./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test3-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/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_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test3-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/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_877bb80b-bb63-4dcb-9113-93566e7991af/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 eb2eb63835edf753d5a467feb7a4cdd6d105155177d7d0cab8bf29c1b74dbaf6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:18:05,006 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:18:05,009 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:18:05,065 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:18:05,066 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:18:05,070 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:18:05,074 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:18:05,078 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:18:05,081 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:18:05,088 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:18:05,089 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:18:05,091 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:18:05,091 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:18:05,094 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:18:05,096 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:18:05,100 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:18:05,102 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:18:05,103 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:18:05,108 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:18:05,110 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:18:05,111 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:18:05,115 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:18:05,117 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:18:05,123 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:18:05,131 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:18:05,132 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:18:05,132 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:18:05,134 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:18:05,135 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:18:05,136 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:18:05,136 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:18:05,137 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:18:05,139 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:18:05,140 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:18:05,142 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:18:05,142 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:18:05,142 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:18:05,143 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:18:05,143 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:18:05,144 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:18:05,144 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:18:05,147 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-03 05:18:05,195 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:18:05,195 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:18:05,196 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:18:05,196 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:18:05,197 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:18:05,203 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:18:05,203 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:18:05,203 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:18:05,204 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:18:05,204 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:18:05,205 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:18:05,205 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:18:05,205 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:18:05,206 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:18:05,206 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:18:05,206 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 05:18:05,207 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 05:18:05,207 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:18:05,207 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:18:05,207 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 05:18:05,208 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:18:05,208 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:18:05,208 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:18:05,208 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 05:18:05,208 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 05:18:05,209 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 05:18:05,211 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:18:05,211 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:18:05,211 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:18:05,211 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:18:05,211 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:18:05,212 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:18:05,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:18:05,212 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:18:05,212 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:18:05,213 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:18:05,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:18:05,213 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:18:05,213 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:18:05,213 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_877bb80b-bb63-4dcb-9113-93566e7991af/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eb2eb63835edf753d5a467feb7a4cdd6d105155177d7d0cab8bf29c1b74dbaf6 [2021-11-03 05:18:05,459 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:18:05,482 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:18:05,485 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:18:05,486 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:18:05,486 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:18:05,487 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test3-1.i [2021-11-03 05:18:05,564 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/data/28f4d516e/d22402b0271b48deaaf0ab037eeb8d84/FLAG29d82dedf [2021-11-03 05:18:06,227 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:18:06,229 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test3-1.i [2021-11-03 05:18:06,256 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/data/28f4d516e/d22402b0271b48deaaf0ab037eeb8d84/FLAG29d82dedf [2021-11-03 05:18:06,439 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/data/28f4d516e/d22402b0271b48deaaf0ab037eeb8d84 [2021-11-03 05:18:06,442 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:18:06,444 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:18:06,447 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:18:06,448 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:18:06,451 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:18:06,452 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:18:06" (1/1) ... [2021-11-03 05:18:06,453 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@259a02cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:18:06, skipping insertion in model container [2021-11-03 05:18:06,454 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:18:06" (1/1) ... [2021-11-03 05:18:06,460 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:18:06,532 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:18:06,972 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_877bb80b-bb63-4dcb-9113-93566e7991af/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test3-1.i[33021,33034] [2021-11-03 05:18:07,097 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_877bb80b-bb63-4dcb-9113-93566e7991af/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test3-1.i[44590,44603] [2021-11-03 05:18:07,111 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:18:07,122 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 05:18:07,132 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@746375ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:18:07, skipping insertion in model container [2021-11-03 05:18:07,132 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:18:07,132 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 05:18:07,135 INFO L168 Benchmark]: Toolchain (without parser) took 689.64 ms. Allocated memory is still 83.9 MB. Free memory was 42.3 MB in the beginning and 48.9 MB in the end (delta: -6.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-03 05:18:07,136 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 83.9 MB. Free memory is still 61.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:18:07,137 INFO L168 Benchmark]: CACSL2BoogieTranslator took 685.27 ms. Allocated memory is still 83.9 MB. Free memory was 42.1 MB in the beginning and 48.9 MB in the end (delta: -6.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-03 05:18:07,140 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 83.9 MB. Free memory is still 61.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 685.27 ms. Allocated memory is still 83.9 MB. Free memory was 42.1 MB in the beginning and 48.9 MB in the end (delta: -6.9 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: 736]: 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_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/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_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test3-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/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_877bb80b-bb63-4dcb-9113-93566e7991af/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 eb2eb63835edf753d5a467feb7a4cdd6d105155177d7d0cab8bf29c1b74dbaf6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:18:09,297 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:18:09,299 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:18:09,334 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:18:09,334 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:18:09,335 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:18:09,337 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:18:09,339 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:18:09,342 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:18:09,343 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:18:09,344 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:18:09,345 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:18:09,345 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:18:09,347 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:18:09,348 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:18:09,349 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:18:09,350 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:18:09,351 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:18:09,353 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:18:09,361 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:18:09,362 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:18:09,364 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:18:09,365 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:18:09,366 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:18:09,369 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:18:09,370 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:18:09,370 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:18:09,371 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:18:09,372 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:18:09,373 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:18:09,373 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:18:09,374 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:18:09,375 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:18:09,376 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:18:09,377 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:18:09,378 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:18:09,378 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:18:09,379 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:18:09,379 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:18:09,380 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:18:09,381 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:18:09,382 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-03 05:18:09,408 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:18:09,409 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:18:09,409 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:18:09,410 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:18:09,410 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:18:09,410 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:18:09,410 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:18:09,410 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:18:09,411 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:18:09,411 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 05:18:09,412 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 05:18:09,412 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:18:09,412 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:18:09,412 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 05:18:09,412 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:18:09,413 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:18:09,413 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:18:09,413 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 05:18:09,413 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 05:18:09,413 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 05:18:09,414 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:18:09,414 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:18:09,414 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 05:18:09,414 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 