./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-3.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_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/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_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/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_97d84d58-f97c-425d-8be2-e65ff5bbddb9/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 93cc62483e7301c05d7788622f4f3fa5962cd13b8481778ecaf6adfc0416e51e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:26:07,062 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:26:07,065 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:26:07,119 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:26:07,120 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:26:07,124 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:26:07,126 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:26:07,130 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:26:07,132 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:26:07,140 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:26:07,141 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:26:07,143 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:26:07,144 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:26:07,146 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:26:07,149 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:26:07,154 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:26:07,156 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:26:07,157 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:26:07,159 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:26:07,167 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:26:07,169 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:26:07,170 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:26:07,173 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:26:07,174 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:26:07,183 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:26:07,184 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:26:07,184 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:26:07,186 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:26:07,187 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:26:07,188 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:26:07,188 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:26:07,189 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:26:07,191 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:26:07,192 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:26:07,194 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:26:07,194 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:26:07,195 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:26:07,195 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:26:07,195 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:26:07,196 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:26:07,197 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:26:07,198 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-03 04:26:07,240 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:26:07,240 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:26:07,242 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:26:07,248 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:26:07,248 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:26:07,248 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:26:07,249 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:26:07,249 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:26:07,249 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:26:07,249 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:26:07,250 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:26:07,251 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:26:07,251 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:26:07,251 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:26:07,251 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:26:07,252 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 04:26:07,252 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 04:26:07,253 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:26:07,253 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:26:07,253 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 04:26:07,253 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:26:07,254 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:26:07,254 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:26:07,254 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 04:26:07,254 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 04:26:07,254 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 04:26:07,255 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:26:07,255 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:26:07,255 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:26:07,255 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:26:07,256 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:26:07,256 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:26:07,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:26:07,257 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:26:07,257 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:26:07,257 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:26:07,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:26:07,257 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:26:07,258 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:26:07,258 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_97d84d58-f97c-425d-8be2-e65ff5bbddb9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93cc62483e7301c05d7788622f4f3fa5962cd13b8481778ecaf6adfc0416e51e [2021-11-03 04:26:07,564 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:26:07,592 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:26:07,595 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:26:07,597 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:26:07,598 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:26:07,599 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-3.i [2021-11-03 04:26:07,673 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/data/7b1bfcd92/5b3d183e595348e9b571940f9b6c6c69/FLAG84a60a514 [2021-11-03 04:26:08,327 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:26:08,328 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-3.i [2021-11-03 04:26:08,357 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/data/7b1bfcd92/5b3d183e595348e9b571940f9b6c6c69/FLAG84a60a514 [2021-11-03 04:26:08,503 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/data/7b1bfcd92/5b3d183e595348e9b571940f9b6c6c69 [2021-11-03 04:26:08,505 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:26:08,507 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:26:08,521 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:26:08,521 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:26:08,524 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:26:08,525 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:26:08" (1/1) ... [2021-11-03 04:26:08,527 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42f9c37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:08, skipping insertion in model container [2021-11-03 04:26:08,527 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:26:08" (1/1) ... [2021-11-03 04:26:08,532 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:26:08,606 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:26:09,090 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_97d84d58-f97c-425d-8be2-e65ff5bbddb9/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-3.i[33022,33035] [2021-11-03 04:26:09,356 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:26:09,365 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-03 04:26:09,366 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@76b0a512 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:09, skipping insertion in model container [2021-11-03 04:26:09,366 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:26:09,367 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 04:26:09,369 INFO L168 Benchmark]: Toolchain (without parser) took 861.03 ms. Allocated memory is still 117.4 MB. Free memory was 79.4 MB in the beginning and 73.0 MB in the end (delta: 6.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-03 04:26:09,370 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 86.0 MB. Free memory was 59.2 MB in the beginning and 59.1 MB in the end (delta: 26.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:26:09,371 INFO L168 Benchmark]: CACSL2BoogieTranslator took 846.19 ms. Allocated memory is still 117.4 MB. Free memory was 79.2 MB in the beginning and 73.0 MB in the end (delta: 6.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-03 04:26:09,373 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 86.0 MB. Free memory was 59.2 MB in the beginning and 59.1 MB in the end (delta: 26.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 846.19 ms. Allocated memory is still 117.4 MB. Free memory was 79.2 MB in the beginning and 73.0 MB in the end (delta: 6.2 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: 734]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/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_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/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_97d84d58-f97c-425d-8be2-e65ff5bbddb9/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 93cc62483e7301c05d7788622f4f3fa5962cd13b8481778ecaf6adfc0416e51e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:26:11,546 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:26:11,549 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:26:11,601 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:26:11,601 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:26:11,606 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:26:11,608 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:26:11,612 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:26:11,616 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:26:11,623 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:26:11,625 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:26:11,627 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:26:11,627 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:26:11,630 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:26:11,633 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:26:11,640 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:26:11,642 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:26:11,643 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:26:11,645 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:26:11,655 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:26:11,657 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:26:11,658 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:26:11,661 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:26:11,663 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:26:11,672 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:26:11,673 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:26:11,673 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:26:11,675 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:26:11,676 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:26:11,677 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:26:11,677 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:26:11,678 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:26:11,680 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:26:11,681 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:26:11,682 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:26:11,683 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:26:11,683 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:26:11,684 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:26:11,684 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:26:11,686 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:26:11,687 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:26:11,692 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-03 04:26:11,735 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:26:11,735 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:26:11,737 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:26:11,737 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:26:11,737 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:26:11,737 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:26:11,738 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:26:11,738 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:26:11,738 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:26:11,740 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 04:26:11,741 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 04:26:11,741 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:26:11,742 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:26:11,742 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 04:26:11,742 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:26:11,742 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:26:11,742 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:26:11,743 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 04:26:11,743 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 04:26:11,743 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 04:26:11,743 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:26:11,743 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:26:11,744 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 04:26:11,744 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 04:26:11,744 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:26:11,744 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:26:11,745 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:26:11,745 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 04:26:11,745 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:26:11,745 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:26:11,746 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:26:11,746 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:26:11,746 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 04:26:11,747 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 04:26:11,747 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:26:11,747 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:26:11,747 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_97d84d58-f97c-425d-8be2-e65ff5bbddb9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93cc62483e7301c05d7788622f4f3fa5962cd13b8481778ecaf6adfc0416e51e [2021-11-03 04:26:12,144 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:26:12,165 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:26:12,167 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:26:12,169 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:26:12,169 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:26:12,170 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-3.i [2021-11-03 04:26:12,252 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/data/2db2bfad2/9c28ded9fbdf400bbf57f28685a14181/FLAG9ed3cdd4d [2021-11-03 04:26:12,995 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:26:12,995 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-3.i [2021-11-03 04:26:13,015 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/data/2db2bfad2/9c28ded9fbdf400bbf57f28685a14181/FLAG9ed3cdd4d [2021-11-03 04:26:13,133 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/data/2db2bfad2/9c28ded9fbdf400bbf57f28685a14181 [2021-11-03 04:26:13,137 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:26:13,139 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:26:13,157 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:26:13,157 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:26:13,161 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:26:13,161 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:26:13" (1/1) ... [2021-11-03 04:26:13,163 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e0bca28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:13, skipping insertion in model container [2021-11-03 04:26:13,163 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:26:13" (1/1) ... [2021-11-03 04:26:13,172 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:26:13,263 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:26:13,818 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_97d84d58-f97c-425d-8be2-e65ff5bbddb9/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-3.i[33022,33035] [2021-11-03 04:26:14,198 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:26:14,212 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 04:26:14,228 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:26:14,261 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_97d84d58-f97c-425d-8be2-e65ff5bbddb9/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-3.i[33022,33035] [2021-11-03 04:26:14,379 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:26:14,384 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:26:14,410 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_97d84d58-f97c-425d-8be2-e65ff5bbddb9/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-3.i[33022,33035] [2021-11-03 04:26:14,531 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:26:14,611 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:26:14,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:14 