFO L78 Accepts]: Start accepts. Automaton has 1060 states and 1197 transitions. Word has length 52 [2021-11-03 05:13:23,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:13:23,836 INFO L470 AbstractCegarLoop]: Abstraction has 1060 states and 1197 transitions. [2021-11-03 05:13:23,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:23,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1060 states and 1197 transitions. [2021-11-03 05:13:23,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 05:13:23,839 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:13:23,839 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:13:23,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 05:13:24,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:13:24,059 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-03 05:13:24,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:13:24,060 INFO L85 PathProgramCache]: Analyzing trace with hash -531678063, now seen corresponding path program 1 times [2021-11-03 05:13:24,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:13:24,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [709829331] [2021-11-03 05:13:24,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:13:24,061 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:13:24,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:13:24,062 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:13:24,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 05:13:24,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:13:24,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 05:13:24,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:13:24,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 05:13:24,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 05:13:25,596 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-03 05:13:25,597 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 29 treesize of output 31 [2021-11-03 05:13:25,624 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-03 05:13:25,625 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 28 treesize of output 24 [2021-11-03 05:13:25,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:13:25,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:13:31,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:13:31,296 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:13:31,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [709829331] [2021-11-03 05:13:31,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [709829331] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:13:31,297 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:13:31,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 05:13:31,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614236087] [2021-11-03 05:13:31,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:13:31,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:13:31,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:13:31,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-03 05:13:31,299 INFO L87 Difference]: Start difference. First operand 1060 states and 1197 transitions. Second operand has 6 states, 5 states have (on average 23.2) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:45,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:13:45,232 INFO L93 Difference]: Finished difference Result 1293 states and 1503 transitions. [2021-11-03 05:13:45,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:13:45,233 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 23.2) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-03 05:13:45,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:13:45,239 INFO L225 Difference]: With dead ends: 1293 [2021-11-03 05:13:45,239 INFO L226 Difference]: Without dead ends: 1293 [2021-11-03 05:13:45,240 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=26, Invalid=28, Unknown=2, NotChecked=0, Total=56 [2021-11-03 05:13:45,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2021-11-03 05:13:45,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 1022. [2021-11-03 05:13:45,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 671 states have (on average 1.7272727272727273) internal successors, (1159), 1021 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:45,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 1159 transitions. [2021-11-03 05:13:45,262 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 1159 transitions. Word has length 60 [2021-11-03 05:13:45,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:13:45,262 INFO L470 AbstractCegarLoop]: Abstraction has 1022 states and 1159 transitions. [2021-11-03 05:13:45,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 23.2) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:45,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 1159 transitions. [2021-11-03 05:13:45,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-03 05:13:45,264 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:13:45,264 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:13:45,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 05:13:45,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:13:45,482 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr76ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-03 05:13:45,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:13:45,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1426362414, now seen corresponding path program 1 times [2021-11-03 05:13:45,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:13:45,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1717696006] [2021-11-03 05:13:45,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:13:45,483 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:13:45,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:13:45,484 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:13:45,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 05:13:45,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:13:45,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:13:45,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:13:46,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 05:13:46,120 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 24 treesize of output 20 [2021-11-03 05:13:46,173 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 26 treesize of output 14 [2021-11-03 05:13:46,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:13:46,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:13:46,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:13:46,425 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:13:46,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1717696006] [2021-11-03 05:13:46,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1717696006] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:13:46,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:13:46,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 05:13:46,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005367671] [2021-11-03 05:13:46,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:13:46,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:13:46,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:13:46,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:13:46,427 INFO L87 Difference]: Start difference. First operand 1022 states and 1159 transitions. Second operand has 6 states, 5 states have (on average 13.2) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:52,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:13:52,357 INFO L93 Difference]: Finished difference Result 1682 states and 1907 transitions. [2021-11-03 05:13:52,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-03 05:13:52,358 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-11-03 05:13:52,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:13:52,365 INFO L225 Difference]: With dead ends: 1682 [2021-11-03 05:13:52,365 INFO L226 Difference]: Without dead ends: 1682 [2021-11-03 05:13:52,366 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 122 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-03 05:13:52,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2021-11-03 05:13:52,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 1021. [2021-11-03 05:13:52,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 671 states have (on average 1.7257824143070044) internal