05:18:09,414 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:18:09,415 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:18:09,415 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:18:09,415 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 05:18:09,415 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:18:09,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:18:09,416 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:18:09,416 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:18:09,416 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 05:18:09,416 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 05:18:09,417 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:18:09,417 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:18:09,417 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_877bb80b-bb63-4dcb-9113-93566e7991af/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eb2eb63835edf753d5a467feb7a4cdd6d105155177d7d0cab8bf29c1b74dbaf6 [2021-11-03 05:18:09,794 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:18:09,820 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:18:09,824 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:18:09,825 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:18:09,825 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:18:09,826 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test3-1.i [2021-11-03 05:18:09,900 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/data/f3205f1a1/67fd61ce0649494c82b9a4482eb82ae5/FLAGda8138aae [2021-11-03 05:18:10,545 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:18:10,546 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test3-1.i [2021-11-03 05:18:10,563 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/data/f3205f1a1/67fd61ce0649494c82b9a4482eb82ae5/FLAGda8138aae [2021-11-03 05:18:10,788 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/data/f3205f1a1/67fd61ce0649494c82b9a4482eb82ae5 [2021-11-03 05:18:10,791 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:18:10,792 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:18:10,794 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:18:10,794 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:18:10,797 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:18:10,798 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:18:10" (1/1) ... [2021-11-03 05:18:10,799 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3da4d346 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:18:10, skipping insertion in model container [2021-11-03 05:18:10,799 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:18:10" (1/1) ... [2021-11-03 05:18:10,806 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:18:10,867 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:18:11,298 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_877bb80b-bb63-4dcb-9113-93566e7991af/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test3-1.i[33021,33034] [2021-11-03 05:18:11,402 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_877bb80b-bb63-4dcb-9113-93566e7991af/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test3-1.i[44590,44603] [2021-11-03 05:18:11,416 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:18:11,434 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 05:18:11,475 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:18:11,517 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_877bb80b-bb63-4dcb-9113-93566e7991af/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test3-1.i[33021,33034] [2021-11-03 05:18:11,650 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_877bb80b-bb63-4dcb-9113-93566e7991af/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test3-1.i[44590,44603] [2021-11-03 05:18:11,662 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:18:11,677 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:18:11,705 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_877bb80b-bb63-4dcb-9113-93566e7991af/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test3-1.i[33021,33034] [2021-11-03 05:18:11,756 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_877bb80b-bb63-4dcb-9113-93566e7991af/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test3-1.i[44590,44603] [2021-11-03 05:18:11,758 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:18:11,819 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:18:11,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:18:11 WrapperNode [2021-11-03 05:18:11,819 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:18:11,820 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:18:11,821 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:18:11,821 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:18:11,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:18:11" (1/1) ... [2021-11-03 05:18:11,861 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:18:11" (1/1) ... [2021-11-03 05:18:11,926 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:18:11,927 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:18:11,927 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:18:11,927 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:18:11,935 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:18:11" (1/1) ... [2021-11-03 05:18:11,935 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:18:11" (1/1) ... [2021-11-03 05:18:11,946 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:18:11" (1/1) ... [2021-11-03 05:18:11,946 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:18:11" (1/1) ... [2021-11-03 05:18:12,001 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:18:11" (1/1) ... [2021-11-03 05:18:12,016 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:18:11" (1/1) ... [2021-11-03 05:18:12,022 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:18:11" (1/1) ... [2021-11-03 05:18:12,032 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:18:12,035 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:18:12,035 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:18:12,035 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:18:12,036 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:18:11" (1/1) ... [2021-11-03 05:18:12,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:18:12,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:18:12,075 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:18:12,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:18:12,112 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-03 05:18:12,112 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 05:18:12,112 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 05:18:12,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 05:18:12,113 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:18:12,113 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-03 05:18:12,113 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 05:18:12,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 05:18:12,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 05:18:12,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 05:18:12,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:18:12,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:18:16,884 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:18:16,884 INFO L299 CfgBuilder]: Removed 85 assume(true) statements. [2021-11-03 05:18:16,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:18:16 BoogieIcfgContainer [2021-11-03 05:18:16,888 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:18:16,890 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:18:16,890 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:18:16,893 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:18:16,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:18:10" (1/3) ... [2021-11-03 05:18:16,894 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d9d2fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:18:16, skipping insertion in model container [2021-11-03 05:18:16,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:18:11" (2/3) ... [2021-11-03 05:18:16,894 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d9d2fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:18:16, skipping insertion in model container [2021-11-03 05:18:16,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:18:16" (3/3) ... [2021-11-03 05:18:16,896 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_BER_test3-1.i [2021-11-03 05:18:16,901 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:18:16,901 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 538 error locations. [2021-11-03 05:18:16,944 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:18:16,950 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 05:18:16,950 INFO L340 AbstractCegarLoop]: Starting to check reachability of 538 error locations. [2021-11-03 05:18:16,987 INFO L276 IsEmpty]: Start isEmpty. Operand has 1080 states, 541 states have (on average 2.243992606284658) internal successors, (1214), 1079 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states 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 05:18:16,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-03 05:18:16,992 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:18:16,993 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-03 05:18:16,993 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 534 more)] === [2021-11-03 05:18:16,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:18:16,999 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-11-03 05:18:17,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:18:17,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [98255697] [2021-11-03 05:18:17,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:17,011 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:18:17,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:18:17,014 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:18:17,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 05:18:17,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:18:17,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:18:17,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:18:17,291 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 05:18:17,302 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 05:18:17,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:18:17,335 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 05:18:17,335 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:18:17,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [98255697] [2021-11-03 05:18:17,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [98255697] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:18:17,336 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:18:17,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 05:18:17,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110160000] [2021-11-03 05:18:17,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:18:17,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:18:17,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:18:17,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:18:17,384 INFO L87 Difference]: Start difference. First operand has 1080 states, 541 states have (on average 2.243992606284658) internal successors, (1214), 1079 states have internal predecessors, (1214), 0 states have call successors, (0), 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 05:18:19,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:18:19,268 INFO L93 Difference]: Finished difference Result 1075 states and 1136 transitions. [2021-11-03 05:18:19,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:18:19,272 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 05:18:19,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:18:19,295 INFO L225 Difference]: With dead ends: 1075 [2021-11-03 05:18:19,295 INFO L226 Difference]: Without dead ends: 1073 [2021-11-03 05:18:19,296 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 05:18:19,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2021-11-03 05:18:19,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 1065. [2021-11-03 05:18:19,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1065 states, 541 states have (on average 2.0831792975970425) internal successors, (1127), 1064 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states 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 05:18:19,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 1127 transitions. [2021-11-03 05:18:19,443 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 1127 transitions. Word has length 3 [2021-11-03 05:18:19,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:18:19,443 INFO L470 AbstractCegarLoop]: Abstraction has 1065 states and 1127 transitions. [2021-11-03 05:18:19,444 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 05:18:19,444 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 1127 transitions. [2021-11-03 05:18:19,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-03 05:18:19,444 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:18:19,445 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-03 05:18:19,459 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-03 05:18:19,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:18:19,661 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 534 more)] === [2021-11-03 05:18:19,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:18:19,665 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-11-03 05:18:19,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:18:19,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1050876660] [2021-11-03 05:18:19,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:19,669 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:18:19,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:18:19,671 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:18:19,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 05:18:19,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:18:19,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:18:19,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:18:19,820 