WrapperNode [2021-11-03 04:26:14,612 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:26:14,613 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:26:14,613 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:26:14,614 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:26:14,620 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:14" (1/1) ... [2021-11-03 04:26:14,711 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:14" (1/1) ... [2021-11-03 04:26:14,824 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:26:14,825 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:26:14,825 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:26:14,826 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:26:14,834 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:14" (1/1) ... [2021-11-03 04:26:14,834 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:14" (1/1) ... [2021-11-03 04:26:14,849 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:14" (1/1) ... [2021-11-03 04:26:14,849 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:14" (1/1) ... [2021-11-03 04:26:14,963 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:14" (1/1) ... [2021-11-03 04:26:15,001 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:14" (1/1) ... [2021-11-03 04:26:15,012 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:14" (1/1) ... [2021-11-03 04:26:15,033 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:26:15,034 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:26:15,034 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:26:15,035 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:26:15,035 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:14" (1/1) ... [2021-11-03 04:26:15,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:26:15,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:26:15,084 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:26:15,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:26:15,133 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-03 04:26:15,133 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 04:26:15,133 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 04:26:15,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 04:26:15,134 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:26:15,134 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-03 04:26:15,134 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 04:26:15,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 04:26:15,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 04:26:15,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 04:26:15,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:26:15,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:26:25,854 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:26:25,855 INFO L299 CfgBuilder]: Removed 224 assume(true) statements. [2021-11-03 04:26:25,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:26:25 BoogieIcfgContainer [2021-11-03 04:26:25,860 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:26:25,862 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:26:25,862 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:26:25,864 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:26:25,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:26:13" (1/3) ... [2021-11-03 04:26:25,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f07d621 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:26:25, skipping insertion in model container [2021-11-03 04:26:25,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:14" (2/3) ... [2021-11-03 04:26:25,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f07d621 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:26:25, skipping insertion in model container [2021-11-03 04:26:25,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:26:25" (3/3) ... [2021-11-03 04:26:25,868 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_OAT_test10-3.i [2021-11-03 04:26:25,873 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:26:25,874 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1208 error locations. [2021-11-03 04:26:25,918 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:26:25,924 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 04:26:25,924 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1208 error locations. [2021-11-03 04:26:25,985 INFO L276 IsEmpty]: Start isEmpty. Operand has 2500 states, 1291 states have (on average 2.2130131680867544) internal successors, (2857), 2499 states have internal predecessors, (2857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:25,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-03 04:26:25,991 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:26:25,992 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-03 04:26:25,992 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 04:26:25,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:26:25,997 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-11-03 04:26:26,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:26:26,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2032891234] [2021-11-03 04:26:26,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:26:26,010 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:26:26,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:26:26,013 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:26:26,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 04:26:26,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:26:26,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:26:26,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:26:26,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:26:26,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:26:26,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:26:26,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:26:26,433 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:26:26,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2032891234] [2021-11-03 04:26:26,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2032891234] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:26:26,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:26:26,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:26:26,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177013280] [2021-11-03 04:26:26,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:26:26,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:26:26,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:26:26,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:26:26,477 INFO L87 Difference]: Start difference. First operand has 2500 states, 1291 states have (on average 2.2130131680867544) internal successors, (2857), 2499 states have internal predecessors, (2857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:31,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:26:31,649 INFO L93 Difference]: Finished difference Result 3353 states and 3561 transitions. [2021-11-03 04:26:31,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:26:31,651 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-03 04:26:31,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:26:31,696 INFO L225 Difference]: With dead ends: 3353 [2021-11-03 04:26:31,696 INFO L226 Difference]: Without dead ends: 3351 [2021-11-03 04:26:31,698 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:26:31,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3351 states. [2021-11-03 04:26:31,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3351 to 2648. [2021-11-03 04:26:31,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2648 states, 1463 states have (on average 2.0485304169514698) internal successors, (2997), 2647 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:31,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2648 states to 2648 states and 2997 transitions. [2021-11-03 04:26:31,861 INFO L78 Accepts]: Start accepts. Automaton has 2648 states and 2997 transitions. Word has length 3 [2021-11-03 04:26:31,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:26:31,862 INFO L470 AbstractCegarLoop]: Abstraction has 2648 states and 2997 transitions. [2021-11-03 04:26:31,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:31,863 INFO L276 IsEmpty]: Start isEmpty. Operand 2648 states and 2997 transitions. [2021-11-03 04:26:31,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-03 04:26:31,864 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:26:31,864 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-03 04:26:31,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 04:26:32,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:26:32,076 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 04:26:32,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:26:32,077 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-11-03 04:26:32,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:26:32,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1455670248] [2021-11-03 04:26:32,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:26:32,078 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:26:32,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:26:32,093 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:26:32,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 04:26:32,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:26:32,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:26:32,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:26:32,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:26:32,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:26:32,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:26:32,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:26:32,486 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:26:32,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1455670248] [2021-11-03 04:26:32,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1455670248] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:26:32,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:26:32,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 04:26:32,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839706595] [2021-11-03 04:26:32,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:26:32,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:26:32,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:26:32,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:26:32,498 INFO L87 Difference]: Start difference. First operand 2648 states and 2997 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:44,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:26:44,340 INFO L93 Difference]: Finished difference Result 4194 states and 4674 transitions. [2021-11-03 04:26:44,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:26:44,341 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-03 04:26:44,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:26:44,364 INFO L225 Difference]: With dead ends: 4194 [2021-11-03 04:26:44,364 INFO L226 Difference]: Without dead ends: 4194 [2021-11-03 04:26:44,365 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:26:44,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4194 states. [2021-11-03 04:26:44,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4194 to 2812. [2021-11-03 04:26:44,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2812 states, 1639 states have (on average 2.0372178157413057) internal successors, (3339), 2811 states have internal predecessors, (3339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:44,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2812 states to 2812 states and 3339 transitions. [2021-11-03 04:26:44,457 INFO L78 Accepts]: Start accepts. Automaton has 2812 states and 3339 transitions. Word has length 3 [2021-11-03 04:26:44,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:26:44,457 INFO L470 AbstractCegarLoop]: Abstraction has 2812 states and 3339 transitions. [2021-11-03 04:26:44,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:44,458 INFO L276 IsEmpty]: Start isEmpty. Operand 2812 states and 3339 transitions. [2021-11-03 04:26:44,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 04:26:44,458 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:26:44,458 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:26:44,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 04:26:44,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:26:44,671 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 04:26:44,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:26:44,672 INFO L85 PathProgramCache]: Analyzing trace with hash 62249618, now seen corresponding path program 1 times [2021-11-03 04:26:44,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:26:44,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2084903180] [2021-11-03 04:26:44,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:26:44,674 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:26:44,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:26:44,680 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:26:44,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 04:26:44,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:26:44,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:26:44,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:26:44,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:26:44,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:26:44,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:26:44,954 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 04:26:44,954 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:26:44,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2084903180] [2021-11-03 04:26:44,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2084903180] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:26:44,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:26:44,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:26:44,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867322413] [2021-11-03 04:26:44,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:26:44,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:26:44,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:26:44,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:26:44,957 INFO L87 Difference]: Start difference. First operand 2812 states and 3339 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:48,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:26:48,565 INFO L93 Difference]: Finished difference Result 3618 states and 4157 transitions. [2021-11-03 04:26:48,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:26:48,565 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-03 04:26:48,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:26:48,583 INFO L225 Difference]: With dead ends: 3618 [2021-11-03 04:26:48,583 INFO L226 Difference]: Without dead ends: 3618 [2021-11-03 04:26:48,584 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:26:48,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3618 states. [2021-11-03 04:26:48,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3618 to 2721. [2021-11-03 04:26:48,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2721 states, 1639 states have (on average 1.9609517998779744) internal successors, (3214), 2720 states have internal predecessors, (3214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:48,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2721 states to 2721 states and 3214 transitions. [2021-11-03 04:26:48,657 INFO L78 Accepts]: Start accepts. Automaton has 2721 states and 3214 transitions. Word has length 8 [2021-11-03 04:26:48,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:26:48,657 INFO L470 AbstractCegarLoop]: Abstraction has 2721 states and 3214 transitions. [2021-11-03 04:26:48,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:48,658 INFO L276 IsEmpty]: Start isEmpty. Operand 2721 states and 3214 transitions. [2021-11-03 04:26:48,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 04:26:48,658 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:26:48,659 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:26:48,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 04:26:48,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:26:48,874 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 04:26:48,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:26:48,876 INFO L85 PathProgramCache]: Analyzing trace with hash 62249619, now seen corresponding path program 1 times [2021-11-03 04:26:48,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:26:48,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [632515816] [2021-11-03 04:26:48,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:26:48,878 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:26:48,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:26:48,879 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:26:48,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 04:26:49,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:26:49,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:26:49,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:26:49,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:26:49,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:26:49,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:26:49,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:26:49,255 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:26:49,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [632515816] [2021-11-03 04:26:49,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [632515816] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:26:49,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:26:49,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 