./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/array02-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/array02-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6376f52a263bde0c709cb35a0d040626ae764c5527f8161f54a95df7802768d2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:22:00,270 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:22:00,273 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:22:00,329 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:22:00,330 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:22:00,335 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:22:00,338 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:22:00,343 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:22:00,345 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:22:00,350 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:22:00,351 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:22:00,353 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:22:00,353 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:22:00,356 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:22:00,358 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:22:00,360 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:22:00,362 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:22:00,363 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:22:00,367 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:22:00,375 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:22:00,377 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:22:00,378 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:22:00,381 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:22:00,382 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:22:00,385 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:22:00,386 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:22:00,386 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:22:00,388 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:22:00,389 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:22:00,390 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:22:00,390 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:22:00,391 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:22:00,393 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:22:00,394 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:22:00,396 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:22:00,396 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:22:00,397 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:22:00,397 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:22:00,397 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:22:00,398 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:22:00,398 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:22:00,399 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-03 04:22:00,444 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:22:00,445 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:22:00,446 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:22:00,446 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:22:00,446 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:22:00,447 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:22:00,447 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:22:00,447 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:22:00,447 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:22:00,447 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:22:00,448 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:22:00,448 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:22:00,449 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:22:00,449 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:22:00,449 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:22:00,450 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 04:22:00,450 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 04:22:00,450 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:22:00,450 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:22:00,451 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 04:22:00,451 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:22:00,451 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:22:00,451 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:22:00,451 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 04:22:00,451 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 04:22:00,452 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 04:22:00,452 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:22:00,452 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:22:00,452 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:22:00,452 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:22:00,453 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:22:00,453 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:22:00,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:22:00,453 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:22:00,453 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:22:00,454 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:22:00,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:22:00,454 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:22:00,454 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:22:00,454 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_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6376f52a263bde0c709cb35a0d040626ae764c5527f8161f54a95df7802768d2 [2021-11-03 04:22:00,713 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:22:00,733 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:22:00,735 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:22:00,737 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:22:00,738 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:22:00,738 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/array-memsafety/array02-alloca-2.i [2021-11-03 04:22:00,810 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/data/df75d5496/08e27536e95d466aa8f2650ff65baa0e/FLAGfd1164db8 [2021-11-03 04:22:01,364 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:22:01,366 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/sv-benchmarks/c/array-memsafety/array02-alloca-2.i [2021-11-03 04:22:01,389 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/data/df75d5496/08e27536e95d466aa8f2650ff65baa0e/FLAGfd1164db8 [2021-11-03 04:22:01,640 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/data/df75d5496/08e27536e95d466aa8f2650ff65baa0e [2021-11-03 04:22:01,643 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:22:01,644 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:22:01,652 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:22:01,653 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:22:01,657 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:22:01,658 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:22:01" (1/1) ... [2021-11-03 04:22:01,660 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@af414de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:22:01, skipping insertion in model container [2021-11-03 04:22:01,661 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:22:01" (1/1) ... [2021-11-03 04:22:01,668 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:22:01,724 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:22:02,116 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:22:02,134 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-03 04:22:02,135 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@bca7b32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:22:02, skipping insertion in model container [2021-11-03 04:22:02,135 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:22:02,135 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 04:22:02,138 INFO L168 Benchmark]: Toolchain (without parser) took 491.96 ms. Allocated memory is still 123.7 MB. Free memory was 88.3 MB in the beginning and 97.0 MB in the end (delta: -8.6 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-11-03 04:22:02,140 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 83.9 MB. Free memory was 54.2 MB in the beginning and 54.2 MB in the end (delta: 29.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:22:02,142 INFO L168 Benchmark]: CACSL2BoogieTranslator took 482.96 ms. Allocated memory is still 123.7 MB. Free memory was 88.0 MB in the beginning and 97.0 MB in the end (delta: -8.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-11-03 04:22:02,144 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 83.9 MB. Free memory was 54.2 MB in the beginning and 54.2 MB in the end (delta: 29.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 482.96 ms. Allocated memory is still 123.7 MB. Free memory was 88.0 MB in the beginning and 97.0 MB in the end (delta: -8.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 533]: 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_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/array02-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6376f52a263bde0c709cb35a0d040626ae764c5527f8161f54a95df7802768d2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:22:04,633 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:22:04,637 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:22:04,699 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:22:04,700 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:22:04,705 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:22:04,707 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:22:04,712 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:22:04,716 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:22:04,725 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:22:04,726 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:22:04,729 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:22:04,729 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:22:04,732 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:22:04,735 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:22:04,739 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:22:04,742 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:22:04,743 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:22:04,745 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:22:04,757 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:22:04,759 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:22:04,760 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:22:04,764 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:22:04,766 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:22:04,776 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:22:04,776 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:22:04,777 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:22:04,779 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:22:04,779 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:22:04,781 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:22:04,781 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:22:04,782 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:22:04,784 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:22:04,785 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:22:04,787 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:22:04,787 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:22:04,799 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:22:04,799 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:22:04,799 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:22:04,802 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:22:04,802 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:22:04,803 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-03 04:22:04,852 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:22:04,852 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:22:04,854 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:22:04,854 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:22:04,854 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:22:04,855 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:22:04,855 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:22:04,855 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:22:04,855 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:22:04,857 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 04:22:04,858 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 04:22:04,859 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:22:04,859 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:22:04,859 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 04:22:04,860 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:22:04,860 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:22:04,860 