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 05:18:19,832 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 05:18:19,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:18:19,894 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 05:18:19,895 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:18:19,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1050876660] [2021-11-03 05:18:19,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1050876660] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:18:19,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:18:19,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 05:18:19,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703380241] [2021-11-03 05:18:19,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:18:19,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:18:19,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:18:19,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:18:19,903 INFO L87 Difference]: Start difference. First operand 1065 states and 1127 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 05:18:24,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:18:24,421 INFO L93 Difference]: Finished difference Result 1560 states and 1660 transitions. [2021-11-03 05:18:24,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:18:24,422 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 05:18:24,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:18:24,430 INFO L225 Difference]: With dead ends: 1560 [2021-11-03 05:18:24,431 INFO L226 Difference]: Without dead ends: 1560 [2021-11-03 05:18:24,431 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 05:18:24,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2021-11-03 05:18:24,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 1100. [2021-11-03 05:18:24,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1100 states, 585 states have (on average 2.0615384615384613) internal successors, (1206), 1099 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states 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 05:18:24,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 1206 transitions. [2021-11-03 05:18:24,461 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 1206 transitions. Word has length 3 [2021-11-03 05:18:24,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:18:24,462 INFO L470 AbstractCegarLoop]: Abstraction has 1100 states and 1206 transitions. [2021-11-03 05:18:24,462 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 05:18:24,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 1206 transitions. [2021-11-03 05:18:24,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 05:18:24,463 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:18:24,463 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:18:24,474 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-03 05:18:24,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:18:24,673 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 534 more)] === [2021-11-03 05:18:24,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:18:24,674 INFO L85 PathProgramCache]: Analyzing trace with hash 62249618, now seen corresponding path program 1 times [2021-11-03 05:18:24,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:18:24,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [243523427] [2021-11-03 05:18:24,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:24,675 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:18:24,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:18:24,676 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:18:24,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 05:18:24,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:18:24,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:18:24,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:18:24,817 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 05:18:24,842 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 05:18:24,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:18:24,890 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 05:18:24,891 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:18:24,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [243523427] [2021-11-03 05:18:24,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [243523427] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:18:24,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:18:24,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 05:18:24,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340226487] [2021-11-03 05:18:24,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:18:24,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:18:24,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:18:24,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:18:24,899 INFO L87 Difference]: Start difference. First operand 1100 states and 1206 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 05:18:26,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:18:26,778 INFO L93 Difference]: Finished difference Result 1428 states and 1559 transitions. [2021-11-03 05:18:26,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:18:26,778 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 05:18:26,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:18:26,785 INFO L225 Difference]: With dead ends: 1428 [2021-11-03 05:18:26,786 INFO L226 Difference]: Without dead ends: 1428 [2021-11-03 05:18:26,786 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 05:18:26,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2021-11-03 05:18:26,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1051. [2021-11-03 05:18:26,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1051 states, 585 states have (on average 1.9726495726495727) internal successors, (1154), 1050 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states 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 05:18:26,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 1154 transitions. [2021-11-03 05:18:26,815 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 1154 transitions. Word has length 8 [2021-11-03 05:18:26,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:18:26,816 INFO L470 AbstractCegarLoop]: Abstraction has 1051 states and 1154 transitions. [2021-11-03 05:18:26,816 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 05:18:26,816 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 1154 transitions. [2021-11-03 05:18:26,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 05:18:26,817 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:18:26,817 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:18:26,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 05:18:27,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:18:27,028 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 534 more)] === [2021-11-03 05:18:27,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:18:27,029 INFO L85 PathProgramCache]: Analyzing trace with hash 62249619, now seen corresponding path program 1 times [2021-11-03 05:18:27,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:18:27,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1706387792] [2021-11-03 05:18:27,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:27,030 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:18:27,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:18:27,031 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:18:27,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 05:18:27,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:18:27,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:18:27,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:18:27,197 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 05:18:27,232 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 05:18:27,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:18:27,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:18:27,324 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:18:27,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1706387792] [2021-11-03 05:18:27,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1706387792] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:18:27,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:18:27,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 05:18:27,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144474299] [2021-11-03 05:18:27,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:18:27,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:18:27,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:18:27,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:18:27,326 INFO L87 Difference]: Start difference. First operand 1051 states and 1154 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 05:18:31,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:18:31,453 INFO L93 Difference]: Finished difference Result 1471 states and 1566 transitions. [2021-11-03 05:18:31,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:18:31,454 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 05:18:31,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:18:31,461 INFO L225 Difference]: With dead ends: 1471 [2021-11-03 05:18:31,461 INFO L226 Difference]: Without dead ends: 1471 [2021-11-03 05:18:31,462 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 05:18:31,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1471 states. [2021-11-03 05:18:31,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1471 to 1041. [2021-11-03 05:18:31,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1041 states, 585 states have (on average 1.9504273504273504) internal successors, (1141), 1040 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states 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 05:18:31,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1041 states to 1041 states and 1141 transitions. [2021-11-03 05:18:31,487 INFO L78 Accepts]: Start accepts. Automaton has 1041 states and 1141 transitions. Word has length 8 [2021-11-03 05:18:31,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:18:31,487 INFO L470 AbstractCegarLoop]: Abstraction has 1041 states and 1141 transitions. [2021-11-03 05:18:31,487 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 05:18:31,488 INFO L276 IsEmpty]: Start isEmpty. Operand 1041 states and 1141 transitions. [2021-11-03 05:18:31,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-03 05:18:31,488 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:18:31,488 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:18:31,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 05:18:31,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:18:31,700 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr526REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 534 more)] === [2021-11-03 05:18:31,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:18:31,700 INFO L85 PathProgramCache]: Analyzing trace with hash -945574260, now seen corresponding path program 1 times [2021-11-03 05:18:31,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:18:31,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1023599108] [2021-11-03 05:18:31,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:31,701 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:18:31,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:18:31,702 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:18:31,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 05:18:31,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:18:31,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:18:31,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:18:31,934 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 05:18:31,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:18:32,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:18:32,015 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:18:32,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1023599108] [2021-11-03 05:18:32,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1023599108] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:18:32,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:18:32,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 05:18:32,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227704369] [2021-11-03 05:18:32,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:18:32,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:18:32,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:18:32,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:18:32,017 INFO L87 Difference]: Start difference. First operand 1041 states and 1141 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 05:18:32,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:18:32,793 INFO L93 Difference]: Finished difference Result 1487 states and 1619 transitions. [2021-11-03 05:18:32,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:18:32,794 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 05:18:32,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:18:32,801 INFO L225 Difference]: With dead ends: 1487 [2021-11-03 05:18:32,801 INFO L226 Difference]: Without dead ends: 1487 [2021-11-03 05:18:32,801 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 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 05:18:32,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1487 states. [2021-11-03 05:18:32,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1487 to 1277. [2021-11-03 05:18:32,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1277 states, 821 states have (on average 1.9378806333739342) internal successors, (1591), 1276 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states 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 05:18:32,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1277 states to 1277 states and 1591 transitions. [2021-11-03 05:18:32,830 INFO L78 Accepts]: Start accepts. Automaton has 1277 states and 1591 transitions. Word has length 11 [2021-11-03 05:18:32,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:18:32,831 INFO L470 AbstractCegarLoop]: Abstraction