04:26:49,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835636742] [2021-11-03 04:26:49,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:26:49,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:26:49,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:26:49,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:26:49,258 INFO L87 Difference]: Start difference. First operand 2721 states and 3214 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:59,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:26:59,153 INFO L93 Difference]: Finished difference Result 3747 states and 4188 transitions. [2021-11-03 04:26:59,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:26:59,154 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-03 04:26:59,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:26:59,175 INFO L225 Difference]: With dead ends: 3747 [2021-11-03 04:26:59,175 INFO L226 Difference]: Without dead ends: 3747 [2021-11-03 04:26:59,175 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:26:59,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3747 states. [2021-11-03 04:26:59,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3747 to 2713. [2021-11-03 04:26:59,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2713 states, 1641 states have (on average 1.9463741620962827) internal successors, (3194), 2712 states have internal predecessors, (3194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:59,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 3194 transitions. [2021-11-03 04:26:59,237 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 3194 transitions. Word has length 8 [2021-11-03 04:26:59,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:26:59,238 INFO L470 AbstractCegarLoop]: Abstraction has 2713 states and 3194 transitions. [2021-11-03 04:26:59,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:59,238 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 3194 transitions. [2021-11-03 04:26:59,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-03 04:26:59,239 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:26:59,239 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:26:59,251 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-03 04:26:59,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:26:59,451 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr658REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 04:26:59,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:26:59,452 INFO L85 PathProgramCache]: Analyzing trace with hash 175289392, now seen corresponding path program 1 times [2021-11-03 04:26:59,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:26:59,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [12193834] [2021-11-03 04:26:59,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:26:59,453 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:26:59,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:26:59,459 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:26:59,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 04:26:59,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:26:59,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:26:59,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:26:59,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:26:59,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:26:59,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:26:59,754 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:26:59,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [12193834] [2021-11-03 04:26:59,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [12193834] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:26:59,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:26:59,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:26:59,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542283242] [2021-11-03 04:26:59,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:26:59,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:26:59,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:26:59,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:26:59,756 INFO L87 Difference]: Start difference. First operand 2713 states and 3194 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:59,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:26:59,808 INFO L93 Difference]: Finished difference Result 2671 states and 3151 transitions. [2021-11-03 04:26:59,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:26:59,808 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-03 04:26:59,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:26:59,824 INFO L225 Difference]: With dead ends: 2671 [2021-11-03 04:26:59,824 INFO L226 Difference]: Without dead ends: 2671 [2021-11-03 04:26:59,825 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:26:59,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2671 states. [2021-11-03 04:26:59,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2671 to 2671. [2021-11-03 04:26:59,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2671 states, 1623 states have (on average 1.9414664202094887) internal successors, (3151), 2670 states have internal predecessors, (3151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:59,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2671 states to 2671 states and 3151 transitions. [2021-11-03 04:26:59,879 INFO L78 Accepts]: Start accepts. Automaton has 2671 states and 3151 transitions. Word has length 11 [2021-11-03 04:26:59,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:26:59,880 INFO L470 AbstractCegarLoop]: Abstraction has 2671 states and 3151 transitions. [2021-11-03 04:26:59,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:59,880 INFO L276 IsEmpty]: Start isEmpty. Operand 2671 states and 3151 transitions. [2021-11-03 04:26:59,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-03 04:26:59,881 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:26:59,881 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:26:59,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 04:27:00,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:27:00,092 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr682REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 04:27:00,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:27:00,093 INFO L85 PathProgramCache]: Analyzing trace with hash 949435626, now seen corresponding path program 1 times [2021-11-03 04:27:00,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:27:00,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [5222188] [2021-11-03 04:27:00,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:27:00,093 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:27:00,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:27:00,094 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:27:00,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 04:27:00,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:27:00,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:27:00,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:00,323 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 04:27:00,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:00,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:00,356 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:27:00,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [5222188] [2021-11-03 04:27:00,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [5222188] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:27:00,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:27:00,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 04:27:00,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059598486] [2021-11-03 04:27:00,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:27:00,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:27:00,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:27:00,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:27:00,359 INFO L87 Difference]: Start difference. First operand 2671 states and 3151 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:00,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:27:00,462 INFO L93 Difference]: Finished difference Result 2650 states and 3123 transitions. [2021-11-03 04:27:00,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:27:00,462 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-03 04:27:00,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:27:00,475 INFO L225 Difference]: With dead ends: 2650 [2021-11-03 04:27:00,476 INFO L226 Difference]: Without dead ends: 2650 [2021-11-03 04:27:00,480 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:27:00,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2650 states. [2021-11-03 04:27:00,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2650 to 2649. [2021-11-03 04:27:00,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2649 states, 1615 states have (on average 1.9331269349845202) internal successors, (3122), 2648 states have internal predecessors, (3122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:00,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2649 states to 2649 states and 3122 transitions. [2021-11-03 04:27:00,532 INFO L78 Accepts]: Start accepts. Automaton has 2649 states and 3122 transitions. Word has length 13 [2021-11-03 04:27:00,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:27:00,533 INFO L470 AbstractCegarLoop]: Abstraction has 2649 states and 3122 transitions. [2021-11-03 04:27:00,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:00,533 INFO L276 IsEmpty]: Start isEmpty. Operand 2649 states and 3122 transitions. [2021-11-03 04:27:00,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-03 04:27:00,534 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:27:00,535 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:27:00,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 04:27:00,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:27:00,754 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr334REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 04:27:00,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:27:00,754 INFO L85 PathProgramCache]: Analyzing trace with hash 270217471, now seen corresponding path program 1 times [2021-11-03 04:27:00,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:27:00,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [705525204] [2021-11-03 04:27:00,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:27:00,755 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:27:00,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:27:00,756 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:27:00,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 04:27:00,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:27:00,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:27:00,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:01,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:01,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:01,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:01,064 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:27:01,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [705525204] [2021-11-03 04:27:01,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [705525204] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:27:01,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:27:01,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:27:01,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757911419] [2021-11-03 04:27:01,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:27:01,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:27:01,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:27:01,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:27:01,066 INFO L87 Difference]: Start difference. First operand 2649 states and 3122 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:01,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:27:01,129 INFO L93 Difference]: Finished difference Result 4337 states and 4926 transitions. [2021-11-03 04:27:01,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:27:01,130 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-03 04:27:01,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:27:01,151 INFO L225 Difference]: With dead ends: 4337 [2021-11-03 04:27:01,152 INFO L226 Difference]: Without dead ends: 4337 [2021-11-03 04:27:01,152 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:27:01,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4337 states. [2021-11-03 04:27:01,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4337 to 2571. [2021-11-03 04:27:01,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2571 states, 1561 states have (on average 1.9173606662395901) internal successors, (2993), 2570 states have internal predecessors, (2993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:01,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2571 states to 2571 states and 2993 transitions. [2021-11-03 04:27:01,227 INFO L78 Accepts]: Start accepts. Automaton has 2571 states and 2993 transitions. Word has length 20 [2021-11-03 04:27:01,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:27:01,228 INFO L470 AbstractCegarLoop]: Abstraction has 2571 states and 2993 transitions. [2021-11-03 04:27:01,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:01,230 INFO L276 IsEmpty]: Start isEmpty. Operand 2571 states and 2993 transitions. [2021-11-03 04:27:01,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-03 04:27:01,231 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:27:01,231 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:27:01,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 04:27:01,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:27:01,446 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 04:27:01,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:27:01,446 INFO L85 PathProgramCache]: Analyzing trace with hash -673839521, now seen corresponding path program 1 times [2021-11-03 04:27:01,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:27:01,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [666344130] [2021-11-03 04:27:01,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:27:01,447 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:27:01,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:27:01,448 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:27:01,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 04:27:01,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:27:01,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:27:01,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:01,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:01,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:01,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:01,733 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:27:01,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [666344130] [2021-11-03 04:27:01,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [666344130] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:27:01,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:27:01,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:27:01,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058563522] [2021-11-03 04:27:01,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:27:01,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:27:01,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:27:01,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:27:01,735 INFO L87 Difference]: Start difference. First operand 2571 states and 2993 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:01,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:27:01,792 INFO L93 Difference]: Finished difference Result 4260 states and 4849 transitions. [2021-11-03 04:27:01,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:27:01,792 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-03 04:27:01,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:27:01,808 INFO L225 Difference]: With dead ends: 4260 [2021-11-03 04:27:01,809 INFO L226 Difference]: Without dead ends: 4260 [2021-11-03 04:27:01,809 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:27:01,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4260 states. [2021-11-03 04:27:01,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4260 to 2529. [2021-11-03 04:27:01,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2529 states, 1543 states have (on average 1.911860012961763) internal successors, (2950), 2528 states have internal predecessors, (2950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:01,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2529 states to 2529 states and 2950 transitions. [2021-11-03 04:27:01,865 INFO L78 Accepts]: Start accepts. Automaton has 2529 states and 2950 transitions. Word has length 20 [2021-11-03 04:27:01,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:27:01,865 INFO L470 AbstractCegarLoop]: Abstraction has 2529 states and 2950 transitions. [2021-11-03 04:27:01,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:01,866 INFO L276 IsEmpty]: Start isEmpty. Operand 2529 states and 2950 transitions. [2021-11-03 04:27:01,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-03 04:27:01,867 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:27:01,867 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:27:01,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 04:27:02,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:27:02,079 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr358REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 