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:22:04,860 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 04:22:04,861 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 04:22:04,861 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 04:22:04,861 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:22:04,861 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:22:04,862 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 04:22:04,862 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 04:22:04,862 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:22:04,862 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:22:04,863 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:22:04,863 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 04:22:04,863 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:22:04,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:22:04,864 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:22:04,864 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:22:04,865 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 04:22:04,865 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 04:22:04,865 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:22:04,866 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:22:04,866 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_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6376f52a263bde0c709cb35a0d040626ae764c5527f8161f54a95df7802768d2 [2021-11-03 04:22:05,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:22:05,372 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:22:05,375 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:22:05,377 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:22:05,379 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:22:05,380 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/array-memsafety/array02-alloca-2.i [2021-11-03 04:22:05,473 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/data/efbf6d394/26a8d23a2f22496db0bd67a756b3c2f4/FLAG610d9fb21 [2021-11-03 04:22:06,297 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:22:06,300 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/sv-benchmarks/c/array-memsafety/array02-alloca-2.i [2021-11-03 04:22:06,325 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/data/efbf6d394/26a8d23a2f22496db0bd67a756b3c2f4/FLAG610d9fb21 [2021-11-03 04:22:06,520 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/data/efbf6d394/26a8d23a2f22496db0bd67a756b3c2f4 [2021-11-03 04:22:06,523 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:22:06,526 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:22:06,530 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:22:06,530 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:22:06,534 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:22:06,535 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:22:06" (1/1) ... [2021-11-03 04:22:06,536 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@270791fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:22:06, skipping insertion in model container [2021-11-03 04:22:06,538 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:22:06" (1/1) ... [2021-11-03 04:22:06,545 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:22:06,595 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:22:07,014 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:22:07,033 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 04:22:07,049 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:22:07,087 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:22:07,093 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:22:07,132 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:22:07,173 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:22:07,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:22:07 WrapperNode [2021-11-03 04:22:07,176 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:22:07,177 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:22:07,178 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:22:07,178 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:22:07,189 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:22:07" (1/1) ... [2021-11-03 04:22:07,213 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:22:07" (1/1) ... [2021-11-03 04:22:07,239 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:22:07,240 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:22:07,240 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:22:07,241 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:22:07,250 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:22:07" (1/1) ... [2021-11-03 04:22:07,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:22:07" (1/1) ... [2021-11-03 04:22:07,255 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:22:07" (1/1) ... [2021-11-03 04:22:07,256 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:22:07" (1/1) ... [2021-11-03 04:22:07,266 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:22:07" (1/1) ... [2021-11-03 04:22:07,281 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:22:07" (1/1) ... [2021-11-03 04:22:07,284 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:22:07" (1/1) ... [2021-11-03 04:22:07,288 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:22:07,289 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:22:07,289 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:22:07,289 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:22:07,290 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:22:07" (1/1) ... [2021-11-03 04:22:07,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:22:07,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:22:07,326 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:22:07,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:22:07,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 04:22:07,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:22:07,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 04:22:07,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 04:22:07,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:22:07,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:22:08,127 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:22:08,128 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-11-03 04:22:08,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:22:08 BoogieIcfgContainer [2021-11-03 04:22:08,130 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:22:08,133 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:22:08,134 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:22:08,138 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:22:08,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:22:06" (1/3) ... [2021-11-03 04:22:08,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12607a3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:22:08, skipping insertion in model container [2021-11-03 04:22:08,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:22:07" (2/3) ... [2021-11-03 04:22:08,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12607a3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:22:08, skipping insertion in model container [2021-11-03 04:22:08,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:22:08" (3/3) ... [2021-11-03 04:22:08,143 INFO L111 eAbstractionObserver]: Analyzing ICFG array02-alloca-2.i [2021-11-03 04:22:08,150 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:22:08,150 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2021-11-03 04:22:08,243 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:22:08,251 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 04:22:08,251 INFO L340 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2021-11-03 04:22:08,268 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 41 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:08,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-03 04:22:08,276 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:22:08,276 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-03 04:22:08,277 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-03 04:22:08,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:22:08,284 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2021-11-03 04:22:08,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:22:08,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1990610179] [2021-11-03 04:22:08,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:22:08,302 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:22:08,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:22:08,318 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:22:08,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 04:22:08,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:22:08,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:22:08,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:08,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:22:08,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:08,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:08,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:08,586 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:22:08,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1990610179] [2021-11-03 04:22:08,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1990610179] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:22:08,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:22:08,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:22:08,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262191834] [2021-11-03 04:22:08,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:22:08,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:22:08,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:22:08,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:22:08,617 INFO L87 Difference]: Start difference. First operand has 42 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 41 states have internal predecessors, (50), 0 states have call successors, (0), 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 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:08,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:22:08,776 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2021-11-03 04:22:08,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:22:08,778 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-11-03 04:22:08,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:22:08,787 INFO L225 Difference]: With dead ends: 41 [2021-11-03 04:22:08,787 INFO L226 Difference]: Without dead ends: 39 [2021-11-03 04:22:08,789 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:22:08,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-03 04:22:08,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-11-03 04:22:08,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.72) internal successors, (43), 38 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:08,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2021-11-03 04:22:08,835 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 6 [2021-11-03 04:22:08,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:22:08,836 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2021-11-03 04:22:08,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:08,836 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2021-11-03 04:22:08,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-03 04:22:08,837 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:22:08,837 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-03 04:22:08,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:09,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:22:09,052 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-03 04:22:09,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:22:09,053 INFO L85 PathProgramCache]: Analyzing trace with hash 889508874, now seen corresponding path program 1 times [2021-11-03 04:22:09,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:22:09,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1546380205] [2021-11-03 04:22:09,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:22:09,054 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:22:09,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:22:09,057 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:22:09,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 04:22:09,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:22:09,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:22:09,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:09,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:22:09,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:09,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:09,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:09,557 