has 1277 states and 1591 transitions. [2021-11-03 05:18:32,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 05:18:32,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1277 states and 1591 transitions. [2021-11-03 05:18:32,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-03 05:18:32,832 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:18:32,832 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:18:32,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 05:18:33,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:18:33,050 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr537ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 534 more)] === [2021-11-03 05:18:33,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:18:33,052 INFO L85 PathProgramCache]: Analyzing trace with hash 751971392, now seen corresponding path program 1 times [2021-11-03 05:18:33,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:18:33,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [455542864] [2021-11-03 05:18:33,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:33,053 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:18:33,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:18:33,054 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:18:33,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 05:18:33,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:18:33,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:18:33,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:18:33,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:18:33,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:18:33,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:18:33,332 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-03 05:18:33,332 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 05:18:33,397 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-03 05:18:33,397 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 05:18:33,425 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 05:18:33,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:18:33,492 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 05:18:33,492 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:18:33,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [455542864] [2021-11-03 05:18:33,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [455542864] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:18:33,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:18:33,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:18:33,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214498899] [2021-11-03 05:18:33,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:18:33,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:18:33,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:18:33,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:18:33,494 INFO L87 Difference]: Start difference. First operand 1277 states and 1591 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 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 05:18:34,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:18:34,855 INFO L93 Difference]: Finished difference Result 1661 states and 2040 transitions. [2021-11-03 05:18:34,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:18:34,856 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 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 12 [2021-11-03 05:18:34,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:18:34,864 INFO L225 Difference]: With dead ends: 1661 [2021-11-03 05:18:34,864 INFO L226 Difference]: Without dead ends: 1661 [2021-11-03 05:18:34,864 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 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 05:18:34,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2021-11-03 05:18:34,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1276. [2021-11-03 05:18:34,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1276 states, 820 states have (on average 1.9378048780487804) internal successors, (1589), 1275 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states 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 05:18:34,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1276 states to 1276 states and 1589 transitions. [2021-11-03 05:18:34,921 INFO L78 Accepts]: Start accepts. Automaton has 1276 states and 1589 transitions. Word has length 12 [2021-11-03 05:18:34,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:18:34,922 INFO L470 AbstractCegarLoop]: Abstraction has 1276 states and 1589 transitions. [2021-11-03 05:18:34,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 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 05:18:34,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1276 states and 1589 transitions. [2021-11-03 05:18:34,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-03 05:18:34,923 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:18:34,923 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 05:18:34,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 05:18:35,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:18:35,135 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 534 more)] === [2021-11-03 05:18:35,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:18:35,136 INFO L85 PathProgramCache]: Analyzing trace with hash -520774338, now seen corresponding path program 1 times [2021-11-03 05:18:35,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:18:35,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1600227188] [2021-11-03 05:18:35,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:35,137 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:18:35,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:18:35,139 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:18:35,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 05:18:35,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:18:35,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:18:35,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:18:35,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:18:35,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:18:35,422 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 05:18:35,422 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:18:35,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1600227188] [2021-11-03 05:18:35,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1600227188] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:18:35,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:18:35,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:18:35,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101947470] [2021-11-03 05:18:35,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:18:35,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:18:35,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:18:35,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:18:35,424 INFO L87 Difference]: Start difference. First operand 1276 states and 1589 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 05:18:35,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:18:35,454 INFO L93 Difference]: Finished difference Result 1216 states and 1503 transitions. [2021-11-03 05:18:35,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:18:35,454 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 05:18:35,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:18:35,460 INFO L225 Difference]: With dead ends: 1216 [2021-11-03 05:18:35,460 INFO L226 Difference]: Without dead ends: 1216 [2021-11-03 05:18:35,460 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 05:18:35,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2021-11-03 05:18:35,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 1216. [2021-11-03 05:18:35,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1216 states, 784 states have (on average 1.9170918367346939) internal successors, (1503), 1215 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states 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 05:18:35,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 1503 transitions. [2021-11-03 05:18:35,484 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 1503 transitions. Word has length 18 [2021-11-03 05:18:35,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:18:35,484 INFO L470 AbstractCegarLoop]: Abstraction has 1216 states and 1503 transitions. [2021-11-03 05:18:35,484 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 05:18:35,485 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 1503 transitions. [2021-11-03 05:18:35,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-03 05:18:35,485 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:18:35,485 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 05:18:35,497 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-03 05:18:35,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:18:35,700 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 534 more)] === [2021-11-03 05:18:35,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:18:35,700 INFO L85 PathProgramCache]: Analyzing trace with hash 2047030904, now seen corresponding path program 1 times [2021-11-03 05:18:35,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:18:35,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1135608371] [2021-11-03 05:18:35,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:35,701 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:18:35,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:18:35,702 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:18:35,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 05:18:35,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:18:35,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:18:35,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:18:35,954 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 05:18:35,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:18:36,001 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 05:18:36,002 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:18:36,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1135608371] [2021-11-03 05:18:36,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1135608371] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:18:36,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:18:36,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 05:18:36,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386530728] [2021-11-03 05:18:36,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:18:36,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:18:36,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:18:36,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:18:36,004 INFO L87 Difference]: Start difference. First operand 1216 states and 1503 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 05:18:36,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:18:36,084 INFO L93 Difference]: Finished difference Result 1188 states and 1447 transitions. [2021-11-03 05:18:36,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:18:36,084 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 05:18:36,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:18:36,090 INFO L225 Difference]: With dead ends: 1188 [2021-11-03 05:18:36,090 INFO L226 Difference]: Without dead ends: 1188 [2021-11-03 05:18:36,090 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 05:18:36,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2021-11-03 05:18:36,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 1186. [2021-11-03 05:18:36,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1186 states, 768 states have (on average 1.8815104166666667) internal successors, (1445), 1185 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states 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 05:18:36,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1186 states to 1186 states and 1445 transitions. [2021-11-03 05:18:36,112 INFO L78 Accepts]: Start accepts. Automaton has 1186 states and 1445 transitions. Word has length 20 [2021-11-03 05:18:36,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:18:36,113 INFO L470 AbstractCegarLoop]: Abstraction has 1186 states and 1445 transitions. [2021-11-03 05:18:36,113 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 05:18:36,113 INFO L276 IsEmpty]: Start isEmpty. Operand 1186 states and 1445 transitions. [2021-11-03 05:18:36,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-03 05:18:36,114 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:18:36,114 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 05:18:36,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 05:18:36,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:18:36,327 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 534 more)] === [2021-11-03 05:18:36,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:18:36,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1406589690, now seen corresponding path program 1 times [2021-11-03 05:18:36,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:18:36,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [644359387] [2021-11-03 05:18:36,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:36,328 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:18:36,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:18:36,329 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:18:36,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 05:18:36,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:18:36,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:18:36,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:18:36,568 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 05:18:36,703 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 05:18:36,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:18:36,836 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 05:18:36,836 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:18:36,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [644359387] [2021-11-03 