./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/list-properties/list_search-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/list_search-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/config/svcomp-MemCleanup-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ef935aaf7590747bfbe771bbb249e6b84337edbf0e97024d9de82d0d23d44f30 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:23:27,221 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:23:27,224 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:23:27,292 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:23:27,292 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:23:27,294 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:23:27,295 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:23:27,298 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:23:27,301 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:23:27,302 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:23:27,304 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:23:27,306 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:23:27,306 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:23:27,308 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:23:27,310 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:23:27,312 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:23:27,314 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:23:27,315 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:23:27,318 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:23:27,322 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:23:27,324 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:23:27,326 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:23:27,328 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:23:27,330 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:23:27,335 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:23:27,335 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:23:27,336 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:23:27,337 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:23:27,338 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:23:27,340 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:23:27,340 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:23:27,341 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:23:27,343 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:23:27,344 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:23:27,345 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:23:27,346 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:23:27,347 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:23:27,347 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:23:27,347 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:23:27,349 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:23:27,350 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:23:27,351 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/config/svcomp-MemCleanup-32bit-Taipan_Default.epf [2021-11-07 02:23:27,382 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:23:27,382 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:23:27,383 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:23:27,383 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:23:27,384 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:23:27,384 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:23:27,384 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:23:27,384 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:23:27,385 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:23:27,385 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:23:27,385 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:23:27,385 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:23:27,386 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:23:27,386 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:23:27,386 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:23:27,387 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 02:23:27,387 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 02:23:27,387 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:23:27,388 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:23:27,388 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 02:23:27,388 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:23:27,388 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:23:27,389 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:23:27,389 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 02:23:27,389 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 02:23:27,389 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:23:27,389 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:23:27,390 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:23:27,390 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:23:27,390 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:23:27,390 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:23:27,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:23:27,391 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:23:27,391 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:23:27,391 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:23:27,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:23:27,392 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:23:27,392 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:23:27,392 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_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ef935aaf7590747bfbe771bbb249e6b84337edbf0e97024d9de82d0d23d44f30 [2021-11-07 02:23:27,748 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:23:27,773 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:23:27,775 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:23:27,776 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:23:27,777 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:23:27,778 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/list-properties/list_search-1.i [2021-11-07 02:23:27,854 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/data/092b44ab4/55514ee564694e609bc5da0a6e0383c0/FLAGafa05eef7 [2021-11-07 02:23:28,493 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:23:28,494 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/sv-benchmarks/c/list-properties/list_search-1.i [2021-11-07 02:23:28,510 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/data/092b44ab4/55514ee564694e609bc5da0a6e0383c0/FLAGafa05eef7 [2021-11-07 02:23:28,745 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/data/092b44ab4/55514ee564694e609bc5da0a6e0383c0 [2021-11-07 02:23:28,748 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:23:28,750 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:23:28,756 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:23:28,756 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:23:28,760 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:23:28,761 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:23:28" (1/1) ... [2021-11-07 02:23:28,764 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dc1586b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:28, skipping insertion in model container [2021-11-07 02:23:28,764 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:23:28" (1/1) ... [2021-11-07 02:23:28,774 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:23:28,820 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:23:29,078 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_9ecd3e6a-c984-4f57-81ba-64489525c155/sv-benchmarks/c/list-properties/list_search-1.i[813,826] [2021-11-07 02:23:29,226 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:23:29,238 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) [2021-11-07 02:23:29,239 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@15af20bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:29, skipping insertion in model container [2021-11-07 02:23:29,239 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:23:29,239 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:23:29,242 INFO L168 Benchmark]: Toolchain (without parser) took 490.16 ms. Allocated memory is still 119.5 MB. Free memory was 77.4 MB in the beginning and 91.2 MB in the end (delta: -13.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 02:23:29,243 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 119.5 MB. Free memory is still 94.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:23:29,244 INFO L168 Benchmark]: CACSL2BoogieTranslator took 483.29 ms. Allocated memory is still 119.5 MB. Free memory was 77.2 MB in the beginning and 91.2 MB in the end (delta: -14.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 02:23:29,245 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 119.5 MB. Free memory is still 94.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 483.29 ms. Allocated memory is still 119.5 MB. Free memory was 77.2 MB in the beginning and 91.2 MB in the end (delta: -14.