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:22:09,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1546380205] [2021-11-03 04:22:09,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1546380205] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:22:09,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:22:09,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 04:22:09,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509273841] [2021-11-03 04:22:09,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:22:09,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:22:09,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:22:09,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:22:09,562 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:10,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:22:10,560 INFO L93 Difference]: Finished difference Result 111 states and 121 transitions. [2021-11-03 04:22:10,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:22:10,562 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 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 6 [2021-11-03 04:22:10,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:22:10,564 INFO L225 Difference]: With dead ends: 111 [2021-11-03 04:22:10,564 INFO L226 Difference]: Without dead ends: 111 [2021-11-03 04:22:10,565 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:22:10,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-03 04:22:10,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 43. [2021-11-03 04:22:10,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 42 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:10,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2021-11-03 04:22:10,574 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 6 [2021-11-03 04:22:10,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:22:10,574 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2021-11-03 04:22:10,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:10,575 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2021-11-03 04:22:10,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 04:22:10,575 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:22:10,575 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:22:10,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:10,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:22:10,786 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-03 04:22:10,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:22:10,787 INFO L85 PathProgramCache]: Analyzing trace with hash 176742583, now seen corresponding path program 1 times [2021-11-03 04:22:10,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:22:10,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1737260675] [2021-11-03 04:22:10,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:22:10,788 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:22:10,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:22:10,790 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:22:10,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 04:22:10,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:22:10,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:22:10,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:10,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:22:10,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:10,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:10,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:10,962 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:22:10,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1737260675] [2021-11-03 04:22:10,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1737260675] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:22:10,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:22:10,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:22:10,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387149922] [2021-11-03 04:22:10,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:22:10,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:22:10,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:22:10,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:22:10,969 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:11,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:22:11,175 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-11-03 04:22:11,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:22:11,176 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-03 04:22:11,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:22:11,176 INFO L225 Difference]: With dead ends: 37 [2021-11-03 04:22:11,176 INFO L226 Difference]: Without dead ends: 37 [2021-11-03 04:22:11,177 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:22:11,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-03 04:22:11,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-03 04:22:11,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:11,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2021-11-03 04:22:11,182 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 8 [2021-11-03 04:22:11,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:22:11,182 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2021-11-03 04:22:11,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:11,182 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2021-11-03 04:22:11,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 04:22:11,183 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:22:11,183 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:22:11,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:11,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:22:11,403 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-03 04:22:11,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:22:11,404 INFO L85 PathProgramCache]: Analyzing trace with hash 176742584, now seen corresponding path program 1 times [2021-11-03 04:22:11,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:22:11,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1626793317] [2021-11-03 04:22:11,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:22:11,405 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:22:11,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:22:11,407 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:22:11,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 04:22:11,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:22:11,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-03 04:22:11,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:11,508 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 8 treesize of output 7 [2021-11-03 04:22:11,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:11,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:12,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:12,094 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:22:12,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1626793317] [2021-11-03 04:22:12,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1626793317] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:22:12,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:22:12,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 8 [2021-11-03 04:22:12,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604799678] [2021-11-03 04:22:12,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:22:12,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:22:12,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:22:12,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:22:12,097 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:12,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:22:12,638 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2021-11-03 04:22:12,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:22:12,641 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-03 04:22:12,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:22:12,641 INFO L225 Difference]: With dead ends: 39 [2021-11-03 04:22:12,642 INFO L226 Difference]: Without dead ends: 39 [2021-11-03 04:22:12,642 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:22:12,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-03 04:22:12,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2021-11-03 04:22:12,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 31 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:12,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-11-03 04:22:12,647 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 8 [2021-11-03 04:22:12,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:22:12,648 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-11-03 04:22:12,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:12,648 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-11-03 04:22:12,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-03 04:22:12,650 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:22:12,650 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:22:12,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:12,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:22:12,855 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-03 04:22:12,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:22:12,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1091210163, now seen corresponding path program 1 times [2021-11-03 04:22:12,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:22:12,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [657492601] [2021-11-03 04:22:12,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:22:12,857 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:22:12,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:22:12,859 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:22:12,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 04:22:12,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:22:12,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:22:12,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:13,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:13,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:13,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:13,126 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:22:13,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [657492601] [2021-11-03 04:22:13,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [657492601] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:22:13,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1989770556] [2021-11-03 04:22:13,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:22:13,128 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:22:13,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:22:13,130 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:22:13,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-03 04:22:13,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:22:13,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:22:13,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:13,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:13,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:13,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:13,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1989770556] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:22:13,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488758282] [2021-11-03 04:22:13,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:22:13,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:22:13,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:22:13,375 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:22:13,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-03 04:22:13,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:22:13,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:22:13,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:13,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:13,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:13,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:13,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488758282] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:22:13,615 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:22:13,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-03 04:22:13,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193600610] [2021-11-03 04:22:13,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:22:13,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:22:13,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:22:13,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:22:13,618 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:13,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:22:13,721 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2021-11-03 04:22:13,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:22:13,722 