05:18:36,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [644359387] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:18:36,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:18:36,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 05:18:36,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263233573] [2021-11-03 05:18:36,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:18:36,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:18:36,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:18:36,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:18:36,838 INFO L87 Difference]: Start difference. First operand 1186 states and 1445 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 05:18:38,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:18:38,707 INFO L93 Difference]: Finished difference Result 1678 states and 2063 transitions. [2021-11-03 05:18:38,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:18:38,707 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 05:18:38,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:18:38,714 INFO L225 Difference]: With dead ends: 1678 [2021-11-03 05:18:38,714 INFO L226 Difference]: Without dead ends: 1678 [2021-11-03 05:18:38,715 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 05:18:38,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1678 states. [2021-11-03 05:18:38,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1678 to 1182. [2021-11-03 05:18:38,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1182 states, 768 states have (on average 1.87109375) internal successors, (1437), 1181 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states 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 05:18:38,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 1437 transitions. [2021-11-03 05:18:38,740 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 1437 transitions. Word has length 34 [2021-11-03 05:18:38,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:18:38,740 INFO L470 AbstractCegarLoop]: Abstraction has 1182 states and 1437 transitions. [2021-11-03 05:18:38,740 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 05:18:38,741 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 1437 transitions. [2021-11-03 05:18:38,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-03 05:18:38,742 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:18:38,742 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 05:18:38,767 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-11-03 05:18:38,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:18:38,953 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr53REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 534 more)] === [2021-11-03 05:18:38,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:18:38,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1406589689, now seen corresponding path program 1 times [2021-11-03 05:18:38,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:18:38,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1139121612] [2021-11-03 05:18:38,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:38,954 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:18:38,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:18:38,955 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:18:38,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 05:18:39,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:18:39,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:18:39,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:18:39,205 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 05:18:39,469 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 05:18:39,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:18:39,966 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 05:18:39,966 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:18:39,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1139121612] [2021-11-03 05:18:39,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1139121612] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:18:39,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:18:39,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 05:18:39,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35714743] [2021-11-03 05:18:39,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:18:39,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:18:39,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:18:39,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:18:39,968 INFO L87 Difference]: Start difference. First operand 1182 states and 1437 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 05:18:45,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:18:45,961 INFO L93 Difference]: Finished difference Result 1809 states and 2216 transitions. [2021-11-03 05:18:45,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 05:18:45,962 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 05:18:45,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:18:45,969 INFO L225 Difference]: With dead ends: 1809 [2021-11-03 05:18:45,969 INFO L226 Difference]: Without dead ends: 1809 [2021-11-03 05:18:45,970 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:18:45,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1809 states. [2021-11-03 05:18:45,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1809 to 1178. [2021-11-03 05:18:45,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1178 states, 768 states have (on average 1.8606770833333333) internal successors, (1429), 1177 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states 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 05:18:45,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 1429 transitions. [2021-11-03 05:18:45,994 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 1429 transitions. Word has length 34 [2021-11-03 05:18:45,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:18:45,994 INFO L470 AbstractCegarLoop]: Abstraction has 1178 states and 1429 transitions. [2021-11-03 05:18:45,994 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 05:18:45,995 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 1429 transitions. [2021-11-03 05:18:45,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-03 05:18:45,996 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:18:45,996 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 05:18:46,022 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-11-03 05:18:46,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:18:46,208 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 534 more)] === [2021-11-03 05:18:46,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:18:46,209 INFO L85 PathProgramCache]: Analyzing trace with hash -489765179, now seen corresponding path program 1 times [2021-11-03 05:18:46,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:18:46,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1538385803] [2021-11-03 05:18:46,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:46,210 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:18:46,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:18:46,211 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:18:46,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 05:18:46,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:18:46,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:18:46,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:18:46,614 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 05:18:46,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:18:46,756 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 05:18:46,757 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:18:46,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1538385803] [2021-11-03 05:18:46,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1538385803] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:18:46,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:18:46,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 05:18:46,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869051597] [2021-11-03 05:18:46,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:18:46,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:18:46,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:18:46,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:18:46,759 INFO L87 Difference]: Start difference. First operand 1178 states and 1429 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 05:18:46,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:18:46,814 INFO L93 Difference]: Finished difference Result 1166 states and 1409 transitions. [2021-11-03 05:18:46,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:18:46,814 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 05:18:46,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:18:46,820 INFO L225 Difference]: With dead ends: 1166 [2021-11-03 05:18:46,820 INFO L226 Difference]: Without dead ends: 1166 [2021-11-03 05:18:46,820 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 05:18:46,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2021-11-03 05:18:46,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 1166. [2021-11-03 05:18:46,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1166 states, 756 states have (on average 1.8637566137566137) internal successors, (1409), 1165 states have internal predecessors, (1409), 0 states have call successors, (0), 0 states 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 05:18:46,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 1409 transitions. [2021-11-03 05:18:46,865 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 1409 transitions. Word has length 52 [2021-11-03 05:18:46,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:18:46,866 INFO L470 AbstractCegarLoop]: Abstraction has 1166 states and 1409 transitions. [2021-11-03 05:18:46,866 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 05:18:46,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 1409 transitions. [2021-11-03 05:18:46,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 05:18:46,869 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:18:46,869 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 05:18:46,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 05:18:47,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:18:47,082 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 534 more)] === [2021-11-03 05:18:47,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:18:47,083 INFO L85 PathProgramCache]: Analyzing trace with hash -531678063, now seen corresponding path program 1 times [2021-11-03 05:18:47,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:18:47,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [258897142] [2021-11-03 05:18:47,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:47,085 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:18:47,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:18:47,086 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:18:47,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 05:18:47,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:18:47,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 05:18:47,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:18:47,569 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 05:18:47,577 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 05:18:48,326 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-03 05:18:48,326 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 27 treesize of output 29 [2021-11-03 05:18:48,332 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-03 05:18:48,333 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 26 treesize of output 22 [2021-11-03 05:18:48,364 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 05:18:48,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:18:53,166 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 05:18:53,166 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:18:53,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [258897142] [2021-11-03 05:18:53,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [258897142] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:18:53,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:18:53,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 05:18:53,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157997771] [2021-11-03 05:18:53,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:18:53,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:18:53,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:18:53,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-03 05:18:53,169 INFO L87 Difference]: Start difference. First operand 1166 states and 1409 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 05:19:08,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:19:08,560 INFO L93 Difference]: Finished difference Result 2115 states and 2666 transitions. [2021-11-03 05:19:08,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:19:08,563 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 05:19:08,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:19:08,571 INFO L225 Difference]: With dead ends: 2115 [2021-11-03 05:19:08,571 INFO L226 Difference]: Without dead ends: 2115 [2021-11-03 05:19:08,571 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=26, Invalid=28, Unknown=2, NotChecked=0, Total=56 [2021-11-03 05:19:08,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2115 states. [2021-11-03 05:19:08,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2115 to 1128. [2021-11-03 05:19:08,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 756 states have (on average 1.8134920634920635) internal successors, (1371), 1127 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states 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 05:19:08,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1371 transitions. [2021-11-03 05:19:08,594 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1371 transitions. Word has length 60 [2021-11-03 05:19:08,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:19:08,595 INFO L470 AbstractCegarLoop]: Abstraction has 1128 states and 1371 