successors, (1158), 1020 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:52,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 1158 transitions. [2021-11-03 05:13:52,389 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 1158 transitions. Word has length 66 [2021-11-03 05:13:52,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:13:52,390 INFO L470 AbstractCegarLoop]: Abstraction has 1021 states and 1158 transitions. [2021-11-03 05:13:52,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:13:52,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 1158 transitions. [2021-11-03 05:13:52,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-03 05:13:52,391 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:13:52,392 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:13:52,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-03 05:13:52,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:13:52,610 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr77ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-03 05:13:52,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:13:52,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1267561538, now seen corresponding path program 1 times [2021-11-03 05:13:52,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:13:52,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1406856868] [2021-11-03 05:13:52,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:13:52,611 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:13:52,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:13:52,612 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:13:52,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 05:13:53,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:13:53,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 05:13:53,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:13:53,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 05:13:53,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-03 05:13:53,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-03 05:13:53,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-03 05:13:53,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-03 05:13:53,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:13:53,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:13:54,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:13:54,320 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:13:54,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1406856868] [2021-11-03 05:13:54,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1406856868] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:13:54,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:13:54,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-03 05:13:54,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325029663] [2021-11-03 05:13:54,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 05:13:54,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:13:54,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 05:13:54,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:13:54,323 INFO L87 Difference]: Start difference. First operand 1021 states and 1158 transitions. Second operand has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:14:10,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:14:10,380 INFO L93 Difference]: Finished difference Result 1533 states and 1721 transitions. [2021-11-03 05:14:10,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-03 05:14:10,382 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 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 [2021-11-03 05:14:10,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:14:10,388 INFO L225 Difference]: With dead ends: 1533 [2021-11-03 05:14:10,388 INFO L226 Difference]: Without dead ends: 1533 [2021-11-03 05:14:10,389 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-11-03 05:14:10,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1533 states. [2021-11-03 05:14:10,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1533 to 1020. [2021-11-03 05:14:10,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1020 states, 671 states have (on average 1.7242921013412817) internal successors, (1157), 1019 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:14:10,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 1157 transitions. [2021-11-03 05:14:10,412 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 1157 transitions. Word has length 67 [2021-11-03 05:14:10,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:14:10,413 INFO L470 AbstractCegarLoop]: Abstraction has 1020 states and 1157 transitions. [2021-11-03 05:14:10,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:14:10,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 1157 transitions. [2021-11-03 05:14:10,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-03 05:14:10,414 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:14:10,415 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:14:10,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-03 05:14:10,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:14:10,630 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-03 05:14:10,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:14:10,631 INFO L85 PathProgramCache]: Analyzing trace with hash -582276570, now seen corresponding path program 1 times [2021-11-03 05:14:10,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:14:10,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [256559607] [2021-11-03 05:14:10,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:14:10,632 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:14:10,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:14:10,633 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:14:10,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 05:14:11,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:14:11,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:14:11,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:14:11,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:14:11,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:14:11,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:14:11,642 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:14:11,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [256559607] [2021-11-03 05:14:11,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [256559607] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:14:11,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:14:11,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:14:11,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772829505] [2021-11-03 05:14:11,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:14:11,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:14:11,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:14:11,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:14:11,644 INFO L87 Difference]: Start difference. First operand 1020 states and 1157 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:14:11,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:14:11,808 INFO L93 Difference]: Finished difference Result 1691 states and 1915 transitions. [2021-11-03 05:14:11,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:14:11,809 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 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 71 [2021-11-03 05:14:11,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:14:11,817 INFO L225 Difference]: With dead ends: 1691 [2021-11-03 05:14:11,817 INFO L226 Difference]: Without dead ends: 1691 [2021-11-03 05:14:11,817 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:14:11,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1691 states. [2021-11-03 05:14:11,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1691 to 1023. [2021-11-03 05:14:11,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 674 states have (on average 1.7210682492581602) internal successors, (1160), 1022 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:14:11,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1160 transitions. [2021-11-03 05:14:11,836 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1160 transitions. Word has length 71 [2021-11-03 05:14:11,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:14:11,836 INFO L470 AbstractCegarLoop]: Abstraction has 1023 states and 1160 