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-03 04:22:13,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:22:13,723 INFO L225 Difference]: With dead ends: 59 [2021-11-03 04:22:13,723 INFO L226 Difference]: Without dead ends: 59 [2021-11-03 04:22:13,724 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:22:13,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-03 04:22:13,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 38. [2021-11-03 04:22:13,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 37 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:13,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2021-11-03 04:22:13,729 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 10 [2021-11-03 04:22:13,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:22:13,729 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2021-11-03 04:22:13,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:13,730 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2021-11-03 04:22:13,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-03 04:22:13,730 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:22:13,731 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:22:13,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:13,948 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2021-11-03 04:22:14,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:14,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:22:14,347 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-03 04:22:14,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:22:14,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2021-11-03 04:22:14,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:22:14,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [905434568] [2021-11-03 04:22:14,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:22:14,349 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:22:14,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:22:14,350 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:22:14,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 04:22:14,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:22:14,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 04:22:14,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:14,507 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 8 treesize of output 7 [2021-11-03 04:22:14,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:14,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:15,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:15,443 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:22:15,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [905434568] [2021-11-03 04:22:15,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [905434568] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:22:15,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1257084615] [2021-11-03 04:22:15,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:22:15,444 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:22:15,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:22:15,445 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:22:15,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-03 04:22:15,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:22:15,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 04:22:15,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:15,657 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 8 treesize of output 7 [2021-11-03 04:22:15,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:15,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:16,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:16,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1257084615] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:22:16,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315309467] [2021-11-03 04:22:16,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:22:16,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:22:16,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:22:16,175 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:22:16,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-03 04:22:16,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:22:16,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 04:22:16,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:16,370 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 8 treesize of output 7 [2021-11-03 04:22:16,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:16,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:16,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:16,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315309467] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:22:16,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:22:16,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 9 [2021-11-03 04:22:16,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862461815] [2021-11-03 04:22:16,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 04:22:16,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:22:16,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 04:22:16,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:22:16,826 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:18,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:22:18,142 INFO L93 Difference]: Finished difference Result 92 states and 106 transitions. [2021-11-03 04:22:18,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-03 04:22:18,145 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 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 10 [2021-11-03 04:22:18,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:22:18,146 INFO L225 Difference]: With dead ends: 92 [2021-11-03 04:22:18,146 INFO L226 Difference]: Without dead ends: 92 [2021-11-03 04:22:18,146 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-11-03 04:22:18,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-03 04:22:18,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 50. [2021-11-03 04:22:18,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 49 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) [2021-11-03 04:22:18,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2021-11-03 04:22:18,152 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 10 [2021-11-03 04:22:18,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:22:18,153 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2021-11-03 04:22:18,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:18,153 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2021-11-03 04:22:18,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-03 04:22:18,154 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:22:18,154 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:22:18,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:18,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:18,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:18,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:22:18,755 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-03 04:22:18,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:22:18,756 INFO L85 PathProgramCache]: Analyzing trace with hash 363893421, now seen corresponding path program 1 times [2021-11-03 04:22:18,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:22:18,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [908286551] [2021-11-03 04:22:18,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:22:18,756 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:22:18,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:22:18,758 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:22:18,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 04:22:18,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:22:18,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:22:18,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:18,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:22:18,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:19,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:22:19,046 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:22:19,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [908286551] [2021-11-03 04:22:19,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [908286551] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:22:19,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:22:19,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:22:19,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344314502] [2021-11-03 04:22:19,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:22:19,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:22:19,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:22:19,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:22:19,048 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:19,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:22:19,254 INFO L93 Difference]: Finished difference Result 84 states and 95 transitions. [2021-11-03 04:22:19,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:22:19,255 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-03 04:22:19,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:22:19,257 INFO L225 Difference]: With dead ends: 84 [2021-11-03 04:22:19,257 INFO L226 Difference]: Without dead ends: 84 [2021-11-03 04:22:19,258 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:22:19,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-03 04:22:19,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 50. [2021-11-03 04:22:19,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 49 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:19,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2021-11-03 04:22:19,264 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 13 [2021-11-03 04:22:19,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:22:19,265 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2021-11-03 04:22:19,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:19,265 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2021-11-03 04:22:19,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-03 04:22:19,266 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:22:19,266 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:22:19,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:19,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:22:19,479 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-03 04:22:19,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:22:19,480 INFO L85 PathProgramCache]: Analyzing trace with hash -2110205631, now seen corresponding path program 1 times [2021-11-03 04:22:19,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:22:19,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1803839442] [2021-11-03 04:22:19,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:22:19,480 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:22:19,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:22:19,481 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:22:19,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 04:22:19,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:22:19,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:22:19,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:19,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:22:19,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:19,917 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:22:19,917 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:22:19,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1803839442] [2021-11-03 04:22:19,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1803839442] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:22:19,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1531443394] [2021-11-03 04:22:19,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:22:19,918 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:22:19,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:22:19,923 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:22:19,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-03 04:22:20,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:22:20,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:22:20,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:20,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:22:20,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:20,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:22:20,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1531443394] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:22:20,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526414367] [2021-11-03 04:22:20,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:22:20,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:22:20,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:22:20,355 