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 542]: 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_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/list_search-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/config/svcomp-MemCleanup-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ef935aaf7590747bfbe771bbb249e6b84337edbf0e97024d9de82d0d23d44f30 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:23:31,975 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:23:31,978 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:23:32,016 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:23:32,017 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:23:32,018 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:23:32,021 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:23:32,024 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:23:32,027 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:23:32,028 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:23:32,030 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:23:32,033 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:23:32,034 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:23:32,039 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:23:32,041 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:23:32,045 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:23:32,048 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:23:32,056 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:23:32,063 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:23:32,069 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:23:32,072 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:23:32,079 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:23:32,081 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:23:32,084 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:23:32,089 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:23:32,094 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:23:32,094 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:23:32,096 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:23:32,098 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:23:32,099 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:23:32,101 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:23:32,102 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:23:32,105 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:23:32,106 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:23:32,108 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:23:32,109 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:23:32,110 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:23:32,110 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:23:32,122 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:23:32,125 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:23:32,126 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:23:32,127 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/config/svcomp-MemCleanup-32bit-Taipan_Bitvector.epf [2021-11-07 02:23:32,180 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:23:32,181 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:23:32,182 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:23:32,183 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:23:32,183 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:23:32,183 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:23:32,183 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:23:32,184 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:23:32,185 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:23:32,186 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 02:23:32,188 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 02:23:32,188 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:23:32,189 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:23:32,189 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 02:23:32,189 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:23:32,189 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:23:32,190 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:23:32,190 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 02:23:32,190 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 02:23:32,191 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:23:32,191 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:23:32,191 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:23:32,191 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:23:32,192 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:23:32,192 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:23:32,192 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:23:32,193 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:23:32,193 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:23:32,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:23:32,193 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:23:32,194 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:23:32,194 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:23:32,194 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:23:32,195 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:23:32,195 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:23:32,195 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_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ef935aaf7590747bfbe771bbb249e6b84337edbf0e97024d9de82d0d23d44f30 [2021-11-07 02:23:32,655 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:23:32,684 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:23:32,686 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:23:32,688 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:23:32,690 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:23:32,691 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/list-properties/list_search-1.i [2021-11-07 02:23:32,760 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/data/5bdef77c0/6498119311f8455ea3e281c144f5da12/FLAG194e9eaf9 [2021-11-07 02:23:33,448 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:23:33,449 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/sv-benchmarks/c/list-properties/list_search-1.i [2021-11-07 02:23:33,472 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/data/5bdef77c0/6498119311f8455ea3e281c144f5da12/FLAG194e9eaf9 [2021-11-07 02:23:33,752 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/data/5bdef77c0/6498119311f8455ea3e281c144f5da12 [2021-11-07 02:23:33,755 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:23:33,758 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:23:33,761 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:23:33,761 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:23:33,765 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:23:33,767 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:23:33" (1/1) ... [2021-11-07 02:23:33,769 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58739972 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:33, skipping insertion in model container [2021-11-07 02:23:33,769 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:23:33" (1/1) ... [2021-11-07 02:23:33,779 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:23:33,845 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:23:34,088 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_9ecd3e6a-c984-4f57-81ba-64489525c155/sv-benchmarks/c/list-properties/list_search-1.i[813,826] [2021-11-07 02:23:34,276 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:23:34,300 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:23:34,316 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:23:34,325 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_9ecd3e6a-c984-4f57-81ba-64489525c155/sv-benchmarks/c/list-properties/list_search-1.i[813,826] [2021-11-07 02:23:34,393 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:23:34,400 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:23:34,414 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_9ecd3e6a-c984-4f57-81ba-64489525c155/sv-benchmarks/c/list-properties/list_search-1.i[813,826] [2021-11-07 02:23:34,438 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:23:34,480 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:23:34,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:34 WrapperNode [2021-11-07 02:23:34,480 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:23:34,485 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:23:34,485 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:23:34,486 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:23:34,494 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:34" (1/1) ... [2021-11-07 02:23:34,530 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:34" (1/1) ... [2021-11-07 02:23:34,575 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:23:34,576 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:23:34,577 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:23:34,577 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:23:34,586 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:34" (1/1) ... [2021-11-07 02:23:34,587 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:34" (1/1) ... [2021-11-07 02:23:34,606 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:34" (1/1) ... [2021-11-07 02:23:34,606 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:34" (1/1) ... [2021-11-07 02:23:34,631 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:34" (1/1) ... [2021-11-07 02:23:34,647 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:34" (1/1) ... [2021-11-07 02:23:34,649 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:34" (1/1) ... [2021-11-07 02:23:34,654 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:23:34,655 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:23:34,655 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:23:34,655 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:23:34,670 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:34" (1/1) ... [2021-11-07 02:23:34,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:23:34,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:23:34,710 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:23:34,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:23:34,785 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 02:23:34,786 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 02:23:34,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 02:23:34,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:23:34,788 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 02:23:34,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 02:23:34,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 02:23:34,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:23:34,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:23:34,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:23:35,634 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:23:35,634 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-11-07 02:23:35,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:23:35 BoogieIcfgContainer [2021-11-07 02:23:35,637 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:23:35,639 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:23:35,639 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:23:35,651 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:23:35,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:23:33" (1/3) ... [2021-11-07 02:23:35,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@249e87bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:23:35, skipping insertion in