transitions. [2021-11-03 05:14:11,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:14:11,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1160 transitions. [2021-11-03 05:14:11,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-03 05:14:11,838 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:14:11,838 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:14:11,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-03 05:14:12,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:14:12,056 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-03 05:14:12,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:14:12,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1283072730, now seen corresponding path program 1 times [2021-11-03 05:14:12,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:14:12,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [113528837] [2021-11-03 05:14:12,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:14:12,057 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:14:12,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:14:12,058 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:14:12,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 05:14:12,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:14:12,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:14:12,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:14:12,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:14:12,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:14:13,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:14:13,184 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:14:13,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [113528837] [2021-11-03 05:14:13,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [113528837] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:14:13,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [929718813] [2021-11-03 05:14:13,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:14:13,185 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:14:13,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:14:13,192 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:14:13,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-03 05:14:14,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:14:14,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:14:14,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:14:14,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:14:14,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:14:14,511 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:14:14,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [929718813] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:14:14,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110158940] [2021-11-03 05:14:14,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:14:14,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:14:14,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:14:14,513 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:14:14,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-03 05:14:15,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:14:15,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:14:15,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:14:15,393 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:14:15,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:14:15,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:14:15,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110158940] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:14:15,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 05:14:15,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2021-11-03 05:14:15,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041588498] [2021-11-03 05:14:15,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 05:14:15,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:14:15,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 05:14:15,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:14:15,565 INFO L87 Difference]: Start difference. First operand 1023 states and 1160 transitions. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:14:16,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:14:16,072 INFO L93 Difference]: Finished difference Result 1697 states and 1921 transitions. [2021-11-03 05:14:16,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 05:14:16,073 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-03 05:14:16,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:14:16,083 INFO L225 Difference]: With dead ends: 1697 [2021-11-03 05:14:16,083 INFO L226 Difference]: Without dead ends: 1697 [2021-11-03 05:14:16,084 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 424 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-11-03 05:14:16,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1697 states. [2021-11-03 05:14:16,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1697 to 1029. [2021-11-03 05:14:16,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 680 states have (on average 1.714705882352941) internal successors, (1166), 1028 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:14:16,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 1166 transitions. [2021-11-03 05:14:16,107 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 1166 transitions. Word has length 73 [2021-11-03 05:14:16,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:14:16,108 INFO L470 AbstractCegarLoop]: Abstraction has 1029 states and 1166 transitions. [2021-11-03 05:14:16,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:14:16,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 1166 transitions. [2021-11-03 05:14:16,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-03 05:14:16,109 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:14:16,109 INFO L513 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:14:16,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-03 05:14:16,334 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-11-03 05:14:16,541 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-03 05:14:16,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:14:16,731 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-03 05:14:16,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:14:16,732 INFO L85 PathProgramCache]: Analyzing trace with hash -376896730, now seen corresponding path program 2 times [2021-11-03 05:14:16,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:14:16,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [922916222] [2021-11-03 05:14:16,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 05:14:16,733 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:14:16,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:14:16,735 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:14:16,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-03 05:14:17,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 05:14:17,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:14:17,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 05:14:17,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:14:18,319 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:14:18,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:14:18,901 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:14:18,901 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:14:18,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [922916222] [2021-11-03 05:14:18,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [922916222] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:14:18,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [553147921] [2021-11-03 05:14:18,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 05:14:18,902 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:14:18,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:14:18,906 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:14:18,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-03 05:14:20,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 05:14:20,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:14:20,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 05:14:20,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:14:20,691 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:14:20,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:14:20,852 