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:22:20,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-03 04:22:20,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:22:20,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:22:20,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:20,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:22:20,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:20,718 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:22:20,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526414367] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:22:20,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:22:20,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-03 04:22:20,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486177323] [2021-11-03 04:22:20,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:22:20,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:22:20,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:22:20,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:22:20,720 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 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) [2021-11-03 04:22:20,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:22:20,941 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2021-11-03 04:22:20,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:22:20,942 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 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 18 [2021-11-03 04:22:20,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:22:20,943 INFO L225 Difference]: With dead ends: 69 [2021-11-03 04:22:20,943 INFO L226 Difference]: Without dead ends: 69 [2021-11-03 04:22:20,944 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:22:20,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-03 04:22:20,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2021-11-03 04:22:20,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 63 states have (on average 1.1904761904761905) internal successors, (75), 65 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:20,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 75 transitions. [2021-11-03 04:22:20,950 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 75 transitions. Word has length 18 [2021-11-03 04:22:20,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:22:20,950 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 75 transitions. [2021-11-03 04:22:20,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 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) [2021-11-03 04:22:20,951 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 75 transitions. [2021-11-03 04:22:20,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-03 04:22:20,952 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:22:20,952 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:22:20,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:21,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:21,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:21,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:22:21,567 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-03 04:22:21,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:22:21,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1163693311, now seen corresponding path program 1 times [2021-11-03 04:22:21,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:22:21,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [121255126] [2021-11-03 04:22:21,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:22:21,568 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:22:21,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:22:21,569 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:22:21,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 04:22:21,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:22:21,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-03 04:22:21,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:21,831 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 8 treesize of output 7 [2021-11-03 04:22:22,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:22:22,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:23,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:22:23,246 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:22:23,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [121255126] [2021-11-03 04:22:23,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [121255126] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:22:23,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1246767983] [2021-11-03 04:22:23,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:22:23,246 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:22:23,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:22:23,255 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:22:23,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-03 04:22:23,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:22:23,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 04:22:23,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:24,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:24,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:24,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:24,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1246767983] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:22:24,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807831730] [2021-11-03 04:22:24,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:22:24,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:22:24,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:22:24,441 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:22:24,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-03 04:22:24,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:22:24,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-03 04:22:24,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:24,745 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 8 treesize of output 7 [2021-11-03 04:22:25,074 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:22:25,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:25,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:22:25,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807831730] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:22:25,476 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:22:25,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8, 7, 6, 6] total 22 [2021-11-03 04:22:25,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022663361] [2021-11-03 04:22:25,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-03 04:22:25,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:22:25,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-03 04:22:25,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-11-03 04:22:25,479 INFO L87 Difference]: Start difference. First operand 66 states and 75 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:28,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:22:28,886 INFO L93 Difference]: Finished difference Result 136 states and 153 transitions. [2021-11-03 04:22:28,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-03 04:22:28,888 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-03 04:22:28,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:22:28,889 INFO L225 Difference]: With dead ends: 136 [2021-11-03 04:22:28,889 INFO L226 Difference]: Without dead ends: 136 [2021-11-03 04:22:28,890 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=311, Invalid=1249, Unknown=0, NotChecked=0, Total=1560 [2021-11-03 04:22:28,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-03 04:22:28,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 108. [2021-11-03 04:22:28,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 105 states have (on average 1.2) internal successors, (126), 107 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:28,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 126 transitions. [2021-11-03 04:22:28,898 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 126 transitions. Word has length 18 [2021-11-03 04:22:28,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:22:28,898 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 126 transitions. [2021-11-03 04:22:28,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:28,899 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 126 transitions. [2021-11-03 04:22:28,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-03 04:22:28,900 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:22:28,900 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:22:28,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:29,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:29,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:29,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:22:29,515 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-03 04:22:29,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:22:29,516 INFO L85 PathProgramCache]: Analyzing trace with hash -991865623, now seen corresponding path program 1 times [2021-11-03 04:22:29,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:22:29,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [749531721] [2021-11-03 04:22:29,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:22:29,516 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:22:29,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:22:29,517 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:22:29,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 04:22:29,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:22:29,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:22:29,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:29,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:22:30,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 04:22:30,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:32,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 04:22:32,178 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:22:32,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [749531721] [2021-11-03 04:22:32,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [749531721] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:22:32,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:22:32,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 7 [2021-11-03 04:22:32,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292907971] [2021-11-03 04:22:32,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:22:32,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:22:32,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:22:32,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=37, Unknown=1, NotChecked=0, Total=56 [2021-11-03 04:22:32,181 INFO L87 Difference]: Start difference. First operand 108 states and 126 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) [2021-11-03 04:22:32,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:22:32,376 INFO L93 Difference]: Finished difference Result 107 states and 125 transitions. [2021-11-03 04:22:32,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:22:32,378 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 19 [2021-11-03 04:22:32,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:22:32,379 INFO L225 Difference]: With dead ends: 107 [2021-11-03 04:22:32,379 INFO L226 Difference]: Without dead ends: 83 [2021-11-03 04:22:32,379 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=23, Invalid=48, Unknown=1, NotChecked=0, Total=72 [2021-11-03 04:22:32,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-03 04:22:32,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-11-03 04:22:32,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 81 states have (on average 1.1604938271604939) internal successors, (94), 82 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:32,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 94 transitions. [2021-11-03 04:22:32,385 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 94 transitions. Word has length 19 [2021-11-03 04:22:32,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:22:32,385 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 94 transitions. [2021-11-03 04:22:32,386 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) [2021-11-03 04:22:32,386 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 94 transitions. [2021-11-03 04:22:32,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-03 04:22:32,387 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:22:32,387 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1] [2021-11-03 04:22:32,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:32,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:22:32,602 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-03 