04:27:02,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:27:02,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1980977049, now seen corresponding path program 1 times [2021-11-03 04:27:02,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:27:02,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1818031349] [2021-11-03 04:27:02,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:27:02,080 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:27:02,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:27:02,081 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:27:02,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 04:27:02,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:27:02,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:27:02,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:02,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:02,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:02,425 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 04:27:02,426 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:27:02,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1818031349] [2021-11-03 04:27:02,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1818031349] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:27:02,426 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:27:02,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 04:27:02,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71764726] [2021-11-03 04:27:02,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:27:02,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:27:02,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:27:02,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:27:02,427 INFO L87 Difference]: Start difference. First operand 2529 states and 2950 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:02,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:27:02,548 INFO L93 Difference]: Finished difference Result 4218 states and 4756 transitions. [2021-11-03 04:27:02,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:27:02,549 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-03 04:27:02,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:27:02,558 INFO L225 Difference]: With dead ends: 4218 [2021-11-03 04:27:02,558 INFO L226 Difference]: Without dead ends: 4218 [2021-11-03 04:27:02,559 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:27:02,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4218 states. [2021-11-03 04:27:02,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4218 to 2491. [2021-11-03 04:27:02,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2491 states, 1519 states have (on average 1.8847926267281105) internal successors, (2863), 2490 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:02,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2491 states to 2491 states and 2863 transitions. [2021-11-03 04:27:02,631 INFO L78 Accepts]: Start accepts. Automaton has 2491 states and 2863 transitions. Word has length 22 [2021-11-03 04:27:02,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:27:02,631 INFO L470 AbstractCegarLoop]: Abstraction has 2491 states and 2863 transitions. [2021-11-03 04:27:02,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:02,632 INFO L276 IsEmpty]: Start isEmpty. Operand 2491 states and 2863 transitions. [2021-11-03 04:27:02,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-03 04:27:02,633 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:27:02,633 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:27:02,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 04:27:02,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:27:02,844 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 04:27:02,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:27:02,845 INFO L85 PathProgramCache]: Analyzing trace with hash 980278297, now seen corresponding path program 1 times [2021-11-03 04:27:02,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:27:02,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [408939107] [2021-11-03 04:27:02,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:27:02,845 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:27:02,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:27:02,846 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:27:02,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 04:27:03,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:27:03,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:27:03,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:03,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:03,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:03,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:03,201 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:27:03,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [408939107] [2021-11-03 04:27:03,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [408939107] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:27:03,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:27:03,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 04:27:03,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248455303] [2021-11-03 04:27:03,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:27:03,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:27:03,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:27:03,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:27:03,203 INFO L87 Difference]: Start difference. First operand 2491 states and 2863 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:03,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:27:03,320 INFO L93 Difference]: Finished difference Result 4179 states and 4705 transitions. [2021-11-03 04:27:03,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:27:03,320 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-03 04:27:03,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:27:03,327 INFO L225 Difference]: With dead ends: 4179 [2021-11-03 04:27:03,327 INFO L226 Difference]: Without dead ends: 4179 [2021-11-03 04:27:03,327 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:27:03,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4179 states. [2021-11-03 04:27:03,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4179 to 2469. [2021-11-03 04:27:03,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2469 states, 1511 states have (on average 1.8755790866975512) internal successors, (2834), 2468 states have internal predecessors, (2834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:03,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2469 states to 2469 states and 2834 transitions. [2021-11-03 04:27:03,380 INFO L78 Accepts]: Start accepts. Automaton has 2469 states and 2834 transitions. Word has length 22 [2021-11-03 04:27:03,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:27:03,381 INFO L470 AbstractCegarLoop]: Abstraction has 2469 states and 2834 transitions. [2021-11-03 04:27:03,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:03,381 INFO L276 IsEmpty]: Start isEmpty. Operand 2469 states and 2834 transitions. [2021-11-03 04:27:03,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-03 04:27:03,382 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:27:03,383 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:27:03,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 04:27:03,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:27:03,594 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr696REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 04:27:03,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:27:03,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1893283832, now seen corresponding path program 1 times [2021-11-03 04:27:03,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:27:03,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1092710812] [2021-11-03 04:27:03,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:27:03,595 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:27:03,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:27:03,596 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:27:03,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 04:27:03,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:27:03,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:27:03,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:03,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:27:03,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:03,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:04,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:04,080 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:27:04,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1092710812] [2021-11-03 04:27:04,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1092710812] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:27:04,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:27:04,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:27:04,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326098008] [2021-11-03 04:27:04,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:27:04,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:27:04,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:27:04,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:27:04,084 INFO L87 Difference]: Start difference. First operand 2469 states and 2834 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:08,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:27:08,122 INFO L93 Difference]: Finished difference Result 3093 states and 3377 transitions. [2021-11-03 04:27:08,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:27:08,122 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-03 04:27:08,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:27:08,129 INFO L225 Difference]: With dead ends: 3093 [2021-11-03 04:27:08,129 INFO L226 Difference]: Without dead ends: 3093 [2021-11-03 04:27:08,130 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:27:08,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3093 states. [2021-11-03 04:27:08,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3093 to 2465. [2021-11-03 04:27:08,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2465 states, 1511 states have (on average 1.8729318332230311) internal successors, (2830), 2464 states have internal predecessors, (2830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:08,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2465 states to 2465 states and 2830 transitions. [2021-11-03 04:27:08,170 INFO L78 Accepts]: Start accepts. Automaton has 2465 states and 2830 transitions. Word has length 27 [2021-11-03 04:27:08,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:27:08,171 INFO L470 AbstractCegarLoop]: Abstraction has 2465 states and 2830 transitions. [2021-11-03 04:27:08,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:08,171 INFO L276 IsEmpty]: Start isEmpty. Operand 2465 states and 2830 transitions. [2021-11-03 04:27:08,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-03 04:27:08,177 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:27:08,177 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:27:08,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 04:27:08,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:27:08,389 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr697REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 04:27:08,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:27:08,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1893283833, now seen corresponding path program 1 times [2021-11-03 04:27:08,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:27:08,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1327051224] [2021-11-03 04:27:08,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:27:08,390 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:27:08,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:27:08,391 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:27:08,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 04:27:08,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:27:08,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:27:08,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:08,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:27:08,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:08,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:09,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:09,355 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:27:09,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1327051224] [2021-11-03 04:27:09,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1327051224] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:27:09,355 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:27:09,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 04:27:09,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853564183] [2021-11-03 04:27:09,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:27:09,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:27:09,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:27:09,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:27:09,357 INFO L87 Difference]: Start difference. First operand 2465 states and 2830 transitions. Second operand has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:21,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:27:21,704 INFO L93 Difference]: Finished difference Result 3708 states and 4079 transitions. [2021-11-03 04:27:21,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 04:27:21,706 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-03 04:27:21,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:27:21,713 INFO L225 Difference]: With dead ends: 3708 [2021-11-03 04:27:21,713 INFO L226 Difference]: Without dead ends: 3708 [2021-11-03 04:27:21,714 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:27:21,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3708 states. [2021-11-03 04:27:21,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3708 to 2498. [2021-11-03 04:27:21,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2498 states, 1545 states have (on average 1.855663430420712) internal successors, (2867), 2497 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:21,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2498 states to 2498 states and 2867 transitions. [2021-11-03 04:27:21,757 INFO L78 Accepts]: Start accepts. Automaton has 2498 states and 2867 transitions. Word has length 27 [2021-11-03 04:27:21,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:27:21,758 INFO L470 AbstractCegarLoop]: Abstraction has 2498 states and 2867 transitions. [2021-11-03 04:27:21,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:21,758 INFO L276 IsEmpty]: Start isEmpty. Operand 2498 states and 2867 transitions. [2021-11-03 04:27:21,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-03 04:27:21,759 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:27:21,760 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:27:21,788 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-03 04:27:21,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:27:21,971 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr372REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 04:27:21,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:27:21,972 INFO L85 PathProgramCache]: Analyzing trace with hash 187122631, now seen corresponding path program 1 times [2021-11-03 04:27:21,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:27:21,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2065765624] [2021-11-03 04:27:21,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:27:21,973 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:27:21,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:27:21,974 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:27:22,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 04:27:22,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:27:22,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:27:22,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:22,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:27:22,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:22,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:22,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:22,628 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:27:22,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2065765624] [2021-11-03 04:27:22,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2065765624] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:27:22,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:27:22,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:27:22,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222968814] [2021-11-03 04:27:22,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:27:22,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:27:22,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:27:22,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:27:22,630 INFO L87 Difference]: Start difference. First operand 2498 states and 2867 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:29,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:27:29,079 INFO L93 Difference]: Finished difference Result 5277 states and 5889 transitions. [2021-11-03 04:27:29,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:27:29,080 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-03 04:27:29,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:27:29,084 INFO L225 Difference]: With dead ends: 5277 [2021-11-03 04:27:29,085 INFO L226 Difference]: Without dead ends: 5277 [2021-11-03 04:27:29,085 