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:14:20,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [553147921] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:14:20,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304743687] [2021-11-03 05:14:20,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 05:14:20,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:14:20,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:14:20,854 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:14:20,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-03 05:15:13,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 05:15:13,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:15:13,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-03 05:15:13,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:15:13,584 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-03 05:15:13,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-11-03 05:15:13,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 05:15:13,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-03 05:15:13,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-03 05:15:14,130 INFO L354 Elim1Store]: treesize reduction 37, result has 19.6 percent of original size [2021-11-03 05:15:14,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 67 [2021-11-03 05:15:14,161 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-03 05:15:14,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 51 [2021-11-03 05:15:14,931 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-03 05:15:14,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 90 [2021-11-03 05:15:14,991 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-03 05:15:14,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 74 [2021-11-03 05:15:16,840 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-03 05:15:16,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 90 [2021-11-03 05:15:17,473 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-03 05:15:17,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 74 [2021-11-03 05:15:17,730 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-03 05:15:17,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 90 [2021-11-03 05:15:19,466 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-03 05:15:19,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 74 [2021-11-03 05:15:20,780 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-03 05:15:20,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 90 [2021-11-03 05:15:22,824 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-03 05:15:22,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 74 [2021-11-03 05:15:23,099 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-03 05:15:23,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 115 treesize of output 78 [2021-11-03 05:15:25,538 INFO L354 Elim1Store]: treesize reduction 104, result has 19.4 percent of original size [2021-11-03 05:15:25,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 101 [2021-11-03 05:15:26,001 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-03 05:15:26,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 113 treesize of output 62 [2021-11-03 05:15:26,022 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-03 05:15:26,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 26 [2021-11-03 05:15:26,096 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-03 05:15:26,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:16:23,215 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_#Ultimate.C_memset_#t~loopctr239| (_ BitVec 32)) (v_subst_10 (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#ptr.offset| (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#value| (_ BitVec 32))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base| (let ((.cse1 ((_ zero_extend 24) ((_ extract 7 0) |ULTIMATE.start_#Ultimate.C_memset_#value|)))) (store (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base|) (bvadd |ULTIMATE.start_#Ultimate.C_memset_#t~loopctr239| |ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) .cse1) (bvadd v_subst_10 |ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) .cse1))) c_ULTIMATE.start_main_~user~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_main_~user~0.offset)))) (bvule (bvadd (_ bv16 32) .cse0) (bvadd .cse0 (_ bv20 32))))) (forall ((|ULTIMATE.start_#Ultimate.C_memset_#t~loopctr239| (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#ptr.offset| (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#value| (_ BitVec 32)) (v_subst_9 (_ BitVec 32))) (let ((.cse2 (bvadd |ULTIMATE.start_#Ultimate.C_memset_#t~loopctr239| |ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|)) (.cse4 (bvadd v_subst_9 |ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|)) (.cse5 (bvadd (_ bv8 32) c_ULTIMATE.start_main_~user~0.offset))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base| (let ((.cse3 ((_ zero_extend 24) ((_ extract 7 0) |ULTIMATE.start_#Ultimate.C_memset_#value|)))) (store (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base|) .cse2 .cse3) .cse4 .cse3))) c_ULTIMATE.start_main_~user~0.base) .cse5) (_ bv20 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base| (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base|) .cse2 (_ bv0 32)) .cse4 (_ bv0 32))) c_ULTIMATE.start_main_~user~0.base) .cse5)))))) is different from false [2021-11-03 05:16:51,312 WARN L207 SmtUtils]: Spent 6.71 s on a formula simplification that was a NOOP. DAG size: 47 [2021-11-03 05:16:54,287 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 26 treesize of output 24 [2021-11-03 05:16:54,569 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 6 not checked. [2021-11-03 05:16:54,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304743687] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:16:54,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 05:16:54,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 9] total 33 [2021-11-03 05:16:54,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280874495] [2021-11-03 05:16:54,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-03 05:16:54,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:16:54,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-03 05:16:54,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=840, Unknown=5, NotChecked=60, Total=1056 [2021-11-03 05:16:54,573 INFO L87 Difference]: Start difference. First operand 1029 states and 1166 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:17:22,290 WARN L207 SmtUtils]: Spent 7.77 s on a formula simplification that was a NOOP. DAG size: 51 [2021-11-03 05:19:14,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:19:14,844 INFO L93 Difference]: Finished difference Result 1978 states and 2276 transitions. [2021-11-03 05:19:14,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-03 05:19:14,845 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 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 77 [2021-11-03 05:19:14,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:19:14,855 INFO L225 Difference]: With dead ends: 1978 [2021-11-03 05:19:14,855 INFO L226 Difference]: Without dead ends: 1978 [2021-11-03 05:19:14,857 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 417 SyntacticMatches, 9 SemanticMatches, 68 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 114.6s TimeCoverageRelationStatistics Valid=977, Invalid=3712, Unknown=7, NotChecked=134, Total=4830 [2021-11-03 05:19:14,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1978 states. [2021-11-03 05:19:14,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1978 to 1040. [2021-11-03 05:19:14,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 692 states have (on average 1.7008670520231215) internal successors, (1177), 1039 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:19:14,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 1177 transitions. [2021-11-03 05:19:14,875 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 1177 transitions. Word has length 77 [2021-11-03 05:19:14,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:19:14,876 INFO L470 AbstractCegarLoop]: Abstraction has 1040 states and 1177 transitions. [2021-11-03 05:19:14,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:19:14,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 1177 transitions. [2021-11-03 05:19:14,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-03 