04:22:32,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:22:32,602 INFO L85 PathProgramCache]: Analyzing trace with hash 302966996, now seen corresponding path program 2 times [2021-11-03 04:22:32,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:22:32,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1554140910] [2021-11-03 04:22:32,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:22:32,603 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:22:32,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:22:32,603 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:22:32,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-03 04:22:32,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:22:32,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:22:33,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-03 04:22:33,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:33,056 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 8 treesize of output 7 [2021-11-03 04:22:33,888 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:33,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:36,013 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:36,013 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:22:36,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1554140910] [2021-11-03 04:22:36,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1554140910] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:22:36,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1371361351] [2021-11-03 04:22:36,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:22:36,014 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:22:36,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:22:36,024 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:22:36,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-03 04:22:36,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:22:36,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:22:36,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-03 04:22:36,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:36,487 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 8 treesize of output 7 [2021-11-03 04:22:36,931 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:36,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:37,723 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:37,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1371361351] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:22:37,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981003987] [2021-11-03 04:22:37,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:22:37,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:22:37,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:22:37,725 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:22:37,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-03 04:22:38,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:22:38,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:22:38,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-03 04:22:38,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:38,196 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 8 treesize of output 7 [2021-11-03 04:22:38,765 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:38,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:40,881 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:40,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981003987] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:22:40,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:22:40,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 10, 10] total 22 [2021-11-03 04:22:40,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338560442] [2021-11-03 04:22:40,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-03 04:22:40,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:22:40,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-03 04:22:40,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2021-11-03 04:22:40,884 INFO L87 Difference]: Start difference. First operand 83 states and 94 transitions. Second operand has 23 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 23 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) [2021-11-03 04:22:48,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:22:48,867 INFO L93 Difference]: Finished difference Result 527 states and 600 transitions. [2021-11-03 04:22:48,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-03 04:22:48,869 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 23 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 22 [2021-11-03 04:22:48,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:22:48,872 INFO L225 Difference]: With dead ends: 527 [2021-11-03 04:22:48,872 INFO L226 Difference]: Without dead ends: 527 [2021-11-03 04:22:48,873 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=379, Invalid=811, Unknown=0, NotChecked=0, Total=1190 [2021-11-03 04:22:48,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-11-03 04:22:48,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 107. [2021-11-03 04:22:48,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 105 states have (on average 1.180952380952381) internal successors, (124), 106 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:48,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 124 transitions. [2021-11-03 04:22:48,884 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 124 transitions. Word has length 22 [2021-11-03 04:22:48,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:22:48,885 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 124 transitions. [2021-11-03 04:22:48,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 23 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) [2021-11-03 04:22:48,885 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 124 transitions. [2021-11-03 04:22:48,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-03 04:22:48,887 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:22:48,887 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:22:48,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:49,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:49,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:49,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:22:49,515 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-03 04:22:49,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:22:49,516 INFO L85 PathProgramCache]: Analyzing trace with hash 408917070, now seen corresponding path program 2 times [2021-11-03 04:22:49,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:22:49,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1845864688] [2021-11-03 04:22:49,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:22:49,517 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:22:49,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:22:49,517 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:22:49,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-03 04:22:49,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:22:49,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:22:49,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-03 04:22:49,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:49,996 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 8 treesize of output 7 [2021-11-03 04:22:50,954 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:50,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:54,131 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:54,131 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:22:54,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1845864688] [2021-11-03 04:22:54,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1845864688] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:22:54,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1216689254] [2021-11-03 04:22:54,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:22:54,131 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:22:54,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:22:54,132 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:22:54,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-03 04:22:54,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:22:54,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:22:54,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-03 04:22:54,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:55,742 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-03 04:22:55,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:56,933 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-03 04:22:56,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1216689254] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:22:56,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873600495] [2021-11-03 04:22:56,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:22:56,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:22:56,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:22:56,939 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:22:56,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-03 04:22:57,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:22:57,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:22:57,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-03 04:22:57,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:58,424 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:22:58,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:59,335 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:22:59,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873600495] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:22:59,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:22:59,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11, 10, 11, 10] total 49 [2021-11-03 04:22:59,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228508082] [2021-11-03 04:22:59,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-03 04:22:59,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:22:59,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-03 04:22:59,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=2100, Unknown=0, NotChecked=0, Total=2352 [2021-11-03 04:22:59,338 INFO L87 Difference]: Start difference. First operand 107 states and 124 transitions. Second operand has 49 states, 49 states have (on average 3.4693877551020407) internal successors, (170), 49 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:23:14,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:23:14,781 INFO L93 Difference]: Finished difference Result 188 states and 213 transitions. [2021-11-03 04:23:14,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-03 04:23:14,783 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.4693877551020407) internal successors, (170), 49 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-03 04:23:14,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:23:14,784 INFO L225 Difference]: With dead ends: 188 [2021-11-03 04:23:14,784 INFO L226 Difference]: Without dead ends: 111 [2021-11-03 04:23:14,786 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=646, Invalid=3776, Unknown=0, NotChecked=0, Total=4422 [2021-11-03 04:23:14,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-03 04:23:14,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2021-11-03 04:23:14,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 105 states have (on average 1.161904761904762) internal successors, (122), 106 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:23:14,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 122 transitions. [2021-11-03 04:23:14,792 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 122 transitions. Word has length 40 [2021-11-03 04:23:14,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:23:14,793 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 122 transitions. [2021-11-03 04:23:14,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.4693877551020407) internal successors, (170), 49 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:23:14,793 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 122 transitions. [2021-11-03 04:23:14,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-03 04:23:14,796 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:23:14,796 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1] [2021-11-03 04:23:14,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-03 04:23:15,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-03 04:23:15,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-03 04:23:15,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:23:15,410 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-03 04:23:15,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:23:15,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1048882662, now seen corresponding path program 3 times [2021-11-03 04:23:15,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:23:15,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1036507831] [2021-11-03 04:23:15,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:23:15,411 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:23:15,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:23:15,413 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:23:15,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-03 04:23:16,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-03 04:23:16,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:23:16,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-03 04:23:16,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:23:16,519 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 8 treesize of output 7 [2021-11-03 04:23:17,939 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:23:17,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:23:23,342 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:23:23,342 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:23:23,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1036507831] [2021-11-03 04:23:23,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1036507831] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:23:23,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [295662238] [2021-11-03 04:23:23,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:23:23,343 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:23:23,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:23:23,345 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:23:23,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-03 04:23:26,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-03 04:23:26,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:23:26,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-03 04:23:26,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:23:26,536 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 8 treesize of output 7 [2021-11-03 04:23:28,302 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:23:28,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:23:48,175 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:23:48,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [295662238] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:23:48,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503405751] [2021-11-03 04:23:48,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:23:48,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:23:48,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:23:48,177 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:23:48,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-03 04:23:54,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-03 04:23:54,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:23:54,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-03 04:23:54,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:23:54,735 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 8 treesize of output 7 [2021-11-03 04:23:56,704 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:23:56,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:24:12,287 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:24:12,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503405751] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:24:12,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:24:12,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 17, 21, 19, 19] total 67 [2021-11-03 04:24:12,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435987437] [2021-11-03 04:24:12,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-03 04:24:12,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:24:12,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-03 04:24:12,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1222, Invalid=3334, Unknown=0, NotChecked=0, Total=4556 [2021-11-03 04:24:12,293 INFO L87 Difference]: Start difference. First operand 107 states and 122 transitions. Second operand has 68 states, 67 states have (on average 3.0) internal successors, (201), 68 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:24:22,320 WARN L207 SmtUtils]: Spent 5.93 s on a formula simplification that was a NOOP. DAG size: 129 [2021-11-03 04:24:28,302 WARN L207 SmtUtils]: Spent 5.38 s on a formula simplification that was a NOOP. DAG size: 125 [2021-11-03 04:24:48,117 WARN L207 SmtUtils]: Spent 5.23 s on a formula simplification that was a NOOP. DAG size: 119 [2021-11-03 04:26:21,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:26:21,343 INFO L93 Difference]: Finished difference Result 1175 states and 1338 transitions. [2021-11-03 04:26:21,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-03 04:26:21,346 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 3.0) internal successors, (201), 68 states have internal predecessors, (201), 0 states have call successors, (0), 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 46 [2021-11-03 04:26:21,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:26:21,353 INFO L225 Difference]: With dead ends: 1175 [2021-11-03 04:26:21,353 INFO L226 Difference]: Without dead ends: 1175 [2021-11-03 04:26:21,357 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 206 SyntacticMatches, 5 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3667 ImplicationChecksByTransitivity, 88.4s TimeCoverageRelationStatistics Valid=2582, Invalid=6348, Unknown=0, NotChecked=0, Total=8930 [2021-11-03 04:26:21,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2021-11-03 04:26:21,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 155. [2021-11-03 04:26:21,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 153 states have (on average 1.1895424836601307) internal successors, (182), 154 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:21,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 182 transitions. [2021-11-03 04:26:21,391 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 182 transitions. Word has length 46 [2021-11-03 04:26:21,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:26:21,391 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 182 transitions. [2021-11-03 04:26:21,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 3.0) internal successors, (201), 68 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:21,392 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 182 transitions. [2021-11-03 04:26:21,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-03 04:26:21,394 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:26:21,395 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:26:21,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-03 04:26:21,627 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-11-03 04:26:21,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2021-11-03 04:26:22,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:26:22,013 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-03 04:26:22,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:26:22,014 INFO L85 PathProgramCache]: Analyzing trace with hash 82156500, now seen corresponding path program 3 times [2021-11-03 04:26:22,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:26:22,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [476353685] [2021-11-03 04:26:22,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:26:22,015 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:26:22,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:26:22,016 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:26:22,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-03 04:26:23,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-03 04:26:23,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:26:23,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-03 04:26:23,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:26:23,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-03 04:26:24,607 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-03 04:26:24,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:26:28,376 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-03 04:26:28,376 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:26:28,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [476353685] [2021-11-03 04:26:28,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [476353685] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:26:28,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [711554911] [2021-11-03 04:26:28,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:26:28,379 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:26:28,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:26:28,380 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:26:28,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-03 04:26:30,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-03 04:26:30,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:26:30,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-03 04:26:30,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:26:30,650 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 8 treesize of output 7 [2021-11-03 04:26:32,843 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 4 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:26:32,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:26:51,219 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:26:51,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [711554911] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:26:51,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857300289] [2021-11-03 04:26:51,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:26:51,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:26:51,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:26:51,221 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:26:51,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-03 04:26:53,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-03 04:26:53,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:26:53,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-03 04:26:53,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:26:53,066 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 8 treesize of output 7 [2021-11-03 04:26:54,127 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-03 04:26:54,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:26:59,189 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-03 04:26:59,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857300289] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:26:59,190 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:26:59,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15, 18, 10, 10] total 49 [2021-11-03 04:26:59,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988855113] [2021-11-03 04:26:59,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-03 04:26:59,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:26:59,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-03 04:26:59,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=1940, Unknown=0, NotChecked=0, Total=2352 [2021-11-03 04:26:59,193 INFO L87 Difference]: Start difference. First operand 155 states and 182 transitions. Second operand has 49 states, 49 states have (on average 3.6530612244897958) internal successors, (179), 49 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:18,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:27:18,364 INFO L93 Difference]: Finished difference Result 303 states and 349 transitions. [2021-11-03 04:27:18,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-03 04:27:18,366 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.6530612244897958) internal successors, (179), 49 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-03 04:27:18,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:27:18,368 INFO L225 Difference]: With dead ends: 303 [2021-11-03 04:27:18,368 INFO L226 Difference]: Without dead ends: 245 [2021-11-03 04:27:18,371 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1393 ImplicationChecksByTransitivity, 25.9s TimeCoverageRelationStatistics Valid=1305, Invalid=4245, Unknown=0, NotChecked=0, Total=5550 [2021-11-03 04:27:18,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-11-03 04:27:18,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 239. [2021-11-03 04:27:18,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 237 states have (on average 1.1687763713080168) internal successors, (277), 238 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:18,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 277 transitions. [2021-11-03 04:27:18,379 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 277 transitions. Word has length 48 [2021-11-03 04:27:18,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:27:18,380 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 277 transitions. [2021-11-03 04:27:18,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.6530612244897958) internal successors, (179), 49 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:18,380 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 277 transitions. [2021-11-03 04:27:18,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-03 04:27:18,385 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:27:18,385 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:27:18,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-03 04:27:18,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-03 04:27:18,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-11-03 04:27:18,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:27:18,999 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-03 04:27:18,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:27:19,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1296990993, now seen corresponding path program 4 times [2021-11-03 04:27:19,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:27:19,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [230744384] [2021-11-03 04:27:19,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 04:27:19,001 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:27:19,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:27:19,003 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:27:19,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-03 04:27:20,576 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 04:27:20,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:27:20,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-03 04:27:20,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:20,626 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 8 treesize of output 7 [2021-11-03 04:27:23,054 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 122 proven. 