./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test13_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test13_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-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 35bea36500fd584379ee75f7219d833c6e835c74616f49a2cc8d9d16168e8f4f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:56:46,282 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:56:46,285 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:56:46,334 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:56:46,335 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:56:46,337 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:56:46,339 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:56:46,342 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:56:46,345 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:56:46,347 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:56:46,348 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:56:46,350 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:56:46,351 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:56:46,353 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:56:46,355 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:56:46,357 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:56:46,359 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:56:46,360 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:56:46,363 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:56:46,367 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:56:46,369 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:56:46,372 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:56:46,373 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:56:46,375 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:56:46,380 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:56:46,380 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:56:46,381 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:56:46,382 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:56:46,383 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:56:46,385 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:56:46,385 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:56:46,387 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:56:46,388 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:56:46,390 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:56:46,391 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:56:46,392 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:56:46,393 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:56:46,394 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:56:46,394 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:56:46,395 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:56:46,396 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:56:46,398 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-07 01:56:46,434 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:56:46,437 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:56:46,439 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:56:46,447 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:56:46,447 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:56:46,448 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:56:46,448 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:56:46,448 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:56:46,449 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:56:46,449 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:56:46,450 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:56:46,451 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:56:46,451 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:56:46,451 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:56:46,452 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:56:46,452 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 01:56:46,453 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 01:56:46,453 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:56:46,453 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:56:46,454 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 01:56:46,454 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:56:46,454 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:56:46,455 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:56:46,455 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 01:56:46,455 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 01:56:46,455 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 01:56:46,457 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:56:46,458 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:56:46,458 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:56:46,458 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:56:46,459 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:56:46,459 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:56:46,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:56:46,460 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:56:46,460 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:56:46,460 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:56:46,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:56:46,461 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:56:46,461 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:56:46,461 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_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 35bea36500fd584379ee75f7219d833c6e835c74616f49a2cc8d9d16168e8f4f [2021-11-07 01:56:46,866 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:56:46,891 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:56:46,894 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:56:46,896 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:56:46,897 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:56:46,898 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-memsafety/memleaks_test13_2.i [2021-11-07 01:56:46,977 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/data/408800218/360390e1b4054580b74d2cdb1be2fa31/FLAG14a9a1421 [2021-11-07 01:56:47,774 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:56:47,775 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/sv-benchmarks/c/ldv-memsafety/memleaks_test13_2.i [2021-11-07 01:56:47,808 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/data/408800218/360390e1b4054580b74d2cdb1be2fa31/FLAG14a9a1421 [2021-11-07 01:56:47,965 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/data/408800218/360390e1b4054580b74d2cdb1be2fa31 [2021-11-07 01:56:47,969 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:56:47,974 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:56:47,979 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:56:47,979 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:56:47,984 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:56:47,986 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:56:47" (1/1) ... [2021-11-07 01:56:47,987 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57bfd2bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:56:47, skipping insertion in model container [2021-11-07 01:56:47,988 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:56:47" (1/1) ... [2021-11-07 01:56:47,998 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:56:48,073 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:56:48,683 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:56:48,719 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:56:48,720 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@374b779e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:56:48, skipping insertion in model container [2021-11-07 01:56:48,720 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:56:48,720 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:56:48,724 INFO L168 Benchmark]: Toolchain (without parser) took 747.96 ms. Allocated memory is still 102.8 MB. Free memory was 59.9 MB in the beginning and 72.3 MB in the end (delta: -12.4 MB). Peak memory consumption was 6.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:56:48,725 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 102.8 MB. Free memory is still 77.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:56:48,728 INFO L168 Benchmark]: CACSL2BoogieTranslator took 741.78 ms. Allocated memory is still 102.8 MB. Free memory was 59.7 MB in the beginning and 72.3 MB in the end (delta: -12.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:56:48,731 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 102.8 MB. Free memory is still 77.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 741.78 ms. Allocated memory is still 102.8 MB. Free memory was 59.7 MB in the beginning and 72.3 MB in the end (delta: -12.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: 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_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test13_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-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 35bea36500fd584379ee75f7219d833c6e835c74616f49a2cc8d9d16168e8f4f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:56:51,484 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:56:51,488 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:56:51,566 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:56:51,567 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:56:51,572 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:56:51,575 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:56:51,580 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:56:51,585 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:56:51,594 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:56:51,597 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:56:51,599 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:56:51,600 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:56:51,603 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:56:51,605 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:56:51,611 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:56:51,613 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:56:51,614 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:56:51,617 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:56:51,626 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:56:51,629 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:56:51,631 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:56:51,635 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:56:51,637 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:56:51,648 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:56:51,649 