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:27:29,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5277 states. [2021-11-03 04:27:29,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5277 to 2495. [2021-11-03 04:27:29,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2495 states, 1545 states have (on average 1.8485436893203884) internal successors, (2856), 2494 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:29,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2495 states to 2495 states and 2856 transitions. [2021-11-03 04:27:29,131 INFO L78 Accepts]: Start accepts. Automaton has 2495 states and 2856 transitions. Word has length 36 [2021-11-03 04:27:29,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:27:29,131 INFO L470 AbstractCegarLoop]: Abstraction has 2495 states and 2856 transitions. [2021-11-03 04:27:29,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:29,131 INFO L276 IsEmpty]: Start isEmpty. Operand 2495 states and 2856 transitions. [2021-11-03 04:27:29,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-03 04:27:29,132 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:27:29,132 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:27:29,144 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-03 04:27:29,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:27:29,344 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr373REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 04:27:29,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:27:29,345 INFO L85 PathProgramCache]: Analyzing trace with hash 187122632, now seen corresponding path program 1 times [2021-11-03 04:27:29,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:27:29,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [9174138] [2021-11-03 04:27:29,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:27:29,346 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:27:29,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:27:29,349 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:27:29,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 04:27:29,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:27:29,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:27:29,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:29,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:27:29,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:29,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:30,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:30,410 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:27:30,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [9174138] [2021-11-03 04:27:30,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [9174138] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:27:30,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:27:30,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 04:27:30,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641947591] [2021-11-03 04:27:30,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:27:30,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:27:30,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:27:30,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:27:30,412 INFO L87 Difference]: Start difference. First operand 2495 states and 2856 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:50,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:27:50,008 INFO L93 Difference]: Finished difference Result 5397 states and 5957 transitions. [2021-11-03 04:27:50,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 04:27:50,009 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-03 04:27:50,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:27:50,013 INFO L225 Difference]: With dead ends: 5397 [2021-11-03 04:27:50,013 INFO L226 Difference]: Without dead ends: 5397 [2021-11-03 04:27:50,013 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:27:50,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5397 states. [2021-11-03 04:27:50,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5397 to 2495. [2021-11-03 04:27:50,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2495 states, 1545 states have (on average 1.8459546925566344) internal successors, (2852), 2494 states have internal predecessors, (2852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:50,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2495 states to 2495 states and 2852 transitions. [2021-11-03 04:27:50,050 INFO L78 Accepts]: Start accepts. Automaton has 2495 states and 2852 transitions. Word has length 36 [2021-11-03 04:27:50,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:27:50,050 INFO L470 AbstractCegarLoop]: Abstraction has 2495 states and 2852 transitions. [2021-11-03 04:27:50,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:50,051 INFO L276 IsEmpty]: Start isEmpty. Operand 2495 states and 2852 transitions. [2021-11-03 04:27:50,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-03 04:27:50,051 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:27:50,051 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:27:50,076 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-03 04:27:50,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:27:50,263 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr54REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 04:27:50,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:27:50,264 INFO L85 PathProgramCache]: Analyzing trace with hash -773066201, now seen corresponding path program 1 times [2021-11-03 04:27:50,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:27:50,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [740521527] [2021-11-03 04:27:50,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:27:50,265 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:27:50,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:27:50,265 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:27:50,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 04:27:50,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:27:50,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:27:50,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:50,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:27:50,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:50,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:50,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:50,820 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:27:50,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [740521527] [2021-11-03 04:27:50,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [740521527] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:27:50,820 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:27:50,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:27:50,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174015749] [2021-11-03 04:27:50,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:27:50,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:27:50,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:27:50,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:27:50,822 INFO L87 Difference]: Start difference. First operand 2495 states and 2852 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:56,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:27:56,408 INFO L93 Difference]: Finished difference Result 4881 states and 5469 transitions. [2021-11-03 04:27:56,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:27:56,408 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-03 04:27:56,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:27:56,412 INFO L225 Difference]: With dead ends: 4881 [2021-11-03 04:27:56,412 INFO L226 Difference]: Without dead ends: 4881 [2021-11-03 04:27:56,412 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:27:56,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4881 states. [2021-11-03 04:27:56,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4881 to 2491. [2021-11-03 04:27:56,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2491 states, 1545 states have (on average 1.8433656957928803) internal successors, (2848), 2490 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:56,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2491 states to 2491 states and 2848 transitions. [2021-11-03 04:27:56,444 INFO L78 Accepts]: Start accepts. Automaton has 2491 states and 2848 transitions. Word has length 36 [2021-11-03 04:27:56,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:27:56,444 INFO L470 AbstractCegarLoop]: Abstraction has 2491 states and 2848 transitions. [2021-11-03 04:27:56,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:56,445 INFO L276 IsEmpty]: Start isEmpty. Operand 2491 states and 2848 transitions. [2021-11-03 04:27:56,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-03 04:27:56,445 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:27:56,446 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:27:56,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 04:27:56,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:27:56,658 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr55REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 04:27:56,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:27:56,658 INFO L85 PathProgramCache]: Analyzing trace with hash -773066200, now seen corresponding path program 1 times [2021-11-03 04:27:56,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:27:56,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [426563197] [2021-11-03 04:27:56,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:27:56,659 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:27:56,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:27:56,661 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:27:56,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 04:27:56,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:27:56,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:27:57,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:57,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:27:57,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:57,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:57,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:57,683 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:27:57,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [426563197] [2021-11-03 04:27:57,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [426563197] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:27:57,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:27:57,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 04:27:57,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564070973] [2021-11-03 04:27:57,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:27:57,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:27:57,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:27:57,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:27:57,685 INFO L87 Difference]: Start difference. First operand 2491 states and 2848 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:10,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:28:10,873 INFO L93 Difference]: Finished difference Result 4786 states and 5254 transitions. [2021-11-03 04:28:10,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:28:10,874 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-03 04:28:10,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:28:10,878 INFO L225 Difference]: With dead ends: 4786 [2021-11-03 04:28:10,878 INFO L226 Difference]: Without dead ends: 4786 [2021-11-03 04:28:10,878 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:28:10,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4786 states. [2021-11-03 04:28:10,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4786 to 2487. [2021-11-03 04:28:10,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 1545 states have (on average 1.840776699029126) internal successors, (2844), 2486 states have internal predecessors, (2844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:10,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 2844 transitions. [2021-11-03 04:28:10,911 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 2844 transitions. Word has length 36 [2021-11-03 04:28:10,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:28:10,911 INFO L470 AbstractCegarLoop]: Abstraction has 2487 states and 2844 transitions. [2021-11-03 04:28:10,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:10,912 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 2844 transitions. [2021-11-03 04:28:10,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-03 04:28:10,912 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:28:10,912 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:28:10,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-03 04:28:11,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:28:11,125 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 04:28:11,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:28:11,125 INFO L85 PathProgramCache]: Analyzing trace with hash -480226171, now seen corresponding path program 1 times [2021-11-03 04:28:11,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:28:11,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [520207482] [2021-11-03 04:28:11,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:28:11,126 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:28:11,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:28:11,127 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:28:11,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 04:28:11,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:28:11,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:28:11,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:28:11,598 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 04:28:11,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:28:11,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:11,692 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:28:11,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [520207482] [2021-11-03 04:28:11,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [520207482] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:28:11,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:28:11,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:28:11,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172327728] [2021-11-03 04:28:11,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:28:11,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:28:11,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:28:11,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:28:11,694 INFO L87 Difference]: Start difference. First operand 2487 states and 2844 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:11,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:28:11,744 INFO L93 Difference]: Finished difference Result 2481 states and 2830 transitions. [2021-11-03 04:28:11,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:28:11,745 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-03 04:28:11,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:28:11,748 INFO L225 Difference]: With dead ends: 2481 [2021-11-03 04:28:11,748 INFO L226 Difference]: Without dead ends: 2481 [2021-11-03 04:28:11,748 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:28:11,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2481 states. [2021-11-03 04:28:11,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2481 to 2481. [2021-11-03 04:28:11,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2481 states, 1539 states have (on average 1.838856400259909) internal successors, (2830), 2480 states have internal predecessors, (2830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:11,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2481 states to 2481 states and 2830 transitions. [2021-11-03 04:28:11,771 INFO L78 Accepts]: Start accepts. Automaton has 2481 states and 2830 transitions. Word has length 40 [2021-11-03 04:28:11,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:28:11,771 INFO L470 AbstractCegarLoop]: Abstraction has 2481 states and 2830 transitions. [2021-11-03 04:28:11,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:11,772 INFO L276 IsEmpty]: Start isEmpty. Operand 2481 states and 2830 transitions. [2021-11-03 04:28:11,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-03 04:28:11,773 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:28:11,773 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:28:11,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-03 04:28:11,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:28:11,985 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 04:28:11,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:28:11,986 INFO L85 PathProgramCache]: Analyzing trace with hash -952585927, now seen corresponding path program 1 times [2021-11-03 04:28:11,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:28:11,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1249513104] [2021-11-03 04:28:11,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:28:11,986 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:28:11,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:28:11,987 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:28:11,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 04:28:12,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:28:12,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:28:12,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:28:12,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:12,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:28:13,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:13,005 