transitions. [2021-11-03 05:19:08,595 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 05:19:08,595 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1371 transitions. [2021-11-03 05:19:08,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-03 05:19:08,596 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:19:08,596 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 05:19:08,610 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-03 05:19:08,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:19:08,810 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr76ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 534 more)] === [2021-11-03 05:19:08,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:19:08,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1426362414, now seen corresponding path program 1 times [2021-11-03 05:19:08,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:19:08,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [369299715] [2021-11-03 05:19:08,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:19:08,812 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:19:08,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:19:08,813 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:19:08,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 05:19:09,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:19:09,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:19:09,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:19:09,340 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 05:19:09,354 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 05:19:09,388 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 05:19:09,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:19:09,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:19:09,603 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 05:19:09,603 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:19:09,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [369299715] [2021-11-03 05:19:09,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [369299715] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:19:09,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:19:09,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 05:19:09,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459409768] [2021-11-03 05:19:09,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:19:09,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:19:09,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:19:09,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:19:09,605 INFO L87 Difference]: Start difference. First operand 1128 states and 1371 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 05:19:14,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:19:14,201 INFO L93 Difference]: Finished difference Result 1817 states and 2195 transitions. [2021-11-03 05:19:14,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-03 05:19:14,202 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 05:19:14,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:19:14,208 INFO L225 Difference]: With dead ends: 1817 [2021-11-03 05:19:14,208 INFO L226 Difference]: Without dead ends: 1817 [2021-11-03 05:19:14,209 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 122 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-03 05:19:14,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1817 states. [2021-11-03 05:19:14,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1817 to 1127. [2021-11-03 05:19:14,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 756 states have (on average 1.812169312169312) internal successors, (1370), 1126 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states 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 05:19:14,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 1370 transitions. [2021-11-03 05:19:14,228 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 1370 transitions. Word has length 66 [2021-11-03 05:19:14,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:19:14,228 INFO L470 AbstractCegarLoop]: Abstraction has 1127 states and 1370 transitions. [2021-11-03 05:19:14,229 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 05:19:14,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 1370 transitions. [2021-11-03 05:19:14,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-03 05:19:14,230 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:19:14,230 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 05:19:14,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 05:19:14,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:19:14,443 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr77ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 534 more)] === [2021-11-03 05:19:14,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:19:14,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1267561538, now seen corresponding path program 1 times [2021-11-03 05:19:14,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:19:14,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [931512249] [2021-11-03 05:19:14,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:19:14,445 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:19:14,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:19:14,446 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:19:14,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 05:19:14,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:19:14,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 05:19:14,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:19:14,992 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 05:19:15,027 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 05:19:15,035 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 05:19:15,091 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 05:19:15,094 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 05:19:15,180 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 05:19:15,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:19:15,598 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 05:19:15,599 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:19:15,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [931512249] [2021-11-03 05:19:15,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [931512249] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:19:15,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:19:15,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-03 05:19:15,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227488126] [2021-11-03 05:19:15,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 05:19:15,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:19:15,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 05:19:15,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:19:15,600 INFO L87 Difference]: Start difference. First operand 1127 states and 1370 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 05:19:29,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:19:29,124 INFO L93 Difference]: Finished difference Result 1745 states and 2145 transitions. [2021-11-03 05:19:29,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-03 05:19:29,125 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 05:19:29,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:19:29,131 INFO L225 Difference]: With dead ends: 1745 [2021-11-03 05:19:29,131 INFO L226 Difference]: Without dead ends: 1745 [2021-11-03 05:19:29,131 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-11-03 05:19:29,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1745 states. [2021-11-03 05:19:29,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1745 to 1126. [2021-11-03 05:19:29,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 756 states have (on average 1.810846560846561) internal successors, (1369), 1125 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states 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 05:19:29,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1369 transitions. [2021-11-03 05:19:29,149 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1369 transitions. Word has length 67 [2021-11-03 05:19:29,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:19:29,150 INFO L470 AbstractCegarLoop]: Abstraction has 1126 states and 1369 transitions. [2021-11-03 05:19:29,150 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 05:19:29,150 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1369 transitions. [2021-11-03 05:19:29,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-03 05:19:29,151 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:19:29,151 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 05:19:29,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-03 05:19:29,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:19:29,365 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 534 more)] === [2021-11-03 05:19:29,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:19:29,365 INFO L85 PathProgramCache]: Analyzing trace with hash -582276570, now seen corresponding path program 1 times [2021-11-03 05:19:29,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:19:29,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1085176396] [2021-11-03 05:19:29,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:19:29,367 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:19:29,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:19:29,368 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:19:29,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 05:19:29,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:19:29,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:19:29,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:19:30,012 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 05:19:30,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:19:30,148 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 05:19:30,148 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:19:30,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1085176396] [2021-11-03 05:19:30,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1085176396] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:19:30,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:19:30,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:19:30,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227816590] [2021-11-03 05:19:30,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:19:30,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:19:30,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:19:30,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:19:30,150 INFO L87 Difference]: Start difference. First operand 1126 states and 1369 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 05:19:30,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:19:30,332 INFO L93 Difference]: Finished difference Result 1903 states and 2339 transitions. [2021-11-03 05:19:30,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:19:30,332 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 05:19:30,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:19:30,339 INFO L225 Difference]: With dead ends: 1903 [2021-11-03 05:19:30,339 INFO L226 Difference]: Without dead ends: 1903 [2021-11-03 05:19:30,339 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 05:19:30,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1903 states. [2021-11-03 05:19:30,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1903 to 1129. [2021-11-03 05:19:30,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1129 states, 759 states have (on average 1.8076416337285903) internal successors, (1372), 1128 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states 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 05:19:30,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1129 states to 1129 states and 1372 transitions. [2021-11-03 05:19:30,354 INFO L78 Accepts]: Start accepts. Automaton has 1129 states and 1372 transitions. Word has length 71 [2021-11-03 05:19:30,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:19:30,354 INFO L470 AbstractCegarLoop]: Abstraction has 1129 states and 1372 transitions. [2021-11-03 05:19:30,355 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 05:19:30,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1129 states and 1372 transitions. [2021-11-03 05:19:30,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-03 05:19:30,355 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:19:30,356 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 05:19:30,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 05:19:30,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:19:30,556 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 534 more)] === [2021-11-03 05:19:30,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:19:30,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1283072730, now seen corresponding path program 1 times [2021-11-03 05:19:30,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:19:30,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [761402641] [2021-11-03 05:19:30,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:19:30,557 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:19:30,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:19:30,558 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:19:30,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 05:19:31,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:19:31,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:19:31,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:19:31,340 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 05:19:31,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:19:31,568 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 05:19:31,568 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:19:31,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [761402641] [2021-11-03 05:19:31,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [761402641] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:19:31,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1372668535] [2021-11-03 