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:56:51,650 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:56:51,652 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:56:51,653 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:56:51,654 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:56:51,655 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:56:51,656 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:56:51,658 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:56:51,659 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:56:51,661 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:56:51,662 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:56:51,663 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:56:51,663 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:56:51,663 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:56:51,666 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:56:51,666 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:56:51,673 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-07 01:56:51,727 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:56:51,727 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:56:51,729 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:56:51,729 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:56:51,730 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:56:51,730 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:56:51,730 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:56:51,731 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:56:51,731 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:56:51,733 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 01:56:51,734 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 01:56:51,735 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:56:51,735 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:56:51,735 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 01:56:51,736 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:56:51,736 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:56:51,736 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:56:51,736 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 01:56:51,737 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 01:56:51,737 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 01:56:51,737 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:56:51,738 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:56:51,738 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:56:51,738 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:56:51,738 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:56:51,739 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:56:51,739 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:56:51,739 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:56:51,740 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:56:51,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:56:51,740 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:56:51,740 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:56:51,741 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:56:51,742 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:56:51,742 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:56:51,742 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:56:51,742 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_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 35bea36500fd584379ee75f7219d833c6e835c74616f49a2cc8d9d16168e8f4f [2021-11-07 01:56:52,243 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:56:52,277 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:56:52,282 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:56:52,283 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:56:52,284 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:56:52,286 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-memsafety/memleaks_test13_2.i [2021-11-07 01:56:52,362 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/data/894643509/9e30379b5f3245b2a1ffa2a78cdd8872/FLAG11f056b62 [2021-11-07 01:56:53,081 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:56:53,082 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/sv-benchmarks/c/ldv-memsafety/memleaks_test13_2.i [2021-11-07 01:56:53,111 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/data/894643509/9e30379b5f3245b2a1ffa2a78cdd8872/FLAG11f056b62 [2021-11-07 01:56:53,282 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/data/894643509/9e30379b5f3245b2a1ffa2a78cdd8872 [2021-11-07 01:56:53,285 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:56:53,286 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:56:53,288 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:56:53,289 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:56:53,293 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:56:53,294 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:56:53" (1/1) ... [2021-11-07 01:56:53,296 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c613d93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:56:53, skipping insertion in model container [2021-11-07 01:56:53,296 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:56:53" (1/1) ... [2021-11-07 01:56:53,305 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:56:53,382 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:56:53,903 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:56:53,924 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:56:53,935 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:56:53,990 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:56:53,999 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:56:54,063 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:56:54,118 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:56:54,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:56:54 WrapperNode [2021-11-07 01:56:54,119 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:56:54,120 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:56:54,120 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:56:54,121 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:56:54,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:56:54" (1/1) ... [2021-11-07 01:56:54,159 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:56:54" (1/1) ... [2021-11-07 01:56:54,189 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:56:54,190 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:56:54,190 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:56:54,190 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:56:54,201 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:56:54" (1/1) ... [2021-11-07 01:56:54,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:56:54" (1/1) ... [2021-11-07 01:56:54,206 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:56:54" (1/1) ... [2021-11-07 01:56:54,207 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:56:54" (1/1) ... [2021-11-07 01:56:54,219 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:56:54" (1/1) ... [2021-11-07 01:56:54,224 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:56:54" (1/1) ... [2021-11-07 01:56:54,227 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:56:54" (1/1) ... [2021-11-07 01:56:54,231 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:56:54,232 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:56:54,233 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:56:54,233 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:56:54,234 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:56:54" (1/1) ... [2021-11-07 01:56:54,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:56:54,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:56:54,272 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:56:54,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:56:54,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:56:54,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 01:56:54,327 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:56:54,327 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 01:56:54,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 01:56:54,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:56:54,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:56:55,061 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:56:55,062 INFO L299 CfgBuilder]: Removed 23 assume(true) statements. [2021-11-07 01:56:55,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:56:55 BoogieIcfgContainer [2021-11-07 01:56:55,065 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:56:55,067 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:56:55,068 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:56:55,071 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:56:55,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:56:53" (1/3) ... [2021-11-07 01:56:55,073 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@676679a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:56:55, skipping insertion in model container [2021-11-07 01:56:55,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:56:54" (2/3) ... [2021-11-07 01:56:55,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@676679a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:56:55, skipping insertion in model container [2021-11-07 01:56:55,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:56:55" (3/3) ... [2021-11-07 01:56:55,076 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test13_2.i [2021-11-07 01:56:55,083 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:56:55,083 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 29 error locations. [2021-11-07 01:56:55,140 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:56:55,148 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:56:55,148 INFO L340 AbstractCegarLoop]: Starting to check reachability of 29 error locations. [2021-11-07 01:56:55,167 INFO L276 IsEmpty]: Start isEmpty. Operand has 62 states, 32 states have (on average 2.03125) internal successors, (65), 61 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:55,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 01:56:55,175 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:56:55,175 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 01:56:55,176 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-07 01:56:55,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:56:55,183 INFO L85 PathProgramCache]: Analyzing trace with hash 889508713, now seen corresponding path program 1 times [2021-11-07 01:56:55,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:56:55,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [97175962] [2021-11-07 01:56:55,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:55,208 