model container [2021-11-07 02:23:35,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:23:34" (2/3) ... [2021-11-07 02:23:35,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@249e87bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:23:35, skipping insertion in model container [2021-11-07 02:23:35,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:23:35" (3/3) ... [2021-11-07 02:23:35,655 INFO L111 eAbstractionObserver]: Analyzing ICFG list_search-1.i [2021-11-07 02:23:35,662 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:23:35,662 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 45 error locations. [2021-11-07 02:23:35,737 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:23:35,747 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 [2021-11-07 02:23:35,748 INFO L340 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2021-11-07 02:23:35,770 INFO L276 IsEmpty]: Start isEmpty. Operand has 98 states, 52 states have (on average 2.0576923076923075) internal successors, (107), 97 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:35,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-07 02:23:35,777 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:35,778 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-07 02:23:35,780 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-11-07 02:23:35,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:35,787 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-11-07 02:23:35,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:35,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [922012428] [2021-11-07 02:23:35,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:35,803 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:35,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:35,812 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:35,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:23:35,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:35,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:23:35,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:35,991 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 [2021-11-07 02:23:36,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:36,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:36,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:36,036 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:36,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [922012428] [2021-11-07 02:23:36,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [922012428] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:36,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:36,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:23:36,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319670116] [2021-11-07 02:23:36,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:23:36,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:36,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:23:36,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:23:36,069 INFO L87 Difference]: Start difference. First operand has 98 states, 52 states have (on average 2.0576923076923075) internal successors, (107), 97 states have internal predecessors, (107), 0 states have call successors, (0), 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) [2021-11-07 02:23:36,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:36,552 INFO L93 Difference]: Finished difference Result 97 states and 103 transitions. [2021-11-07 02:23:36,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:23:36,553 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 [2021-11-07 02:23:36,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:36,562 INFO L225 Difference]: With dead ends: 97 [2021-11-07 02:23:36,562 INFO L226 Difference]: Without dead ends: 93 [2021-11-07 02:23:36,573 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 [2021-11-07 02:23:36,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-07 02:23:36,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 80. [2021-11-07 02:23:36,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 51 states have (on average 1.6862745098039216) internal successors, (86), 79 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:36,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2021-11-07 02:23:36,614 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 3 [2021-11-07 02:23:36,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:36,618 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2021-11-07 02:23:36,632 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) [2021-11-07 02:23:36,632 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2021-11-07 02:23:36,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-07 02:23:36,633 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:36,633 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-07 02:23:36,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:36,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:36,846 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-11-07 02:23:36,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:36,846 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-11-07 02:23:36,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:36,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [98932883] [2021-11-07 02:23:36,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:36,848 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:36,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:36,856 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:36,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:23:36,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:36,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:23:36,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:36,946 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 [2021-11-07 02:23:36,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:36,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:37,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:37,049 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:37,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [98932883] [2021-11-07 02:23:37,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [98932883] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:37,050 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:37,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 02:23:37,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4097169] [2021-11-07 02:23:37,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:23:37,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:37,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:23:37,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:23:37,053 INFO L87 Difference]: Start difference. First operand 80 states and 86 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) [2021-11-07 02:23:37,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:37,314 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2021-11-07 02:23:37,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:23:37,315 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 [2021-11-07 02:23:37,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:37,317 INFO L225 Difference]: With dead ends: 64 [2021-11-07 02:23:37,317 INFO L226 Difference]: Without dead ends: 64 [2021-11-07 02:23:37,318 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 [2021-11-07 02:23:37,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-07 02:23:37,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-11-07 02:23:37,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 63 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:37,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2021-11-07 02:23:37,327 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 3 [2021-11-07 02:23:37,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:37,327 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2021-11-07 02:23:37,327 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) [2021-11-07 02:23:37,328 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2021-11-07 02:23:37,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-07 02:23:37,329 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:37,329 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] [2021-11-07 02:23:37,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:37,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:37,541 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-11-07 02:23:37,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:37,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1459663056, now seen corresponding path program 1 times [2021-11-07 02:23:37,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:37,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1548813516] [2021-11-07 02:23:37,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:37,544 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:37,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:37,545 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:37,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:23:37,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:37,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:23:37,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:37,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:37,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:37,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:37,917 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:37,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1548813516] [2021-11-07 02:23:37,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1548813516] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:37,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:37,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:23:37,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62256944] [2021-11-07 02:23:37,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:23:37,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:37,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:23:37,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:23:37,921 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 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) [2021-11-07 02:23:38,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:38,153 