05:19:14,877 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:19:14,878 INFO L513 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] [2021-11-03 05:19:14,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2021-11-03 05:19:15,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-03 05:19:15,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-03 05:19:15,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:19:15,485 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr80REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-03 05:19:15,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:19:15,485 INFO L85 PathProgramCache]: Analyzing trace with hash 688279333, now seen corresponding path program 1 times [2021-11-03 05:19:15,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:19:15,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [946551439] [2021-11-03 05:19:15,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:19:15,486 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:19:15,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:19:15,487 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:19:15,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-03 05:19:16,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:19:16,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 05:19:16,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:19:17,270 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:19:17,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:19:19,286 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:19:19,286 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:19:19,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [946551439] [2021-11-03 05:19:19,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [946551439] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:19:19,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1762507602] [2021-11-03 05:19:19,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:19:19,287 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:19:19,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:19:19,288 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:19:19,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-03 05:19:20,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:19:20,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 05:19:20,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:19:20,803 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:19:20,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:19:21,063 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:19:21,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1762507602] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:19:21,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93886911] [2021-11-03 05:19:21,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:19:21,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:19:21,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:19:21,065 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:19:21,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-03 05:19:22,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:19:22,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 05:19:22,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:19:22,499 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:19:22,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:19:22,793 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:19:22,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93886911] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:19:22,794 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 05:19:22,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18, 18, 18, 18] total 34 [2021-11-03 05:19:22,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184857701] [2021-11-03 05:19:22,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-03 05:19:22,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:19:22,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-03 05:19:22,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-11-03 05:19:22,796 INFO L87 Difference]: Start difference. First operand 1040 states and 1177 transitions. Second operand has 34 states, 34 states have (on average 3.0294117647058822) internal successors, (103), 34 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:19:41,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:19:41,347 INFO L93 Difference]: Finished difference Result 1732 states and 1956 transitions. [2021-11-03 05:19:41,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-03 05:19:41,348 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.0294117647058822) internal successors, (103), 34 states have internal predecessors, (103), 0 states have call successors, (0), 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 85 [2021-11-03 05:19:41,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:19:41,356 INFO L225 Difference]: With dead ends: 1732 [2021-11-03 05:19:41,356 INFO L226 Difference]: Without dead ends: 1732 [2021-11-03 05:19:41,358 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 915 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=1446, Invalid=2586, Unknown=0, NotChecked=0, Total=4032 [2021-11-03 05:19:41,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1732 states. [2021-11-03 05:19:41,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1732 to 1064. [2021-11-03 05:19:41,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1064 states, 716 states have (on average 1.6773743016759777) internal successors, (1201), 1063 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:19:41,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1201 transitions. [2021-11-03 05:19:41,392 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1201 transitions. Word has length 85 [2021-11-03 05:19:41,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:19:41,392 INFO L470 AbstractCegarLoop]: Abstraction has 1064 states and 1201 transitions. [2021-11-03 05:19:41,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.0294117647058822) internal successors, (103), 34 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:19:41,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1201 transitions. [2021-11-03 05:19:41,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-03 05:19:41,393 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:19:41,393 INFO L513 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:19:41,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-03 05:19:41,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-03 05:19:41,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-03 05:19:41,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:19:41,994 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr80REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-03 05:19:41,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:19:41,995 INFO L85 PathProgramCache]: Analyzing trace with hash -2300123, now seen corresponding path program 2 times [2021-11-03 05:19:41,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:19:41,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1761787609] [2021-11-03 05:19:41,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 05:19:41,996 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:19:41,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:19:41,999 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:19:42,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-03 05:19:43,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 05:19:43,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:19:43,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-03 05:19:43,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:19:45,963 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:19:45,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:19:51,162 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:19:51,162 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:19:51,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1761787609] [2021-11-03 05:19:51,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1761787609] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:19:51,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1406058701] [2021-11-03 05:19:51,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 