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:56:55,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:56:55,220 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:56:55,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:56:55,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:55,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:56:55,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:55,546 INFO L354 Elim1Store]: treesize reduction 34, result has 38.2 percent of original size [2021-11-07 01:56:55,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 26 [2021-11-07 01:56:55,744 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-07 01:56:55,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 19 [2021-11-07 01:56:55,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:56:55,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:55,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:56:55,884 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:55,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [97175962] [2021-11-07 01:56:55,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [97175962] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:56:55,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:56:55,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:56:55,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243845064] [2021-11-07 01:56:55,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:56:55,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:56:55,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:56:55,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:56:55,915 INFO L87 Difference]: Start difference. First operand has 62 states, 32 states have (on average 2.03125) internal successors, (65), 61 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 2.0) 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) [2021-11-07 01:56:56,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:56:56,253 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2021-11-07 01:56:56,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:56:56,255 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) 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 [2021-11-07 01:56:56,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:56:56,266 INFO L225 Difference]: With dead ends: 99 [2021-11-07 01:56:56,266 INFO L226 Difference]: Without dead ends: 95 [2021-11-07 01:56:56,267 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:56:56,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-07 01:56:56,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 58. [2021-11-07 01:56:56,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 31 states have (on average 1.935483870967742) internal successors, (60), 57 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:56,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2021-11-07 01:56:56,321 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 6 [2021-11-07 01:56:56,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:56:56,322 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2021-11-07 01:56:56,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) 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) [2021-11-07 01:56:56,323 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2021-11-07 01:56:56,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 01:56:56,324 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:56:56,325 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 01:56:56,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:56,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:56:56,540 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-07 01:56:56,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:56:56,548 INFO L85 PathProgramCache]: Analyzing trace with hash 889508714, now seen corresponding path program 1 times [2021-11-07 01:56:56,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:56:56,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [441857727] [2021-11-07 01:56:56,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:56,554 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:56:56,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:56:56,558 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:56:56,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:56:56,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:56,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:56:56,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:56,761 INFO L354 Elim1Store]: treesize reduction 34, result has 38.2 percent of original size [2021-11-07 01:56:56,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 35 [2021-11-07 01:56:56,792 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 01:56:56,793 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 1 case distinctions, treesize of input 35 treesize of output 36 [2021-11-07 01:56:57,205 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-07 01:56:57,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 55 [2021-11-07 01:56:57,286 INFO L354 Elim1Store]: treesize reduction 18, result has 63.3 percent of original size [2021-11-07 01:56:57,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 66 [2021-11-07 01:56:57,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:56:57,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:59,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:56:59,938 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:59,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [441857727] [2021-11-07 01:56:59,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [441857727] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:56:59,938 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:56:59,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-11-07 01:56:59,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716059002] [2021-11-07 01:56:59,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:56:59,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:56:59,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:56:59,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=37, Unknown=1, NotChecked=0, Total=56 [2021-11-07 01:56:59,942 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:00,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:00,611 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2021-11-07 01:57:00,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:57:00,612 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-07 01:57:00,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:00,614 INFO L225 Difference]: With dead ends: 92 [2021-11-07 01:57:00,614 INFO L226 Difference]: Without dead ends: 92 [2021-11-07 01:57:00,615 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=26, Invalid=45, Unknown=1, NotChecked=0, Total=72 [2021-11-07 01:57:00,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-07 01:57:00,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 56. [2021-11-07 01:57:00,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 55 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:00,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2021-11-07 01:57:00,623 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 6 [2021-11-07 01:57:00,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:00,624 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2021-11-07 01:57:00,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:00,624 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2021-11-07 01:57:00,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 01:57:00,625 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:00,625 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:00,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:00,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:00,838 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-07 01:57:00,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:00,839 INFO L85 PathProgramCache]: Analyzing trace with hash 119380842, now seen corresponding path program 1 times [2021-11-07 01:57:00,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:00,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [723213151] [2021-11-07 01:57:00,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:00,840 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:00,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:00,842 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:00,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:57:00,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:00,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:57:00,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:01,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-11-07 01:57:01,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:01,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:01,151 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-11-07 01:57:01,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-11-07 01:57:01,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:01,194 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:01,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [723213151] [2021-11-07 01:57:01,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [723213151] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:01,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:01,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:57:01,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924952478] [2021-11-07 01:57:01,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:57:01,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:01,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:57:01,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:57:01,197 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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) [2021-11-07 01:57:01,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:01,831 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2021-11-07 01:57:01,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:57:01,832 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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 [2021-11-07 01:57:01,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:01,834 INFO L225 Difference]: With dead ends: 111 [2021-11-07 01:57:01,834 INFO L226 Difference]: Without dead ends: 111 [2021-11-07 01:57:01,835 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:57:01,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-07 01:57:01,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 55. [2021-11-07 01:57:01,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 54 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) [2021-11-07 