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2021-11-07 02:23:38,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:23:38,154 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 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 25 [2021-11-07 02:23:38,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:38,156 INFO L225 Difference]: With dead ends: 71 [2021-11-07 02:23:38,156 INFO L226 Difference]: Without dead ends: 71 [2021-11-07 02:23:38,157 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:23:38,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-07 02:23:38,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 62. [2021-11-07 02:23:38,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 49 states have (on average 1.3265306122448979) internal successors, (65), 61 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:38,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2021-11-07 02:23:38,165 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 25 [2021-11-07 02:23:38,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:38,166 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2021-11-07 02:23:38,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 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) [2021-11-07 02:23:38,167 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2021-11-07 02:23:38,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-07 02:23:38,168 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:38,168 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] [2021-11-07 02:23:38,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:38,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:38,372 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-11-07 02:23:38,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:38,373 INFO L85 PathProgramCache]: Analyzing trace with hash -2136563859, now seen corresponding path program 1 times [2021-11-07 02:23:38,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:38,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [241198093] [2021-11-07 02:23:38,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:38,375 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:38,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:38,384 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:38,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:23:38,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:38,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:23:38,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:38,690 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 [2021-11-07 02:23:38,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:38,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:38,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:38,893 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:38,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [241198093] [2021-11-07 02:23:38,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [241198093] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:38,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:38,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:23:38,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238651071] [2021-11-07 02:23:38,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:23:38,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:38,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:23:38,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:23:38,896 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:39,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:39,364 INFO L93 Difference]: Finished difference Result 95 states and 100 transitions. [2021-11-07 02:23:39,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:23:39,365 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 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 28 [2021-11-07 02:23:39,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:39,367 INFO L225 Difference]: With dead ends: 95 [2021-11-07 02:23:39,367 INFO L226 Difference]: Without dead ends: 95 [2021-11-07 02:23:39,367 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:23:39,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-07 02:23:39,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 67. [2021-11-07 02:23:39,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 66 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:39,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2021-11-07 02:23:39,375 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 28 [2021-11-07 02:23:39,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:39,376 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2021-11-07 02:23:39,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:39,377 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2021-11-07 02:23:39,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-07 02:23:39,378 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:39,378 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] [2021-11-07 02:23:39,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:39,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:39,594 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-11-07 02:23:39,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:39,594 INFO L85 PathProgramCache]: Analyzing trace with hash -2136563858, now seen corresponding path program 1 times [2021-11-07 02:23:39,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:39,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [564159621] [2021-11-07 02:23:39,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:39,596 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:39,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:39,597 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:39,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:23:39,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:39,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:23:39,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:39,940 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 [2021-11-07 02:23:40,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:40,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:40,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:40,485 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:40,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [564159621] [2021-11-07 02:23:40,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [564159621] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:40,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:40,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-07 02:23:40,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087213907] [2021-11-07 02:23:40,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:23:40,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:40,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:23:40,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:23:40,489 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:41,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:41,344 INFO L93 Difference]: Finished difference Result 136 states and 142 transitions. [2021-11-07 02:23:41,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:23:41,357 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 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 28 [2021-11-07 02:23:41,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:41,358 INFO L225 Difference]: With dead ends: 136 [2021-11-07 02:23:41,359 INFO L226 Difference]: Without dead ends: 136 [2021-11-07 02:23:41,359 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:23:41,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-07 02:23:41,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 72. [2021-11-07 02:23:41,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 60 states have (on average 1.3166666666666667) internal successors, (79), 71 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:41,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2021-11-07 02:23:41,367 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 28 [2021-11-07 02:23:41,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:41,368 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2021-11-07 02:23:41,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:41,368 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2021-11-07 02:23:41,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-07 02:23:41,370 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:41,370 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] [2021-11-07 02:23:41,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:41,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:41,585 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-11-07 02:23:41,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:41,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1047295973, now seen corresponding path program 1 times [2021-11-07 02:23:41,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:41,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [189810220] [2021-11-07 02:23:41,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:41,587 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:41,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:41,589 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:41,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:23:41,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:41,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:23:41,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:41,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:41,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:42,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:42,098 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:42,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [189810220] [2021-11-07 02:23:42,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [189810220] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:42,100 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:42,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-07 02:23:42,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929088609] [2021-11-07 02:23:42,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:23:42,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:42,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:23:42,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:23:42,105 