199 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-03 04:27:23,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:34,428 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:34,428 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:27:34,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [230744384] [2021-11-03 04:27:34,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [230744384] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:27:34,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2011217376] [2021-11-03 04:27:34,428 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 04:27:34,428 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:27:34,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:27:34,429 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:27:34,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-03 04:27:36,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 04:27:36,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:27:36,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-03 04:27:36,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:40,134 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 160 proven. 110 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-03 04:27:40,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:44,900 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 160 proven. 110 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-03 04:27:44,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2011217376] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:27:44,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963413670] [2021-11-03 04:27:44,901 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 04:27:44,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:27:44,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:27:44,902 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:27:44,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-03 04:27:47,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 04:27:47,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:27:47,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-03 04:27:47,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:47,165 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 8 treesize of output 7 [2021-11-03 04:27:47,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-03 04:27:50,977 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 160 proven. 110 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-03 04:27:50,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:55,107 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 160 proven. 110 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-03 04:27:55,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963413670] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:27:55,110 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:27:55,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21, 17, 16, 19, 17] total 83 [2021-11-03 04:27:55,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947951677] [2021-11-03 04:27:55,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-11-03 04:27:55,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:27:55,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-11-03 04:27:55,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=520, Invalid=6286, Unknown=0, NotChecked=0, Total=6806 [2021-11-03 04:27:55,117 INFO L87 Difference]: Start difference. First operand 239 states and 277 transitions. Second operand has 83 states, 83 states have (on average 4.0120481927710845) internal successors, (333), 83 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:19,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:29:19,734 INFO L93 Difference]: Finished difference Result 490 states and 559 transitions. [2021-11-03 04:29:19,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-03 04:29:19,737 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 4.0120481927710845) internal successors, (333), 83 states have internal predecessors, (333), 0 states have call successors, (0), 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 88 [2021-11-03 04:29:19,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:29:19,739 INFO L225 Difference]: With dead ends: 490 [2021-11-03 04:29:19,740 INFO L226 Difference]: Without dead ends: 418 [2021-11-03 04:29:19,746 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 440 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3393 ImplicationChecksByTransitivity, 80.5s TimeCoverageRelationStatistics Valid=1799, Invalid=13453, Unknown=0, NotChecked=0, Total=15252 [2021-11-03 04:29:19,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-11-03 04:29:19,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 254. [2021-11-03 04:29:19,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 252 states have (on average 1.1626984126984128) internal successors, (293), 253 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:19,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 293 transitions. [2021-11-03 04:29:19,756 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 293 transitions. Word has length 88 [2021-11-03 04:29:19,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:29:19,757 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 293 transitions. [2021-11-03 04:29:19,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 4.0120481927710845) internal successors, (333), 83 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:29:19,758 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 293 transitions. [2021-11-03 04:29:19,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-03 04:29:19,773 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:29:19,773 INFO L513 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 1, 1, 1, 1, 1] [2021-11-03 04:29:19,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-03 04:29:19,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2021-11-03 04:29:20,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-03 04:29:20,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:29:20,391 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-03 04:29:20,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:29:20,391 INFO L85 PathProgramCache]: Analyzing trace with hash 2084926986, now seen corresponding path program 4 times [2021-11-03 04:29:20,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:29:20,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [925811703] [2021-11-03 04:29:20,392 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 04:29:20,393 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:29:20,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:29:20,394 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:29:20,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-03 04:29:22,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 04:29:22,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:29:22,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-03 04:29:22,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:29:22,278 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 8 treesize of output 7 [2021-11-03 04:29:26,336 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:26,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:29:48,683 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:48,684 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:29:48,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [925811703] [2021-11-03 04:29:48,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [925811703] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:29:48,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1867383528] [2021-11-03 04:29:48,684 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 04:29:48,684 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:29:48,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:29:48,685 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:29:48,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-03 04:29:51,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 04:29:51,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:29:51,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-03 04:29:51,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:29:51,845 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 8 treesize of output 7 [2021-11-03 04:29:54,783 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:29:54,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:30:02,216 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:30:02,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1867383528] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:30:02,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312352612] [2021-11-03 04:30:02,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 04:30:02,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:30:02,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:30:02,217 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:30:02,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c71483e-4d78-48d1-a31b-881ae48b2f28/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-03 04:30:04,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 04:30:04,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:30:04,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-03 04:30:04,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:30:04,727 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 8 treesize of output 7 [2021-11-03 04:30:10,429 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:30:10,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:30:56,676 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:30:56,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312352612] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:30:56,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:30:56,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29, 29, 39, 39] total 112 [2021-11-03 04:30:56,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511511879] [2021-11-03 04:30:56,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2021-11-03 04:30:56,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:30:56,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2021-11-03 04:30:56,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3289, Invalid=9367, Unknown=0, NotChecked=0, Total=12656 [2021-11-03 04:30:56,683 INFO L87 Difference]: Start difference. First operand 254 states and 293 transitions. Second operand has 113 states, 112 states have (on average 2.982142857142857) internal successors, (334), 113 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:53,570 WARN L207 SmtUtils]: Spent 41.55 s on a formula simplification that was a NOOP. DAG size: 258 [2021-11-03 04:33:40,686 WARN L207 SmtUtils]: Spent 1.76 m on a formula simplification. DAG size of input: 254 DAG size of output: 254 [2021-11-03 04:34:50,142 WARN L207 SmtUtils]: Spent 42.53 s on a formula simplification that was a NOOP. DAG size: 248