01:57:01,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2021-11-07 01:57:01,843 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 8 [2021-11-07 01:57:01,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:01,843 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2021-11-07 01:57:01,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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) [2021-11-07 01:57:01,844 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2021-11-07 01:57:01,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 01:57:01,845 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:01,845 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:01,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:02,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:02,052 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-07 01:57:02,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:02,053 INFO L85 PathProgramCache]: Analyzing trace with hash 119380843, now seen corresponding path program 1 times [2021-11-07 01:57:02,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:02,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [147698910] [2021-11-07 01:57:02,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:02,055 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:02,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:02,056 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:02,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:57:02,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:02,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 01:57:02,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:02,272 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 01:57:02,273 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 1 case distinctions, treesize of input 22 treesize of output 23 [2021-11-07 01:57:02,369 INFO L354 Elim1Store]: treesize reduction 34, result has 38.2 percent of original size [2021-11-07 01:57:02,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 36 [2021-11-07 01:57:02,758 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-07 01:57:02,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 56 [2021-11-07 01:57:02,838 INFO L354 Elim1Store]: treesize reduction 18, result has 63.3 percent of original size [2021-11-07 01:57:02,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 67 [2021-11-07 01:57:03,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-11-07 01:57:03,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-11-07 01:57:03,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:03,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:04,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:04,054 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:04,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [147698910] [2021-11-07 01:57:04,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [147698910] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:04,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:04,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 10 [2021-11-07 01:57:04,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553406965] [2021-11-07 01:57:04,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:57:04,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:04,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:57:04,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:57:04,058 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:08,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:08,893 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2021-11-07 01:57:08,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:57:08,894 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-07 01:57:08,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:08,895 INFO L225 Difference]: With dead ends: 110 [2021-11-07 01:57:08,896 INFO L226 Difference]: Without dead ends: 110 [2021-11-07 01:57:08,896 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-11-07 01:57:08,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-07 01:57:08,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 54. [2021-11-07 01:57:08,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 53 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:08,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2021-11-07 01:57:08,903 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 8 [2021-11-07 01:57:08,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:08,904 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2021-11-07 01:57:08,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:08,904 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2021-11-07 01:57:08,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 01:57:08,905 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:08,905 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:08,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:09,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:09,106 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-07 01:57:09,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:09,107 INFO L85 PathProgramCache]: Analyzing trace with hash -574091939, now seen corresponding path program 1 times [2021-11-07 01:57:09,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:09,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [191704202] [2021-11-07 01:57:09,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:09,108 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:09,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:09,110 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:09,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:57:09,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:09,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:57:09,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:09,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:09,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:09,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:09,322 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:09,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [191704202] [2021-11-07 01:57:09,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [191704202] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:09,323 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:09,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:57:09,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180501455] [2021-11-07 01:57:09,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:57:09,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:09,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:57:09,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:57:09,325 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:09,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:09,360 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2021-11-07 01:57:09,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:57:09,361 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-11-07 01:57:09,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:09,363 INFO L225 Difference]: With dead ends: 105 [2021-11-07 01:57:09,363 INFO L226 Difference]: Without dead ends: 105 [2021-11-07 01:57:09,363 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:57:09,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-07 01:57:09,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 56. [2021-11-07 01:57:09,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 55 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:09,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2021-11-07 01:57:09,371 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 9 [2021-11-07 01:57:09,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:09,371 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2021-11-07 01:57:09,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:09,372 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2021-11-07 01:57:09,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 01:57:09,373 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:09,373 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:09,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:09,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:09,587 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-07 01:57:09,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:09,588 INFO L85 PathProgramCache]: Analyzing trace with hash -594161204, now seen corresponding path program 1 times [2021-11-07 01:57:09,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:09,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1657372016] [2021-11-07 01:57:09,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:09,589 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:09,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:09,590 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:09,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:57:09,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:09,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:57:09,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:09,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:57:09,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:09,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:09,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:09,909 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:09,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1657372016] [2021-11-07 01:57:09,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1657372016] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:09,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:09,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:57:09,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654606214] [2021-11-07 01:57:09,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:57:09,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:09,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:57:09,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:57:09,912 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:10,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:10,531 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2021-11-07 01:57:10,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:57:10,532 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-11-07 01:57:10,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:10,533 INFO L225 Difference]: With dead ends: 138 [2021-11-07 01:57:10,533 INFO L226 Difference]: Without dead ends: 138 [2021-11-07 01:57:10,534 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:57:10,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-07 01:57:10,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 59. [2021-11-07 