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:42,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:42,515 INFO L93 Difference]: Finished difference Result 105 states and 111 transitions. [2021-11-07 02:23:42,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:23:42,528 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 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 31 [2021-11-07 02:23:42,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:42,530 INFO L225 Difference]: With dead ends: 105 [2021-11-07 02:23:42,530 INFO L226 Difference]: Without dead ends: 105 [2021-11-07 02:23:42,531 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:23:42,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-07 02:23:42,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 72. [2021-11-07 02:23:42,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 60 states have (on average 1.3) internal successors, (78), 71 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) [2021-11-07 02:23:42,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 78 transitions. [2021-11-07 02:23:42,539 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 78 transitions. Word has length 31 [2021-11-07 02:23:42,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:42,539 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 78 transitions. [2021-11-07 02:23:42,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:42,540 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 78 transitions. [2021-11-07 02:23:42,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 02:23:42,541 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:42,542 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] [2021-11-07 02:23:42,561 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-07 02:23:42,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:42,757 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-11-07 02:23:42,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:42,757 INFO L85 PathProgramCache]: Analyzing trace with hash 126231682, now seen corresponding path program 1 times [2021-11-07 02:23:42,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:42,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1196960527] [2021-11-07 02:23:42,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:42,758 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:42,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:42,761 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:42,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:23:43,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:43,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:23:43,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:43,130 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 [2021-11-07 02:23:43,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:43,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:43,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:43,385 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:43,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1196960527] [2021-11-07 02:23:43,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1196960527] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:43,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:43,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-07 02:23:43,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424258608] [2021-11-07 02:23:43,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:23:43,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:43,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:23:43,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:23:43,388 INFO L87 Difference]: Start difference. First operand 72 states and 78 transitions. Second operand has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:44,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:44,042 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2021-11-07 02:23:44,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:23:44,043 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 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 33 [2021-11-07 02:23:44,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:44,044 INFO L225 Difference]: With dead ends: 92 [2021-11-07 02:23:44,045 INFO L226 Difference]: Without dead ends: 92 [2021-11-07 02:23:44,045 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:23:44,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-07 02:23:44,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 75. [2021-11-07 02:23:44,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 63 states have (on average 1.3015873015873016) internal successors, (82), 74 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:44,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2021-11-07 02:23:44,052 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 33 [2021-11-07 02:23:44,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:44,052 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2021-11-07 02:23:44,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:44,053 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2021-11-07 02:23:44,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 02:23:44,054 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:44,054 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] [2021-11-07 02:23:44,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:44,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:44,255 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-11-07 02:23:44,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:44,256 INFO L85 PathProgramCache]: Analyzing trace with hash 126231683, now seen corresponding path program 1 times [2021-11-07 02:23:44,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:44,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [640491815] [2021-11-07 02:23:44,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:44,257 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:44,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:44,259 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:44,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:23:44,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:44,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 02:23:44,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:44,634 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 [2021-11-07 02:23:44,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:44,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:45,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:45,485 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:45,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [640491815] [2021-11-07 02:23:45,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [640491815] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:45,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:45,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-07 02:23:45,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058182877] [2021-11-07 02:23:45,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 02:23:45,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:45,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 02:23:45,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:23:45,488 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 12 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) [2021-11-07 02:23:47,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:47,998 INFO L93 Difference]: Finished difference Result 132 states and 137 transitions. [2021-11-07 02:23:47,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 02:23:48,000 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 12 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 33 [2021-11-07 02:23:48,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:48,001 INFO L225 Difference]: With dead ends: 132 [2021-11-07 02:23:48,001 INFO L226 Difference]: Without dead ends: 132 [2021-11-07 02:23:48,002 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2021-11-07 02:23:48,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-07 02:23:48,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 75. [2021-11-07 02:23:48,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 63 states have (on average 1.2857142857142858) internal successors, (81), 74 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) [2021-11-07 02:23:48,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2021-11-07 02:23:48,010 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 33 [2021-11-07 02:23:48,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:48,011 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2021-11-07 02:23:48,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 12 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) [2021-11-07 02:23:48,012 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2021-11-07 02:23:48,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 02:23:48,013 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:48,014 INFO L513 BasicCegarLoop]: trace histogram [2, 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] [2021-11-07 02:23:48,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:48,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:48,228 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-11-07 02:23:48,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:48,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1100154086, now seen corresponding path program 1 times [2021-11-07 02:23:48,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:48,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [931004879] [2021-11-07 02:23:48,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:48,230 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:48,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:48,232 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:48,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:23:48,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:48,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 02:23:48,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:48,709 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 [2021-11-07 02:23:48,793 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-07 