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:28:13,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1249513104] [2021-11-03 04:28:13,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1249513104] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:28:13,006 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:28:13,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:28:13,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895021088] [2021-11-03 04:28:13,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:28:13,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:28:13,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:28:13,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:28:13,007 INFO L87 Difference]: Start difference. First operand 2481 states and 2830 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:13,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:28:13,273 INFO L93 Difference]: Finished difference Result 4076 states and 4571 transitions. [2021-11-03 04:28:13,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:28:13,273 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-03 04:28:13,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:28:13,278 INFO L225 Difference]: With dead ends: 4076 [2021-11-03 04:28:13,278 INFO L226 Difference]: Without dead ends: 4076 [2021-11-03 04:28:13,278 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:28:13,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-11-03 04:28:13,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 3245. [2021-11-03 04:28:13,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3245 states, 2303 states have (on average 1.8085106382978724) internal successors, (4165), 3244 states have internal predecessors, (4165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:13,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3245 states to 3245 states and 4165 transitions. [2021-11-03 04:28:13,318 INFO L78 Accepts]: Start accepts. Automaton has 3245 states and 4165 transitions. Word has length 48 [2021-11-03 04:28:13,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:28:13,319 INFO L470 AbstractCegarLoop]: Abstraction has 3245 states and 4165 transitions. [2021-11-03 04:28:13,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:13,319 INFO L276 IsEmpty]: Start isEmpty. Operand 3245 states and 4165 transitions. [2021-11-03 04:28:13,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-03 04:28:13,320 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:28:13,320 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:28:13,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-03 04:28:13,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:28:13,533 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 04:28:13,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:28:13,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1775606781, now seen corresponding path program 1 times [2021-11-03 04:28:13,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:28:13,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1498571015] [2021-11-03 04:28:13,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:28:13,535 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:28:13,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:28:13,536 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:28:13,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-03 04:28:14,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:28:14,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:28:14,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:28:14,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:14,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:28:14,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:14,234 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:28:14,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1498571015] [2021-11-03 04:28:14,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1498571015] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:28:14,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:28:14,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:28:14,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729914799] [2021-11-03 04:28:14,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:28:14,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:28:14,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:28:14,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:28:14,236 INFO L87 Difference]: Start difference. First operand 3245 states and 4165 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:14,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:28:14,295 INFO L93 Difference]: Finished difference Result 4650 states and 5656 transitions. [2021-11-03 04:28:14,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:28:14,295 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-03 04:28:14,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:28:14,299 INFO L225 Difference]: With dead ends: 4650 [2021-11-03 04:28:14,299 INFO L226 Difference]: Without dead ends: 4650 [2021-11-03 04:28:14,300 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:28:14,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4650 states. [2021-11-03 04:28:14,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4650 to 3221. [2021-11-03 04:28:14,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3221 states, 2279 states have (on average 1.8100043878894252) internal successors, (4125), 3220 states have internal predecessors, (4125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:14,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3221 states to 3221 states and 4125 transitions. [2021-11-03 04:28:14,345 INFO L78 Accepts]: Start accepts. Automaton has 3221 states and 4125 transitions. Word has length 51 [2021-11-03 04:28:14,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:28:14,346 INFO L470 AbstractCegarLoop]: Abstraction has 3221 states and 4125 transitions. [2021-11-03 04:28:14,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:14,346 INFO L276 IsEmpty]: Start isEmpty. Operand 3221 states and 4125 transitions. [2021-11-03 04:28:14,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-03 04:28:14,347 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:28:14,347 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:28:14,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-03 04:28:14,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:28:14,561 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 04:28:14,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:28:14,561 INFO L85 PathProgramCache]: Analyzing trace with hash 732181606, now seen corresponding path program 1 times [2021-11-03 04:28:14,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:28:14,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [748317111] [2021-11-03 04:28:14,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:28:14,562 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:28:14,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:28:14,563 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:28:14,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-03 04:28:15,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:28:15,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:28:15,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:28:15,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:15,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:28:15,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:15,406 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:28:15,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [748317111] [2021-11-03 04:28:15,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [748317111] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:28:15,406 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:28:15,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:28:15,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752172565] [2021-11-03 04:28:15,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:28:15,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:28:15,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:28:15,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:28:15,407 INFO L87 Difference]: Start difference. First operand 3221 states and 4125 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:15,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:28:15,480 INFO L93 Difference]: Finished difference Result 4386 states and 5145 transitions. [2021-11-03 04:28:15,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:28:15,481 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-03 04:28:15,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:28:15,485 INFO L225 Difference]: With dead ends: 4386 [2021-11-03 04:28:15,485 INFO L226 Difference]: Without dead ends: 4386 [2021-11-03 04:28:15,485 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:28:15,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4386 states. [2021-11-03 04:28:15,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4386 to 3209. [2021-11-03 04:28:15,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3209 states, 2267 states have (on average 1.8107631230701366) internal successors, (4105), 3208 states have internal predecessors, (4105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:15,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3209 states to 3209 states and 4105 transitions. [2021-11-03 04:28:15,516 INFO L78 Accepts]: Start accepts. Automaton has 3209 states and 4105 transitions. Word has length 54 [2021-11-03 04:28:15,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:28:15,517 INFO L470 AbstractCegarLoop]: Abstraction has 3209 states and 4105 transitions. [2021-11-03 04:28:15,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:15,517 INFO L276 IsEmpty]: Start isEmpty. Operand 3209 states and 4105 transitions. [2021-11-03 04:28:15,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-03 04:28:15,518 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:28:15,518 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:28:15,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-03 04:28:15,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:28:15,733 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr740ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 04:28:15,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:28:15,733 INFO L85 PathProgramCache]: Analyzing trace with hash -993308447, now seen corresponding path program 1 times [2021-11-03 04:28:15,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:28:15,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [555877449] [2021-11-03 04:28:15,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:28:15,734 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:28:15,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:28:15,735 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:28:15,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-03 04:28:16,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:28:16,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:28:16,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:28:16,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:28:16,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:28:16,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:28:16,404 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-03 04:28:16,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-03 04:28:16,470 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-03 04:28:16,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-11-03 04:28:16,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:16,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:28:16,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:16,743 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:28:16,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [555877449] [2021-11-03 04:28:16,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [555877449] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:28:16,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:28:16,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:28:16,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320606944] [2021-11-03 04:28:16,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:28:16,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:28:16,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:28:16,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:28:16,745 INFO L87 Difference]: Start difference. First operand 3209 states and 4105 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:19,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:28:19,916 INFO L93 Difference]: Finished difference Result 3437 states and 4344 transitions. [2021-11-03 04:28:19,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:28:19,917 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-03 04:28:19,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:28:19,920 INFO L225 Difference]: With dead ends: 3437 [2021-11-03 04:28:19,920 INFO L226 Difference]: Without dead ends: 3437 [2021-11-03 04:28:19,920 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:28:19,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3437 states. [2021-11-03 04:28:19,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3437 to 3175. [2021-11-03 04:28:19,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3175 states, 2233 states have (on average 1.8226600985221675) internal successors, (4070), 3174 states have internal predecessors, (4070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:19,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3175 states to 3175 states and 4070 transitions. [2021-11-03 04:28:19,948 INFO L78 Accepts]: Start accepts. Automaton has 3175 states and 4070 transitions. Word has length 54 [2021-11-03 04:28:19,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:28:19,949 INFO L470 AbstractCegarLoop]: Abstraction has 3175 states and 4070 transitions. [2021-11-03 04:28:19,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:19,949 INFO L276 IsEmpty]: Start isEmpty. Operand 3175 states and 4070 transitions. [2021-11-03 04:28:19,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-03 04:28:19,950 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:28:19,950 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:28:19,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-03 04:28:20,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:28:20,165 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 04:28:20,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:28:20,166 INFO L85 PathProgramCache]: Analyzing trace with hash -637866953, now seen corresponding path program 1 times [2021-11-03 04:28:20,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:28:20,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [579722247] [2021-11-03 04:28:20,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:28:20,166 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:28:20,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:28:20,167 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:28:20,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-03 04:28:20,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:28:20,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:28:20,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:28:21,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:21,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:28:21,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:21,522 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:28:21,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [579722247] [2021-11-03 04:28:21,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [579722247] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:28:21,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:28:21,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:28:21,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419134490] [2021-11-03 04:28:21,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:28:21,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:28:21,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:28:21,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:28:21,525 INFO L87 Difference]: Start difference. First operand 3175 states and 4070 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:21,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:28:21,672 INFO L93 Difference]: Finished difference Result 4704 states and 5822 transitions. [2021-11-03 04:28:21,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:28:21,673 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-03 04:28:21,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:28:21,677 INFO L225 Difference]: With dead ends: 4704 [2021-11-03 04:28:21,677 INFO L226 Difference]: Without dead ends: 4704 [2021-11-03 04:28:21,677 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:28:21,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4704 states. [2021-11-03 04:28:21,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4704 to 3943. [2021-11-03 04:28:21,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3943 states, 3001 states have (on average 1.7887370876374542) internal successors, (5368), 3942 states have internal predecessors, (5368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:21,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3943 states to 3943 states and 5368 transitions. [2021-11-03 04:28:21,712 INFO L78 Accepts]: Start accepts. Automaton has 3943 states and 5368 transitions. Word has length 59 [2021-11-03 04:28:21,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:28:21,713 