01:57:10,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 58 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:10,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2021-11-07 01:57:10,543 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 9 [2021-11-07 01:57:10,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:10,544 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2021-11-07 01:57:10,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:10,544 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2021-11-07 01:57:10,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 01:57:10,545 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:10,545 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:10,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:10,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:10,756 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-07 01:57:10,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:10,757 INFO L85 PathProgramCache]: Analyzing trace with hash -594161203, now seen corresponding path program 1 times [2021-11-07 01:57:10,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:10,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [164106043] [2021-11-07 01:57:10,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:10,771 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:10,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:10,779 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:10,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:57:10,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:10,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 01:57:10,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:10,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:57:11,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:11,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:11,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:11,486 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:11,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [164106043] [2021-11-07 01:57:11,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [164106043] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:11,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:11,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-07 01:57:11,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380474778] [2021-11-07 01:57:11,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:57:11,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:11,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:57:11,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:57:11,489 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 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) [2021-11-07 01:57:12,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:12,950 INFO L93 Difference]: Finished difference Result 136 states and 138 transitions. [2021-11-07 01:57:12,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:57:12,952 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 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 9 [2021-11-07 01:57:12,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:12,954 INFO L225 Difference]: With dead ends: 136 [2021-11-07 01:57:12,954 INFO L226 Difference]: Without dead ends: 136 [2021-11-07 01:57:12,955 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:57:12,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-07 01:57:12,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 60. [2021-11-07 01:57:12,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.631578947368421) internal successors, (62), 59 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:12,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2021-11-07 01:57:12,960 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 9 [2021-11-07 01:57:12,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:12,961 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2021-11-07 01:57:12,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 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) [2021-11-07 01:57:12,961 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2021-11-07 01:57:12,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 01:57:12,962 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:12,962 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:12,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:13,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:13,179 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-07 01:57:13,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:13,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1200915423, now seen corresponding path program 1 times [2021-11-07 01:57:13,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:13,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [88707796] [2021-11-07 01:57:13,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:13,180 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:13,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:13,181 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:13,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:57:13,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:13,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:57:13,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:13,383 INFO L354 Elim1Store]: treesize reduction 34, result has 38.2 percent of original size [2021-11-07 01:57:13,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 26 [2021-11-07 01:57:13,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-11-07 01:57:13,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:13,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:13,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:13,662 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:13,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [88707796] [2021-11-07 01:57:13,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [88707796] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:13,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:13,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:57:13,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245930680] [2021-11-07 01:57:13,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:57:13,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:13,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:57:13,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:57:13,663 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:14,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:14,204 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2021-11-07 01:57:14,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:57:14,205 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-07 01:57:14,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:14,206 INFO L225 Difference]: With dead ends: 111 [2021-11-07 01:57:14,206 INFO L226 Difference]: Without dead ends: 111 [2021-11-07 01:57:14,206 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:57:14,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-07 01:57:14,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 64. [2021-11-07 01:57:14,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 63 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:14,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2021-11-07 01:57:14,212 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 9 [2021-11-07 01:57:14,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:14,212 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2021-11-07 01:57:14,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:14,213 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2021-11-07 01:57:14,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 01:57:14,213 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:14,214 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:14,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:14,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:14,414 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-07 01:57:14,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:14,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1200915424, now seen corresponding path program 1 times [2021-11-07 01:57:14,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:14,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [279445912] [2021-11-07 01:57:14,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:14,416 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:14,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:14,417 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:14,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:57:14,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:14,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 01:57:14,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:14,582 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 01:57:14,582 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 1 case distinctions, treesize of input 9 treesize of output 11 [2021-11-07 01:57:14,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-11-07 01:57:14,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-11-07 01:57:14,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:14,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:15,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:15,218 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:15,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [279445912] [2021-11-07 01:57:15,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [279445912] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:15,218 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:15,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-11-07 01:57:15,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977688598] [2021-11-07 01:57:15,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:57:15,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:15,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:57:15,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:57:15,220 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2021-11-07 01:57:16,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:16,289 INFO L93 Difference]: Finished difference Result 115 states and 117 transitions. [2021-11-07 01:57:16,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:57:16,291 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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 9 [2021-11-07 01:57:16,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:16,292 INFO L225 Difference]: With dead ends: 115 [2021-11-07 01:57:16,293 INFO L226 Difference]: Without dead ends: 115 [2021-11-07 01:57:16,293 