02:23:48,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 27 [2021-11-07 02:23:49,034 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 38 treesize of output 34 [2021-11-07 02:23:49,494 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 52 treesize of output 40 [2021-11-07 02:23:49,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:49,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:08,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:08,636 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:24:08,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [931004879] [2021-11-07 02:24:08,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [931004879] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:24:08,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1614172744] [2021-11-07 02:24:08,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:08,637 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:24:08,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:24:08,644 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:24:08,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-07 02:24:09,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:09,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 02:24:09,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:09,421 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 [2021-11-07 02:24:09,531 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-07 02:24:09,531 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 15 treesize of output 20 [2021-11-07 02:24:09,721 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 30 treesize of output 26 [2021-11-07 02:24:10,220 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 46 treesize of output 38 [2021-11-07 02:24:10,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:10,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:10,551 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:10,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1614172744] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:24:10,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837559185] [2021-11-07 02:24:10,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:10,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:24:10,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:24:10,557 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:24:10,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 02:24:10,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:10,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 02:24:10,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:10,985 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 [2021-11-07 02:24:11,063 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-07 02:24:11,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 29 [2021-11-07 02:24:11,237 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 38 treesize of output 34 [2021-11-07 02:24:11,574 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 52 treesize of output 40 [2021-11-07 02:24:11,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:11,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:18,291 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:18,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837559185] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:24:18,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:24:18,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 8, 9, 9] total 20 [2021-11-07 02:24:18,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951122329] [2021-11-07 02:24:18,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-07 02:24:18,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:24:18,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-07 02:24:18,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=339, Unknown=9, NotChecked=0, Total=420 [2021-11-07 02:24:18,294 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand has 21 states, 20 states have (on average 3.6) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:20,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:24:20,940 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2021-11-07 02:24:20,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:24:20,941 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.6) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 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 35 [2021-11-07 02:24:20,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:24:20,944 INFO L225 Difference]: With dead ends: 118 [2021-11-07 02:24:20,944 INFO L226 Difference]: Without dead ends: 118 [2021-11-07 02:24:20,945 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 176 SyntacticMatches, 10 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 26.6s TimeCoverageRelationStatistics Valid=198, Invalid=605, Unknown=9, NotChecked=0, Total=812 [2021-11-07 02:24:20,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-07 02:24:20,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 80. [2021-11-07 02:24:20,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 68 states have (on average 1.3088235294117647) internal successors, (89), 79 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:20,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2021-11-07 02:24:20,968 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 35 [2021-11-07 02:24:20,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:24:20,968 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2021-11-07 02:24:20,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.6) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:20,969 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2021-11-07 02:24:20,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 02:24:20,970 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:20,971 INFO L513 BasicCegarLoop]: trace histogram [2, 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] [2021-11-07 02:24:20,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:21,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:21,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-07 02:24:21,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:24:21,585 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-11-07 02:24:21,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:24:21,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1100154087, now seen corresponding path program 1 times [2021-11-07 02:24:21,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:24:21,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1027880167] [2021-11-07 02:24:21,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:21,586 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:24:21,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:24:21,587 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:24:21,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:24:22,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:22,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 02:24:22,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:22,243 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 [2021-11-07 02:24:22,252 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 [2021-11-07 02:24:22,398 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 02:24:22,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-11-07 02:24:22,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-07 02:24:22,558 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 [2021-11-07 02:24:22,570 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 [2021-11-07 02:24:22,942 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 44 treesize of output 32 [2021-11-07 02:24:22,946 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 29 treesize of output 21 [2021-11-07 02:24:23,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:23,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:27,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:27,746 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:24:27,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1027880167] [2021-11-07 02:24:27,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1027880167] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:24:27,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1829660249] [2021-11-07 02:24:27,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:27,747 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:24:27,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:24:27,752 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:24:27,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-07 02:24:28,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:28,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 02:24:28,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:28,623 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 [2021-11-07 02:24:28,630 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 [2021-11-07 02:24:28,766 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 02:24:28,767 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 12 treesize of output 14 [2021-11-07 02:24:28,805 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 02:24:28,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-11-07 02:24:28,950 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 [2021-11-07 02:24:28,980 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 [2021-11-07 02:24:29,204 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 44 treesize of output 32 [2021-11-07 02:24:29,211 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 29 treesize of output 21 [2021-11-07 02:24:29,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:29,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:34,737 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:34,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1829660249] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:24:34,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375865725] [2021-11-07 02:24:34,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:34,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:24:34,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:24:34,746 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:24:34,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-07 