INFO L470 AbstractCegarLoop]: Abstraction has 3943 states and 5368 transitions. [2021-11-03 04:28:21,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:21,713 INFO L276 IsEmpty]: Start isEmpty. Operand 3943 states and 5368 transitions. [2021-11-03 04:28:21,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-03 04:28:21,714 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:28:21,714 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:28:21,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-03 04:28:21,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:28:21,928 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr391REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 04:28:21,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:28:21,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1882812110, now seen corresponding path program 1 times [2021-11-03 04:28:21,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:28:21,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [40960597] [2021-11-03 04:28:21,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:28:21,929 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:28:21,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:28:21,934 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:28:21,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-03 04:28:22,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:28:22,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:28:22,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:28:22,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:28:22,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:28:23,403 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-03 04:28:23,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2021-11-03 04:28:23,408 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-03 04:28:23,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 21 [2021-11-03 04:28:23,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:23,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:28:28,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:28,484 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:28:28,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [40960597] [2021-11-03 04:28:28,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [40960597] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:28:28,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:28:28,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 04:28:28,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004299755] [2021-11-03 04:28:28,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:28:28,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:28:28,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:28:28,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-03 04:28:28,486 INFO L87 Difference]: Start difference. First operand 3943 states and 5368 transitions. Second operand has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:58,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:28:58,697 INFO L93 Difference]: Finished difference Result 7168 states and 9781 transitions. [2021-11-03 04:28:58,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:28:58,698 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-03 04:28:58,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:28:58,706 INFO L225 Difference]: With dead ends: 7168 [2021-11-03 04:28:58,706 INFO L226 Difference]: Without dead ends: 7168 [2021-11-03 04:28:58,707 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 119 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 04:28:58,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7168 states. [2021-11-03 04:28:58,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7168 to 3887. [2021-11-03 04:28:58,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3887 states, 3009 states have (on average 1.7374543037554004) internal successors, (5228), 3886 states have internal predecessors, (5228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:58,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3887 states to 3887 states and 5228 transitions. [2021-11-03 04:28:58,760 INFO L78 Accepts]: Start accepts. Automaton has 3887 states and 5228 transitions. Word has length 62 [2021-11-03 04:28:58,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:28:58,760 INFO L470 AbstractCegarLoop]: Abstraction has 3887 states and 5228 transitions. [2021-11-03 04:28:58,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:28:58,760 INFO L276 IsEmpty]: Start isEmpty. Operand 3887 states and 5228 transitions. [2021-11-03 04:28:58,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-03 04:28:58,761 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:28:58,761 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:28:58,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-11-03 04:28:58,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:28:58,982 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr396ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 04:28:58,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:28:58,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1203198829, now seen corresponding path program 1 times [2021-11-03 04:28:58,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:28:58,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [787588859] [2021-11-03 04:28:58,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:28:58,983 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:28:58,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:28:58,984 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:28:58,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-03 04:28:59,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:28:59,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:28:59,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:28:59,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:28:59,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-03 04:28:59,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-03 04:28:59,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:59,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:29:00,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:00,002 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:29:00,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [787588859] [2021-11-03 04:29:00,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [787588859] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:29:00,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:29:00,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 04:29:00,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569194520] [2021-11-03 04:29:00,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:29:00,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:29:00,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:29:00,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:29:00,004 INFO L87 Difference]: Start difference. First operand 3887 states and 5228 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:10,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:29:10,180 INFO L93 Difference]: Finished difference Result 6424 states and 8590 transitions. [2021-11-03 04:29:10,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-03 04:29:10,181 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-03 04:29:10,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:29:10,186 INFO L225 Difference]: With dead ends: 6424 [2021-11-03 04:29:10,186 INFO L226 Difference]: Without dead ends: 6424 [2021-11-03 04:29:10,186 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-03 04:29:10,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6424 states. [2021-11-03 04:29:10,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6424 to 3886. [2021-11-03 04:29:10,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3886 states, 3009 states have (on average 1.7364572947823198) internal successors, (5225), 3885 states have internal predecessors, (5225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:10,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3886 states to 3886 states and 5225 transitions. [2021-11-03 04:29:10,233 INFO L78 Accepts]: Start accepts. Automaton has 3886 states and 5225 transitions. Word has length 68 [2021-11-03 04:29:10,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:29:10,233 INFO L470 AbstractCegarLoop]: Abstraction has 3886 states and 5225 transitions. [2021-11-03 04:29:10,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:10,234 INFO L276 IsEmpty]: Start isEmpty. Operand 3886 states and 5225 transitions. [2021-11-03 04:29:10,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-03 04:29:10,237 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:29:10,237 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:29:10,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-03 04:29:10,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:29:10,455 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr78ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 04:29:10,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:29:10,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1028979469, now seen corresponding path program 1 times [2021-11-03 04:29:10,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:29:10,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1996826987] [2021-11-03 04:29:10,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:29:10,456 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:29:10,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:29:10,457 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:29:10,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-03 04:29:11,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:29:11,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:29:11,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:29:11,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:29:11,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-03 04:29:11,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-03 04:29:11,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:11,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:29:11,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:11,557 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:29:11,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1996826987] [2021-11-03 04:29:11,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1996826987] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:29:11,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:29:11,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 04:29:11,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044492419] [2021-11-03 04:29:11,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:29:11,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:29:11,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:29:11,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:29:11,559 INFO L87 Difference]: Start difference. First operand 3886 states and 5225 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:22,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:29:22,056 INFO L93 Difference]: Finished difference Result 6416 states and 8576 transitions. [2021-11-03 04:29:22,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-03 04:29:22,056 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-03 04:29:22,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:29:22,061 INFO L225 Difference]: With dead ends: 6416 [2021-11-03 04:29:22,061 INFO L226 Difference]: Without dead ends: 6416 [2021-11-03 04:29:22,061 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-03 04:29:22,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6416 states. [2021-11-03 04:29:22,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6416 to 3885. [2021-11-03 04:29:22,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3885 states, 3009 states have (on average 1.7357926221335993) internal successors, (5223), 3884 states have internal predecessors, (5223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:22,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3885 states to 3885 states and 5223 transitions. [2021-11-03 04:29:22,098 INFO L78 Accepts]: Start accepts. Automaton has 3885 states and 5223 transitions. Word has length 68 [2021-11-03 04:29:22,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:29:22,098 INFO L470 AbstractCegarLoop]: Abstraction has 3885 states and 5223 transitions. [2021-11-03 04:29:22,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:22,098 INFO L276 IsEmpty]: Start isEmpty. Operand 3885 states and 5223 transitions. [2021-11-03 04:29:22,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-03 04:29:22,099 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:29:22,099 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:29:22,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-03 04:29:22,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:29:22,299 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr397ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 04:29:22,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:29:22,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1355543210, now seen corresponding path program 1 times [2021-11-03 04:29:22,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:29:22,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [916119023] [2021-11-03 04:29:22,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:29:22,300 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:29:22,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:29:22,301 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:29:22,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-03 04:29:23,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:29:23,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 04:29:23,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:29:23,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:29:23,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-03 04:29:23,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-03 04:29:23,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-03 04:29:23,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-03 04:29:23,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:23,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:29:23,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:23,769 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:29:23,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [916119023] [2021-11-03 04:29:23,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [916119023] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:29:23,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:29:23,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-03 04:29:23,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556896766] [2021-11-03 04:29:23,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 04:29:23,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:29:23,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 04:29:23,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:29:23,770 INFO L87 Difference]: Start difference. First operand 3885 states and 5223 transitions. Second operand has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:58,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:29:58,365 INFO L93 Difference]: Finished difference Result 5915 states and 7866 transitions. [2021-11-03 04:29:58,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-03 04:29:58,366 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-03 04:29:58,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:29:58,370 INFO L225 Difference]: With dead ends: 5915 [2021-11-03 04:29:58,370 INFO L226 Difference]: Without dead ends: 5915 [2021-11-03 04:29:58,371 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-11-03 04:29:58,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5915 states. [2021-11-03 04:29:58,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5915 to 3884. [2021-11-03 04:29:58,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3884 states, 3009 states have (on average 1.7347956131605184) internal successors, (5220), 3883 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:58,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3884 states to 3884 states and 5220 transitions. [2021-11-03 04:29:58,404 INFO L78 Accepts]: Start accepts. Automaton has 3884 states and 5220 transitions. Word has length 69 [2021-11-03 04:29:58,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:29:58,404 INFO L470 AbstractCegarLoop]: Abstraction has 3884 states and 5220 transitions. [2021-11-03 04:29:58,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:58,404 INFO L276 IsEmpty]: Start isEmpty. Operand 3884 states and 5220 transitions. [2021-11-03 04:29:58,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-03 04:29:58,405 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:29:58,405 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:29:58,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-03 04:29:58,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:29:58,606 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr79ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 04:29:58,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:29:58,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1833592125, now seen corresponding path program 1 times [2021-11-03 04:29:58,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:29:58,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1125383408] [2021-11-03 04:29:58,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:29:58,607 