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:57:16,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-07 01:57:16,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 64. [2021-11-07 01:57:16,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 42 states have (on average 1.5714285714285714) internal successors, (66), 63 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:16,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2021-11-07 01:57:16,299 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 9 [2021-11-07 01:57:16,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:16,300 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2021-11-07 01:57:16,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2021-11-07 01:57:16,300 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2021-11-07 01:57:16,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 01:57:16,301 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:16,301 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:16,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:16,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:16,515 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-07 01:57:16,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:16,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1180846158, now seen corresponding path program 1 times [2021-11-07 01:57:16,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:16,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [117640025] [2021-11-07 01:57:16,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:16,516 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:16,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:16,517 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:16,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:57:16,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:16,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:57:16,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:16,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:16,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:16,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:16,793 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:16,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [117640025] [2021-11-07 01:57:16,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [117640025] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:16,793 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:16,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:57:16,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110661214] [2021-11-07 01:57:16,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:57:16,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:16,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:57:16,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:57:16,795 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:16,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:16,832 INFO L93 Difference]: Finished difference Result 86 states and 87 transitions. [2021-11-07 01:57:16,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:57:16,833 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-11-07 01:57:16,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:16,833 INFO L225 Difference]: With dead ends: 86 [2021-11-07 01:57:16,834 INFO L226 Difference]: Without dead ends: 86 [2021-11-07 01:57:16,834 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:57:16,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-07 01:57:16,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 56. [2021-11-07 01:57:16,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 55 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) [2021-11-07 01:57:16,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2021-11-07 01:57:16,838 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 9 [2021-11-07 01:57:16,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:16,838 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2021-11-07 01:57:16,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:16,838 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2021-11-07 01:57:16,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 01:57:16,839 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:16,839 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:16,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:17,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:17,052 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-07 01:57:17,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:17,052 INFO L85 PathProgramCache]: Analyzing trace with hash 241733103, now seen corresponding path program 1 times [2021-11-07 01:57:17,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:17,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1377443061] [2021-11-07 01:57:17,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:17,053 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:17,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:17,054 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:17,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:57:17,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:17,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:57:17,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:17,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:17,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:17,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:17,403 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:17,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1377443061] [2021-11-07 01:57:17,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1377443061] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:17,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:17,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:57:17,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077441890] [2021-11-07 01:57:17,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:57:17,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:17,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:57:17,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:57:17,413 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:17,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:17,657 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2021-11-07 01:57:17,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:57:17,658 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-07 01:57:17,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:17,659 INFO L225 Difference]: With dead ends: 85 [2021-11-07 01:57:17,659 INFO L226 Difference]: Without dead ends: 85 [2021-11-07 01:57:17,660 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:57:17,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-07 01:57:17,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 55. [2021-11-07 01:57:17,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 54 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:17,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2021-11-07 01:57:17,663 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 11 [2021-11-07 01:57:17,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:17,664 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2021-11-07 01:57:17,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:17,664 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2021-11-07 01:57:17,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 01:57:17,665 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:17,665 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:17,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:17,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:17,866 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-07 01:57:17,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:17,866 INFO L85 PathProgramCache]: Analyzing trace with hash 241733104, now seen corresponding path program 1 times [2021-11-07 01:57:17,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:17,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1732333750] [2021-11-07 01:57:17,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:17,867 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:17,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:17,869 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:17,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:57:18,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:18,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:57:18,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:18,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:18,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:18,401 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 8 treesize of output 6 [2021-11-07 01:57:18,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:18,513 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:18,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1732333750] [2021-11-07 01:57:18,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1732333750] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:18,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:18,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 8 [2021-11-07 01:57:18,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104640278] [2021-11-07 01:57:18,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:57:18,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:18,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:57:18,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:57:18,515 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 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) [2021-11-07 01:57:19,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:19,137 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2021-11-07 01:57:19,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:57:19,138 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 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 11 [2021-11-07 01:57:19,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:19,139 INFO L225 Difference]: With dead ends: 84 [2021-11-07 01:57:19,139 INFO L226 Difference]: Without dead ends: 84 [2021-11-07 01:57:19,140 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:57:19,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-07 01:57:19,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 54. [2021-11-07 01:57:19,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 53 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:19,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2021-11-07 01:57:19,143 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 11 [2021-11-07 01:57:19,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:19,144 