02:24:35,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:35,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 02:24:35,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:35,233 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 [2021-11-07 02:24:35,241 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 [2021-11-07 02:24:35,363 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 02:24:35,363 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 17 treesize of output 17 [2021-11-07 02:24:35,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-07 02:24:35,518 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 [2021-11-07 02:24:35,537 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 [2021-11-07 02:24:35,789 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 44 treesize of output 32 [2021-11-07 02:24:35,792 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 29 treesize of output 21 [2021-11-07 02:24:35,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:35,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:41,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:41,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375865725] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:24:41,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:24:41,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 17 [2021-11-07 02:24:41,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297210725] [2021-11-07 02:24:41,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 02:24:41,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:24:41,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 02:24:41,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=256, Unknown=1, NotChecked=0, Total=306 [2021-11-07 02:24:41,090 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand has 18 states, 17 states have (on average 3.411764705882353) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:45,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:24:45,100 INFO L93 Difference]: Finished difference Result 172 states and 180 transitions. [2021-11-07 02:24:45,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 02:24:45,102 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.411764705882353) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 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 35 [2021-11-07 02:24:45,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:24:45,103 INFO L225 Difference]: With dead ends: 172 [2021-11-07 02:24:45,104 INFO L226 Difference]: Without dead ends: 172 [2021-11-07 02:24:45,105 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 185 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=223, Invalid=706, Unknown=1, NotChecked=0, Total=930 [2021-11-07 02:24:45,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-07 02:24:45,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 83. [2021-11-07 02:24:45,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 71 states have (on average 1.295774647887324) internal successors, (92), 82 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:45,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 92 transitions. [2021-11-07 02:24:45,110 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 92 transitions. Word has length 35 [2021-11-07 02:24:45,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:24:45,111 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 92 transitions. [2021-11-07 02:24:45,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.411764705882353) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:45,111 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 92 transitions. [2021-11-07 02:24:45,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 02:24:45,113 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:45,113 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] [2021-11-07 02:24:45,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:45,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:45,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:45,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:24:45,730 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-11-07 02:24:45,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:24:45,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1823223367, now seen corresponding path program 1 times [2021-11-07 02:24:45,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:24:45,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1682353592] [2021-11-07 02:24:45,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:45,731 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:24:45,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:24:45,732 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:24:45,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:24:46,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:46,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 02:24:46,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:46,524 INFO L354 Elim1Store]: treesize reduction 157, result has 14.2 percent of original size [2021-11-07 02:24:46,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 35 [2021-11-07 02:24:46,679 INFO L354 Elim1Store]: treesize reduction 188, result has 15.7 percent of original size [2021-11-07 02:24:46,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 47 [2021-11-07 02:24:46,936 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-07 02:24:46,937 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 66 treesize of output 22 [2021-11-07 02:24:47,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:47,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:47,365 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:24:47,367 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-07 02:24:47,443 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 93 treesize of output 87 [2021-11-07 02:24:47,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:47,774 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:24:47,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1682353592] [2021-11-07 02:24:47,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1682353592] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:24:47,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:24:47,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-07 02:24:47,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012753290] [2021-11-07 02:24:47,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 02:24:47,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:24:47,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 02:24:47,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:24:47,777 INFO L87 Difference]: Start difference. First operand 83 states and 92 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:50,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:24:50,769 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2021-11-07 02:24:50,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 02:24:50,770 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 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 [2021-11-07 02:24:50,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:24:50,771 INFO L225 Difference]: With dead ends: 86 [2021-11-07 02:24:50,771 INFO L226 Difference]: Without dead ends: 86 [2021-11-07 02:24:50,772 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=158, Invalid=394, Unknown=0, NotChecked=0, Total=552 [2021-11-07 02:24:50,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-07 02:24:50,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2021-11-07 02:24:50,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 71 states have (on average 1.2816901408450705) internal successors, (91), 82 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:50,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2021-11-07 02:24:50,776 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 36 [2021-11-07 02:24:50,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:24:50,776 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2021-11-07 02:24:50,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:50,777 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2021-11-07 02:24:50,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 02:24:50,778 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:50,779 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] [2021-11-07 02:24:50,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:50,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:24:50,988 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-11-07 02:24:50,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:24:50,989 INFO L85 PathProgramCache]: Analyzing trace with hash -199167028, now seen corresponding path program 1 times [2021-11-07 02:24:50,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:24:50,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [714974782] [2021-11-07 02:24:50,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:50,990 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:24:50,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:24:50,991 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:24:50,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:24:51,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:51,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 02:24:51,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:51,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-07 02:24:51,964 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 16 treesize of output 8 [2021-11-07 02:24:52,086 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:52,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:52,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:52,455 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:24:52,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [714974782] [2021-11-07 02:24:52,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [714974782] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:24:52,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [978945989] [2021-11-07 02:24:52,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:52,456 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:24:52,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:24:52,460 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:24:52,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-07 