05:19:51,163 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:19:51,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:19:51,164 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:19:51,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-03 05:19:53,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 05:19:53,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:19:53,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-03 05:19:53,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:19:53,660 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:19:53,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:19:54,023 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:19:54,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1406058701] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:19:54,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870501782] [2021-11-03 05:19:54,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 05:19:54,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:19:54,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:19:54,030 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:19:54,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1354b734-35d9-4696-9be0-55d9bb81cc37/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-03 05:20:28,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 05:20:28,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:20:28,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-03 05:20:28,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:20:29,474 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-03 05:20:29,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-11-03 05:20:29,655 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 18 treesize of output 14 [2021-11-03 05:20:30,605 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-03 05:20:30,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 26 [2021-11-03 05:20:31,835 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:20:31,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:20:33,044 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:20:33,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:20:33,887 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:20:33,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:20:34,242 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:20:34,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:20:34,620 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:20:34,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:20:38,491 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:20:38,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:20:38,862 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:20:38,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:20:40,451 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:20:40,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:20:40,833 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:20:40,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:20:42,498 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:20:42,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:20:42,859 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:20:42,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:20:43,232 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:20:43,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:20:45,391 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:20:45,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:20:45,763 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:20:45,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:20:47,714 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:20:47,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:20:50,118 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:20:50,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:20:50,474 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:20:50,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:20:50,861 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:20:50,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:20:51,266 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:20:51,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:20:54,484 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:20:54,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:20:55,940 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:20:55,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:20:56,297 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:20:56,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:20:58,010 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:20:58,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:21:00,382 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:21:00,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:21:00,793 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:21:00,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:21:01,183 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:21:01,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:21:02,674 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:21:02,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:21:03,029 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:21:03,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:21:03,431 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-03 05:21:03,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 47 [2021-11-03 05:21:03,873 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-03 05:21:03,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 27 [2021-11-03 05:21:04,029 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 29 proven. 30 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2021-11-03 05:21:04,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:21:06,400 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_#Ultimate.C_memset_#t~loopctr239| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base|) (bvadd |ULTIMATE.start_#Ultimate.C_memset_#t~loopctr239| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) (_ bv0 32))) c_ULTIMATE.start_main_~user~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_main_~user~0.offset)))))))))))) (_ bv1 1)))) is different from false [2021-11-03 05:21:08,425 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_#Ultimate.C_memset_#t~loopctr239| (_ BitVec 32)) (|v_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr239_312| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base| (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base|) (bvadd |ULTIMATE.start_#Ultimate.C_memset_#t~loopctr239| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) (_ bv0 32)) (bvadd |v_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr239_312| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) (_ bv0 32))) c_ULTIMATE.start_main_~user~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_main_~user~0.offset)))))))))))))) (_ bv1 1)))) is different from false [2021-11-03 05:22:45,476 INFO L354 Elim1Store]: treesize reduction 5, result has 87.2 percent of original size [2021-11-03 05:22:45,476 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 64 treesize of output 63 [2021-11-03 05:22:55,251 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 31 proven. 28 refuted. 46 times theorem prover too weak. 301 trivial. 59 not checked. [2021-11-03 05:22:55,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870501782] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:22:55,252 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 05:22:55,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34, 34, 10, 13] total 86 [2021-11-03 05:22:55,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630367358] [2021-11-03 05:22:55,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-11-03 05:22:55,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:22:55,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-11-03 05:22:55,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1074, Invalid=5894, Unknown=12, NotChecked=330, Total=7310 [2021-11-03 05:22:55,256 INFO L87 Difference]: Start difference. First operand 1064 states and 1201 transitions. Second operand has 86 states, 86 states have (on average 3.1627906976744184) internal successors, (272), 86 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)