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:29:58,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:29:58,607 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:29:58,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-03 04:29:59,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:29:59,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 04:29:59,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:29:59,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:29:59,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-03 04:29:59,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-03 04:29:59,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-03 04:29:59,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-03 04:29:59,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:59,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:30:00,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:30:00,136 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:30:00,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1125383408] [2021-11-03 04:30:00,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1125383408] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:30:00,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:30:00,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-03 04:30:00,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586312966] [2021-11-03 04:30:00,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 04:30:00,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:30:00,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 04:30:00,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:30:00,138 INFO L87 Difference]: Start difference. First operand 3884 states and 5220 transitions. Second operand has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:30:36,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:30:36,225 INFO L93 Difference]: Finished difference Result 5910 states and 7857 transitions. [2021-11-03 04:30:36,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-03 04:30:36,227 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-03 04:30:36,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:30:36,231 INFO L225 Difference]: With dead ends: 5910 [2021-11-03 04:30:36,231 INFO L226 Difference]: Without dead ends: 5910 [2021-11-03 04:30:36,231 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-11-03 04:30:36,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5910 states. [2021-11-03 04:30:36,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5910 to 3883. [2021-11-03 04:30:36,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3883 states, 3009 states have (on average 1.734130940511798) internal successors, (5218), 3882 states have internal predecessors, (5218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:30:36,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3883 states to 3883 states and 5218 transitions. [2021-11-03 04:30:36,269 INFO L78 Accepts]: Start accepts. Automaton has 3883 states and 5218 transitions. Word has length 69 [2021-11-03 04:30:36,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:30:36,270 INFO L470 AbstractCegarLoop]: Abstraction has 3883 states and 5218 transitions. [2021-11-03 04:30:36,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:30:36,270 INFO L276 IsEmpty]: Start isEmpty. Operand 3883 states and 5218 transitions. [2021-11-03 04:30:36,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-03 04:30:36,271 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:30:36,271 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:30:36,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-03 04:30:36,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:30:36,486 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr400REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 04:30:36,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:30:36,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1361720913, now seen corresponding path program 1 times [2021-11-03 04:30:36,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:30:36,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1259774852] [2021-11-03 04:30:36,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:30:36,487 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:30:36,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:30:36,488 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:30:36,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-03 04:30:37,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:30:37,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:30:37,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:30:37,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:30:37,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:30:37,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:30:37,652 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:30:37,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1259774852] [2021-11-03 04:30:37,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1259774852] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:30:37,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:30:37,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:30:37,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976302470] [2021-11-03 04:30:37,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:30:37,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:30:37,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:30:37,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:30:37,654 INFO L87 Difference]: Start difference. First operand 3883 states and 5218 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:30:37,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:30:37,909 INFO L93 Difference]: Finished difference Result 6438 states and 8589 transitions. [2021-11-03 04:30:37,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:30:37,910 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-03 04:30:37,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:30:37,915 INFO L225 Difference]: With dead ends: 6438 [2021-11-03 04:30:37,915 INFO L226 Difference]: Without dead ends: 6438 [2021-11-03 04:30:37,915 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:30:37,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6438 states. [2021-11-03 04:30:37,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6438 to 3898. [2021-11-03 04:30:37,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3898 states, 3024 states have (on average 1.730489417989418) internal successors, (5233), 3897 states have internal predecessors, (5233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:30:37,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3898 states to 3898 states and 5233 transitions. [2021-11-03 04:30:37,953 INFO L78 Accepts]: Start accepts. Automaton has 3898 states and 5233 transitions. Word has length 73 [2021-11-03 04:30:37,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:30:37,953 INFO L470 AbstractCegarLoop]: Abstraction has 3898 states and 5233 transitions. [2021-11-03 04:30:37,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:30:37,953 INFO L276 IsEmpty]: Start isEmpty. Operand 3898 states and 5233 transitions. [2021-11-03 04:30:37,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-03 04:30:37,954 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:30:37,954 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:30:37,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-03 04:30:38,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:30:38,154 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr400REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 04:30:38,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:30:38,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1412235279, now seen corresponding path program 1 times [2021-11-03 04:30:38,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:30:38,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [985186288] [2021-11-03 04:30:38,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:30:38,155 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:30:38,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:30:38,156 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:30:38,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-03 04:30:39,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:30:39,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:30:39,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:30:39,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:30:39,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:30:39,391 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:30:39,391 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:30:39,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [985186288] [2021-11-03 04:30:39,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [985186288] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:30:39,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1078664894] [2021-11-03 04:30:39,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:30:39,392 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:30:39,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:30:39,394 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:30:39,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-03 04:30:40,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:30:40,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:30:40,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:30:40,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:30:40,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:30:40,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:30:40,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1078664894] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:30:40,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611238390] [2021-11-03 04:30:40,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:30:40,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:30:40,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:30:40,927 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:30:40,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-03 04:30:41,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:30:41,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:30:41,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:30:42,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:30:42,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:30:42,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:30:42,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611238390] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:30:42,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:30:42,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2021-11-03 04:30:42,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386826280] [2021-11-03 04:30:42,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 04:30:42,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:30:42,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 04:30:42,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:30:42,214 INFO L87 Difference]: Start difference. First operand 3898 states and 5233 transitions. Second operand has 10 states, 10 states have (on average 8.1) internal successors, (81), 10 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:30:42,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:30:42,857 INFO L93 Difference]: Finished difference Result 6468 states and 8619 transitions. [2021-11-03 04:30:42,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 04:30:42,858 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.1) internal successors, (81), 10 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-03 04:30:42,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:30:42,865 INFO L225 Difference]: With dead ends: 6468 [2021-11-03 04:30:42,865 INFO L226 Difference]: Without dead ends: 6468 [2021-11-03 04:30:42,867 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 436 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 04:30:42,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6468 states. [2021-11-03 04:30:42,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6468 to 3928. [2021-11-03 04:30:42,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3928 states, 3054 states have (on average 1.7233136869679109) internal successors, (5263), 3927 states have internal predecessors, (5263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:30:42,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 5263 transitions. [2021-11-03 04:30:42,903 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 5263 transitions. Word has length 75 [2021-11-03 04:30:42,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:30:42,903 INFO L470 AbstractCegarLoop]: Abstraction has 3928 states and 5263 transitions. [2021-11-03 04:30:42,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.1) internal successors, (81), 10 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:30:42,904 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 5263 transitions. [2021-11-03 04:30:42,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-03 04:30:42,904 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:30:42,904 INFO L513 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:30:42,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-03 04:30:43,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-03 04:30:43,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-11-03 04:30:43,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:30:43,511 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr400REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 04:30:43,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:30:43,512 INFO L85 PathProgramCache]: Analyzing trace with hash -547693775, now seen corresponding path program 2 times [2021-11-03 04:30:43,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:30:43,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1146566545] [2021-11-03 04:30:43,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:30:43,513 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:30:43,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:30:43,514 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:30:43,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d84d58-f97c-425d-8be2-e65ff5bbddb9/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-03 04:30:44,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-03 04:30:44,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:30:44,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:30:44,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:30:44,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:30:44,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:30:44,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:30:44,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:30:44,709 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-03 04:30:44,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-03 04:30:44,797 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-03 04:30:44,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-03 04:30:45,023 INFO L354 Elim1Store]: treesize reduction 229, result has 11.2 percent of original size [2021-11-03 04:30:45,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 66 treesize of output 86 [2021-11-03 04:30:50,473 INFO L354 Elim1Store]: treesize reduction 1963, result has 5.1 percent of original size [2021-11-03 04:30:50,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 39 case distinctions, treesize of input 118 treesize of output 150 [2021-11-03 04:31:00,021 INFO L354 Elim1Store]: treesize reduction 876, result has 0.1 percent of original size [2021-11-03 04:31:00,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 157 treesize of output 67 [2021-11-03 04:31:00,206 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-03 04:31:00,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:31:10,253 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~user~0.base_331 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~user~0.base_331)))) (forall ((|ULTIMATE.start_main_#t~mem11| (_ BitVec 32)) (|ULTIMATE.start_main_#t~mem12| (_ BitVec 32)) (|ULTIMATE.start_main_#t~mem13| (_ BitVec 32)) (ULTIMATE.start_main_~user~0.offset (_ BitVec 32))) (bvslt (let ((.cse0 (select (store |c_#memory_int| v_ULTIMATE.start_main_~user~0.base_331 (let ((.cse1 (bvmul |ULTIMATE.start_main_#t~mem12| |ULTIMATE.start_main_#t~mem13|))) (store (store (store (store (store (store (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~user~0.base_331) ULTIMATE.start_main_~user~0.offset ((_ extract 7 0) |ULTIMATE.start_main_#t~mem11|)) (bvadd ULTIMATE.start_main_~user~0.offset (_ bv1 32)) ((_ extract 15 8) |ULTIMATE.start_main_#t~mem11|)) (bvadd (_ bv2 32) ULTIMATE.start_main_~user~0.offset) ((_ extract 23 16) |ULTIMATE.start_main_#t~mem11|)) (bvadd (_ bv3 32) ULTIMATE.start_main_~user~0.offset) ((_ extract 31 24) |ULTIMATE.start_main_#t~mem11|)) (bvadd (_ bv4 32) ULTIMATE.start_main_~user~0.offset) ((_ extract 7 0) .cse1)) (bvadd ULTIMATE.start_main_~user~0.offset (_ bv5 32)) ((_ extract 15 8) .cse1)) (bvadd (_ bv6 32) ULTIMATE.start_main_~user~0.offset) ((_ extract 23 16) .cse1)) (bvadd ULTIMATE.start_main_~user~0.offset (_ bv7 32)) ((_ extract 31 24) .cse1)))) |c_ULTIMATE.start_main_~#i~0.base|))) (concat (concat (concat (select .cse0 (bvadd (_ bv3 32) |c_ULTIMATE.start_main_~#i~0.offset|)) (select .cse0 (bvadd (_ bv2 32) |c_ULTIMATE.start_main_~#i~0.offset|))) (select .cse0 (bvadd |c_ULTIMATE.start_main_~#i~0.offset| (_ bv1 32)))) (select .cse0 |c_ULTIMATE.start_main_~#i~0.offset|))) (_ bv10 32))))) is different from false