02:24:53,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:53,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 02:24:53,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:53,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-07 02:24:53,659 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 16 treesize of output 8 [2021-11-07 02:24:53,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:53,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:53,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:53,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [978945989] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:24:53,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753292050] [2021-11-07 02:24:53,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:53,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:24:53,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:24:53,876 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:24:53,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-07 02:24:54,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:54,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 02:24:54,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:54,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-07 02:24:54,908 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 16 treesize of output 8 [2021-11-07 02:24:54,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:54,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:55,074 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:55,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753292050] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:24:55,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:24:55,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11, 10, 11, 10] total 14 [2021-11-07 02:24:55,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412337556] [2021-11-07 02:24:55,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 02:24:55,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:24:55,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 02:24:55,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:24:55,077 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 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) [2021-11-07 02:24:56,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:24:56,561 INFO L93 Difference]: Finished difference Result 113 states and 119 transitions. [2021-11-07 02:24:56,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 02:24:56,562 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 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 38 [2021-11-07 02:24:56,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:24:56,563 INFO L225 Difference]: With dead ends: 113 [2021-11-07 02:24:56,563 INFO L226 Difference]: Without dead ends: 113 [2021-11-07 02:24:56,564 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=203, Invalid=499, Unknown=0, NotChecked=0, Total=702 [2021-11-07 02:24:56,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-07 02:24:56,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 82. [2021-11-07 02:24:56,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 81 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:56,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 88 transitions. [2021-11-07 02:24:56,568 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 88 transitions. Word has length 38 [2021-11-07 02:24:56,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:24:56,568 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 88 transitions. [2021-11-07 02:24:56,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 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) [2021-11-07 02:24:56,569 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 88 transitions. [2021-11-07 02:24:56,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-07 02:24:56,570 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:56,571 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 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] [2021-11-07 02:24:56,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:56,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:56,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:57,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:24:57,183 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-11-07 02:24:57,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:24:57,184 INFO L85 PathProgramCache]: Analyzing trace with hash -817285811, now seen corresponding path program 2 times [2021-11-07 02:24:57,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:24:57,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1826966837] [2021-11-07 02:24:57,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:24:57,185 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:24:57,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:24:57,195 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:24:57,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ecd3e6a-c984-4f57-81ba-64489525c155/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 02:24:58,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:24:58,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:24:58,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-07 02:24:58,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:58,088 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 [2021-11-07 02:24:58,169 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-07 02:24:58,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 29 [2021-11-07 02:24:58,281 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 29 treesize of output 25 [2021-11-07 02:24:58,441 INFO L354 Elim1Store]: treesize reduction 40, result has 36.5 percent of original size [2021-11-07 02:24:58,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 45 [2021-11-07 02:24:58,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:24:58,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:24:58,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:24:58,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:24:58,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:24:58,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:24:58,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:24:58,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:24:58,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:24:58,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:24:58,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 38 [2021-11-07 02:24:58,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:24:58,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:24:58,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:24:58,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:24:58,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:24:58,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:24:58,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:24:58,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:24:58,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:24:58,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:24:58,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 38 [2021-11-07 02:24:58,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:24:58,983 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-07 02:24:58,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 60 [2021-11-07 02:24:59,209 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 [2021-11-07 02:25:01,053 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 98 treesize of output 90 [2021-11-07 02:25:04,048 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:25:04,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 72 [2021-11-07 02:25:06,136 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:06,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:06,916 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:25:06,917 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 135 [2021-11-07 02:25:09,402 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:25:09,404 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 154 [2021-11-07 02:25:18,461 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_7 (_ BitVec 32)) (v_DerPreprocessor_6 (_ BitVec 32)) (v_ULTIMATE.start_insert_list_~l.base_95 (_ BitVec 32)) (v_DerPreprocessor_5 (_ BitVec 32)) (v_DerPreprocessor_4 (_ BitVec 32)) (v_DerPreprocessor_3 (_ BitVec 32)) (v_DerPreprocessor_2 (_ BitVec 32)) (v_DerPreprocessor_9 (_ BitVec 32)) (v_DerPreprocessor_8 (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| v_ULTIMATE.start_insert_list_~l.base_95 (_ bv1 1)) (select (select (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_insert_list_~l.base_95 (store (store (store (store (store (store (store (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_insert_list_~l.base_95) (_ bv0 32) v_DerPreprocessor_6) (_ bv1 32) v_DerPreprocessor_7) (_ bv2 32) v_DerPreprocessor_8) (_ bv3 32) v_DerPreprocessor_9) (_ bv0 32) v_DerPreprocessor_2) (_ bv1 32) v_DerPreprocessor_3) (_ bv2 32) v_DerPreprocessor_4) (_ bv3 32) v_DerPreprocessor_5) (_ bv4 32) c_~head~0.base)) c_~head~0.base) (bvadd (_ bv4 32) c_~head~0.offset))))))))))))))))))) (_ bv1 1)))) is different from false [2021-11-07 02:25:20,493 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_7 (_ BitVec 32)) (v_DerPreprocessor_6 (_ BitVec 32)) (v_ULTIMATE.start_insert_list_~l.base_95 (_ BitVec 32)) (v_DerPreprocessor_5 (_ BitVec 32)) (v_DerPreprocessor_4 (_ BitVec 32)) (v_DerPreprocessor_3 (_ BitVec 32)) (v_DerPreprocessor_2 (_ BitVec 32)) (v_DerPreprocessor_9 (_ BitVec 32)) (v_DerPreprocessor_8 (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| v_ULTIMATE.start_insert_list_~l.base_95 (_ bv1 1)) (select (select (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_insert_list_~l.base_95 (store (store (store (store (store (store (store (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_insert_list_~l.base_95) (_ bv0 32) v_DerPreprocessor_6) (_ bv1 32) v_DerPreprocessor_7) (_ bv2 32) v_DerPreprocessor_8) (_ bv3 32) v_DerPreprocessor_9) (_ bv0 32) v_DerPreprocessor_2) (_ bv1 32) v_DerPreprocessor_3) (_ bv2 32) v_DerPreprocessor_4) (_ bv3 32) v_DerPreprocessor_5) (_ bv4 32) c_ULTIMATE.start_insert_list_~l.base)) c_ULTIMATE.start_insert_list_~l.base) (bvadd (_ bv4 32) c_ULTIMATE.start_insert_list_~l.offset))))))))))))))))))) (_ bv1 1)))) is different from false