05:19:31,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:19:31,569 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:19:31,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:19:31,571 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:19:31,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-03 05:19:32,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:19:32,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:19:32,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:19:32,503 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 05:19:32,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:19:32,636 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 05:19:32,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1372668535] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:19:32,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572824979] [2021-11-03 05:19:32,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:19:32,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:19:32,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:19:32,641 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:19:32,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-03 05:19:33,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:19:33,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:19:33,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:19:33,387 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 05:19:33,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:19:33,533 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 05:19:33,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572824979] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:19:33,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 05:19:33,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2021-11-03 05:19:33,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524905686] [2021-11-03 05:19:33,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 05:19:33,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:19:33,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 05:19:33,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:19:33,535 INFO L87 Difference]: Start difference. First operand 1129 states and 1372 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 05:19:33,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:19:33,942 INFO L93 Difference]: Finished difference Result 1909 states and 2345 transitions. [2021-11-03 05:19:33,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 05:19:33,943 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 05:19:33,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:19:33,951 INFO L225 Difference]: With dead ends: 1909 [2021-11-03 05:19:33,951 INFO L226 Difference]: Without dead ends: 1909 [2021-11-03 05:19:33,951 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 424 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-11-03 05:19:33,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1909 states. [2021-11-03 05:19:33,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1909 to 1135. [2021-11-03 05:19:33,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 765 states have (on average 1.8013071895424837) internal successors, (1378), 1134 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states 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 05:19:33,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 1378 transitions. [2021-11-03 05:19:33,967 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 1378 transitions. Word has length 73 [2021-11-03 05:19:33,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:19:33,968 INFO L470 AbstractCegarLoop]: Abstraction has 1135 states and 1378 transitions. [2021-11-03 05:19:33,968 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 05:19:33,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 1378 transitions. [2021-11-03 05:19:33,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-03 05:19:33,969 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:19:33,969 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 05:19:34,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-03 05:19:34,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-03 05:19:34,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-03 05:19:34,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 05:19:34,583 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 534 more)] === [2021-11-03 05:19:34,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:19:34,584 INFO L85 PathProgramCache]: Analyzing trace with hash -376896730, now seen corresponding path program 2 times [2021-11-03 05:19:34,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:19:34,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1998460945] [2021-11-03 05:19:34,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 05:19:34,601 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:19:34,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:19:34,602 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:19:34,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-03 05:19:35,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 05:19:35,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:19:35,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 05:19:35,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:19:35,656 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 05:19:35,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:19:36,132 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 05:19:36,132 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:19:36,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1998460945] [2021-11-03 05:19:36,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1998460945] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:19:36,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1569390599] [2021-11-03 05:19:36,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 05:19:36,132 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:19:36,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:19:36,140 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:19:36,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-03 05:19:37,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 05:19:37,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:19:37,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 05:19:37,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:19:37,555 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:19:37,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:19:37,706 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 05:19:37,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1569390599] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:19:37,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886813312] [2021-11-03 05:19:37,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 05:19:37,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:19:37,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:19:37,707 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:19:37,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-03 05:20:04,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 05:20:04,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:20:04,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-03 05:20:04,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:20:04,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 05:20:04,685 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-03 05:20:04,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-11-03 05:20:04,753 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 05:20:04,763 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 05:20:05,156 INFO L354 Elim1Store]: treesize reduction 37, result has 19.6 percent of original size [2021-11-03 05:20:05,156 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 05:20:05,183 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-03 05:20:05,183 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 05:20:05,432 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-03 05:20:05,432 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 90 [2021-11-03 05:20:06,690 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-03 05:20:06,690 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 05:20:06,897 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-03 05:20:06,898 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 05:20:06,949 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-03 05:20:06,950 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 05:20:07,169 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-03 05:20:07,170 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 05:20:07,232 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-03 05:20:07,232 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 05:20:08,815 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-03 05:20:08,815 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 05:20:09,838 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-03 05:20:09,838 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 05:20:10,039 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-03 05:20:10,040 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 05:20:11,634 INFO L354 Elim1Store]: treesize reduction 104, result has 19.4 percent of original size [2021-11-03 05:20:11,635 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 05:20:12,041 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-03 05:20:12,041 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 05:20:12,052 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-03 05:20:12,053 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 05:20:12,103 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 05:20:12,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:20:50,400 WARN L207 SmtUtils]: Spent 6.00 s on a formula simplification that was a NOOP. DAG size: 46 [2021-11-03 05:21:51,957 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 05:21:52,218 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 6 refuted. 6 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-03 05:21:52,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886813312] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:21:52,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 05:21:52,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 10] total 34 [2021-11-03 05:21:52,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097352983] [2021-11-03 05:21:52,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-03 05:21:52,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:21:52,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-03 05:21:52,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=945, Unknown=15, NotChecked=0, Total=1122 [2021-11-03 05:21:52,222 INFO L87 Difference]: Start difference. First operand 1135 states and 1378 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states 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 05:22:36,573 WARN L207 SmtUtils]: Spent 8.10 s on a formula simplification that was a NOOP. DAG size: 62 [2021-11-03 05:23:06,425 WARN L207 SmtUtils]: Spent 5.64 s on a formula simplification that was a NOOP. DAG size: 57 [2021-11-03 05:24:04,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:24:04,475 INFO L93 Difference]: Finished difference Result 2814 states and 3499 transitions. [2021-11-03 05:24:04,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-03 05:24:04,476 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 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 05:24:04,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:24:04,485 INFO L225 Difference]: With dead ends: 2814 [2021-11-03 05:24:04,485 INFO L226 Difference]: Without dead ends: 2814 [2021-11-03 05:24:04,487 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 417 SyntacticMatches, 8 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1380 ImplicationChecksByTransitivity, 150.6s TimeCoverageRelationStatistics Valid=1001, Invalid=3804, Unknown=25, NotChecked=0, Total=4830 [2021-11-03 05:24:04,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2814 states. [2021-11-03 05:24:04,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2814 to 1146. [2021-11-03 05:24:04,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1146 states, 777 states have (on average 1.7876447876447876) internal successors, (1389), 1145 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states 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 05:24:04,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 1389 transitions. [2021-11-03 05:24:04,505 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 1389 transitions. Word has length 77 [2021-11-03 05:24:04,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:24:04,505 INFO L470 AbstractCegarLoop]: Abstraction has 1146 states and 1389 transitions. [2021-11-03 05:24:04,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states 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 05:24:04,506 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 1389 transitions. [2021-11-03 05:24:04,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-03 05:24:04,506 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:24:04,506 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 05:24:04,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-03 05:24:04,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-03 05:24:04,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-03 05:24:05,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:24:05,107 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr80REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 534 more)] === [2021-11-03 05:24:05,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:24:05,107 INFO L85 PathProgramCache]: Analyzing trace with hash 688279333, now seen corresponding path program 1 times [2021-11-03 05:24:05,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:24:05,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1753237857] [2021-11-03 