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2021-11-07 01:57:19,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 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) [2021-11-07 01:57:19,144 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2021-11-07 01:57:19,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 01:57:19,145 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:19,145 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:19,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:19,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:19,364 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-07 01:57:19,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:19,365 INFO L85 PathProgramCache]: Analyzing trace with hash -606195921, now seen corresponding path program 1 times [2021-11-07 01:57:19,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:19,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1165269318] [2021-11-07 01:57:19,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:19,366 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:19,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:19,367 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:19,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:57:19,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:19,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:57:19,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:19,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-07 01:57:19,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-07 01:57:19,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:19,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:20,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:20,007 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:20,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1165269318] [2021-11-07 01:57:20,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1165269318] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:20,007 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:20,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-07 01:57:20,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515028459] [2021-11-07 01:57:20,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:57:20,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:20,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:57:20,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:57:20,009 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:20,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:20,260 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2021-11-07 01:57:20,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:57:20,261 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-07 01:57:20,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:20,262 INFO L225 Difference]: With dead ends: 65 [2021-11-07 01:57:20,262 INFO L226 Difference]: Without dead ends: 65 [2021-11-07 01:57:20,262 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:57:20,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-07 01:57:20,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 56. [2021-11-07 01:57:20,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 39 states have (on average 1.4615384615384615) internal successors, (57), 55 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) [2021-11-07 01:57:20,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2021-11-07 01:57:20,265 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 12 [2021-11-07 01:57:20,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:20,266 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2021-11-07 01:57:20,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:20,266 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2021-11-07 01:57:20,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 01:57:20,267 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:20,267 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:20,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:20,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:20,476 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-07 01:57:20,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:20,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1612205465, now seen corresponding path program 1 times [2021-11-07 01:57:20,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:20,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [493057089] [2021-11-07 01:57:20,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:20,477 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:20,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:20,478 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:20,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:57:20,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:20,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:57:20,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:20,692 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 01:57:20,692 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 1 case distinctions, treesize of input 9 treesize of output 11 [2021-11-07 01:57:20,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:20,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:21,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:21,174 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:21,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [493057089] [2021-11-07 01:57:21,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [493057089] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:21,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:21,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-11-07 01:57:21,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928998166] [2021-11-07 01:57:21,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:57:21,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:21,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:57:21,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:57:21,176 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:21,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:21,714 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2021-11-07 01:57:21,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:57:21,716 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2021-11-07 01:57:21,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:21,716 INFO L225 Difference]: With dead ends: 62 [2021-11-07 01:57:21,716 INFO L226 Difference]: Without dead ends: 62 [2021-11-07 01:57:21,717 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:57:21,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-07 01:57:21,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2021-11-07 01:57:21,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 57 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:21,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2021-11-07 01:57:21,719 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 13 [2021-11-07 01:57:21,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:21,720 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2021-11-07 01:57:21,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:21,720 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2021-11-07 01:57:21,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 01:57:21,721 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:21,721 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:21,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:21,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:21,924 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-07 01:57:21,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:21,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1612205466, now seen corresponding path program 1 times [2021-11-07 01:57:21,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:21,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [528781060] [2021-11-07 01:57:21,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:21,925 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:21,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:21,926 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:21,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:57:22,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:22,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:57:22,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:22,239 INFO L354 Elim1Store]: treesize reduction 34, result has 38.2 percent of original size [2021-11-07 01:57:22,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 26 [2021-11-07 01:57:22,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:22,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:22,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:22,429 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:22,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [528781060] [2021-11-07 01:57:22,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [528781060] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:22,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:22,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:57:22,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945670774] [2021-11-07 01:57:22,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:57:22,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:22,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:57:22,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:57:22,431 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:22,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:22,624 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2021-11-07 01:57:22,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:57:22,625 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-07 01:57:22,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:22,626 INFO L225 Difference]: With dead ends: 56 [2021-11-07 01:57:22,626 INFO L226 Difference]: Without dead ends: 56 [2021-11-07 01:57:22,627 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:57:22,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-07 01:57:22,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-11-07 01:57:22,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 55 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) [2021-11-07 01:57:22,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2021-11-07 01:57:22,629 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 13 [2021-11-07 01:57:22,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:22,630 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2021-11-07 01:57:22,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:22,630 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2021-11-07 