05:24:05,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:24:05,108 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:24:05,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:24:05,109 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:24:05,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-03 05:24:05,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:24:05,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 05:24:05,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:24:06,389 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 05:24:06,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:24:07,717 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 05:24:07,717 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:24:07,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1753237857] [2021-11-03 05:24:07,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1753237857] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:24:07,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [179830495] [2021-11-03 05:24:07,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:24:07,718 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:24:07,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:24:07,723 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:24:07,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-03 05:24:08,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:24:08,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 05:24:08,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:24:09,074 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 05:24:09,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:24:09,294 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 05:24:09,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [179830495] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:24:09,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580277564] [2021-11-03 05:24:09,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:24:09,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:24:09,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:24:09,299 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:24:09,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-03 05:24:10,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:24:10,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 05:24:10,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:24:10,500 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 05:24:10,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:24:10,718 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 05:24:10,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580277564] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:24:10,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 05:24:10,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18, 18, 18, 18] total 34 [2021-11-03 05:24:10,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617664759] [2021-11-03 05:24:10,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-03 05:24:10,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:24:10,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-03 05:24:10,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-11-03 05:24:10,721 INFO L87 Difference]: Start difference. First operand 1146 states and 1389 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 05:24:24,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:24:24,045 INFO L93 Difference]: Finished difference Result 1944 states and 2380 transitions. [2021-11-03 05:24:24,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-03 05:24:24,046 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 05:24:24,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:24:24,049 INFO L225 Difference]: With dead ends: 1944 [2021-11-03 05:24:24,049 INFO L226 Difference]: Without dead ends: 1944 [2021-11-03 05:24:24,051 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 915 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1446, Invalid=2586, Unknown=0, NotChecked=0, Total=4032 [2021-11-03 05:24:24,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2021-11-03 05:24:24,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1170. [2021-11-03 05:24:24,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 801 states have (on average 1.7640449438202248) internal successors, (1413), 1169 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states 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 05:24:24,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 1413 transitions. [2021-11-03 05:24:24,071 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 1413 transitions. Word has length 85 [2021-11-03 05:24:24,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:24:24,072 INFO L470 AbstractCegarLoop]: Abstraction has 1170 states and 1413 transitions. [2021-11-03 05:24:24,072 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 05:24:24,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 1413 transitions. [2021-11-03 05:24:24,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-03 05:24:24,073 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:24:24,073 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 05:24:24,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-03 05:24:24,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-03 05:24:24,505 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-11-03 05:24:24,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:24:24,679 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr80REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 534 more)] === [2021-11-03 05:24:24,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:24:24,679 INFO L85 PathProgramCache]: Analyzing trace with hash -2300123, now seen corresponding path program 2 times [2021-11-03 05:24:24,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:24:24,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [674227830] [2021-11-03 05:24:24,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 05:24:24,680 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:24:24,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:24:24,681 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:24:24,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-03 05:24:25,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 05:24:25,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:24:25,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-03 05:24:25,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:24:27,253 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 05:24:27,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:24:30,979 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 05:24:30,980 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:24:30,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [674227830] [2021-11-03 05:24:30,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [674227830] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:24:30,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2057454292] [2021-11-03 05:24:30,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 05:24:30,980 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:24:30,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:24:30,981 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:24:30,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-03 05:24:32,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 05:24:32,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:24:32,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-03 05:24:32,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:24:33,086 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 05:24:33,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:24:33,342 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 05:24:33,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2057454292] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:24:33,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215384346] [2021-11-03 05:24:33,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 05:24:33,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:24:33,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:24:33,343 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:24:33,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877bb80b-bb63-4dcb-9113-93566e7991af/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-03 05:25:33,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 05:25:33,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:25:33,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-03 05:25:33,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:25:33,793 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-03 05:25:33,794 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 05:25:33,930 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 05:25:34,724 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-03 05:25:34,724 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 05:25:34,993 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:25:34,994 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 05:25:35,352 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:25:35,352 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 05:25:35,634 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:25:35,634 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 05:25:35,887 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:25:35,887 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 05:25:37,285 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:25:37,285 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 05:25:38,650 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:25:38,650 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 05:25:40,200 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:25:40,200 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 05:25:41,639 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:25:41,640 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 05:25:44,250 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:25:44,250 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 05:25:45,721 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:25:45,722 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 05:25:45,976 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:25:45,976 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 05:25:47,298 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:25:47,298 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 05:25:47,561 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:25:47,561 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 05:25:47,831 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:25:47,831 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 05:25:48,085 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:25:48,085 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 05:25:50,594 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:25:50,595 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 05:25:51,940 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:25:51,941 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 05:25:56,245 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:25:56,246 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 05:25:59,998 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:25:59,998 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 05:26:00,258 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:26:00,259 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 05:26:04,044 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:26:04,044 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 05:26:08,068 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:26:08,068 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 05:26:10,211 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:26:10,211 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 05:26:11,661 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:26:11,661 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 05:26:11,924 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:26:11,924 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 05:26:13,667 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:26:13,668 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 05:26:13,920 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:26:13,920 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 05:26:14,616 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:26:14,616 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 05:26:14,891 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-03 05:26:14,891 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 67 treesize of output 48 [2021-11-03 05:26:15,319 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-03 05:26:15,319 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 05:26:15,421 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 05:26:15,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:28:44,860 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_#Ultimate.C_memset_#t~loopctr236| (_ BitVec 32)) (|v_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr236_324| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$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~loopctr236| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) (_ bv0 32)) (bvadd |v_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr236_324| |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 05:31:36,417 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_#Ultimate.C_memset_#t~loopctr236| (_ BitVec 32)) (|v_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr236_348| (_ BitVec 32))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$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~loopctr236| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) (_ bv0 32)) (bvadd |v_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr236_348| |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))))))))))))) is different from false