01:57:22,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 01:57:22,631 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:22,631 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:22,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:22,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:22,832 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-07 01:57:22,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:22,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1153742667, now seen corresponding path program 1 times [2021-11-07 01:57:22,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:22,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [354913010] [2021-11-07 01:57:22,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:22,833 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:22,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:22,834 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:22,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:57:23,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:23,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:57:23,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:23,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:23,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:23,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:23,241 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:23,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [354913010] [2021-11-07 01:57:23,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [354913010] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:23,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:23,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:57:23,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50435617] [2021-11-07 01:57:23,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:57:23,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:23,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:57:23,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:57:23,243 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:23,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:23,351 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2021-11-07 01:57:23,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:57:23,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-07 01:57:23,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:23,353 INFO L225 Difference]: With dead ends: 57 [2021-11-07 01:57:23,353 INFO L226 Difference]: Without dead ends: 45 [2021-11-07 01:57:23,353 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:57:23,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-07 01:57:23,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-11-07 01:57:23,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 44 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:23,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-11-07 01:57:23,355 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 15 [2021-11-07 01:57:23,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:23,355 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-11-07 01:57:23,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:23,355 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-11-07 01:57:23,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 01:57:23,356 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:23,356 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:23,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:23,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:23,560 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-07 01:57:23,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:23,560 INFO L85 PathProgramCache]: Analyzing trace with hash -440390413, now seen corresponding path program 1 times [2021-11-07 01:57:23,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:23,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [389360203] [2021-11-07 01:57:23,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:23,561 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:23,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:23,562 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:23,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:57:23,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:23,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 01:57:23,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:23,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:57:24,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-07 01:57:24,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-11-07 01:57:24,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:24,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:24,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2021-11-07 01:57:24,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:24,647 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:24,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [389360203] [2021-11-07 01:57:24,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [389360203] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:24,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:24,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2021-11-07 01:57:24,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682627597] [2021-11-07 01:57:24,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 01:57:24,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:24,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 01:57:24,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:57:24,649 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 11 states, 10 states have (on average 2.3) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:25,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:25,481 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2021-11-07 01:57:25,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 01:57:25,482 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-07 01:57:25,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:25,482 INFO L225 Difference]: With dead ends: 66 [2021-11-07 01:57:25,482 INFO L226 Difference]: Without dead ends: 66 [2021-11-07 01:57:25,483 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2021-11-07 01:57:25,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-07 01:57:25,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 44. [2021-11-07 01:57:25,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 43 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:25,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2021-11-07 01:57:25,485 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 16 [2021-11-07 01:57:25,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:25,485 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2021-11-07 01:57:25,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:25,486 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2021-11-07 01:57:25,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 01:57:25,486 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:25,486 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:25,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:25,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:25,687 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-07 01:57:25,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:25,688 INFO L85 PathProgramCache]: Analyzing trace with hash -440390412, now seen corresponding path program 1 times [2021-11-07 01:57:25,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:25,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1430782843] [2021-11-07 01:57:25,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:25,688 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:25,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:25,689 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:25,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:57:25,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:25,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-07 01:57:25,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:26,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:57:26,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-07 01:57:26,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-07 01:57:26,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-11-07 01:57:26,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-11-07 01:57:26,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:26,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:26,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-11-07 01:57:26,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:57:26,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:57:26,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:57:26,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:57:27,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:27,674 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:27,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1430782843] [2021-11-07 01:57:27,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1430782843] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:27,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:27,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 17 [2021-11-07 01:57:27,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054289308] [2021-11-07 01:57:27,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 01:57:27,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:27,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 01:57:27,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-11-07 01:57:27,678 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:29,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:29,545 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2021-11-07 01:57:29,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:57:29,547 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-07 01:57:29,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:29,547 INFO L225 Difference]: With dead ends: 65 [2021-11-07 01:57:29,547 INFO L226 Difference]: Without dead ends: 65 [2021-11-07 01:57:29,548 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2021-11-07 01:57:29,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-07 01:57:29,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 43. [2021-11-07 01:57:29,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 42 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) [2021-11-07 01:57:29,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2021-11-07 01:57:29,551 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 16 [2021-11-07 01:57:29,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:29,551 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2021-11-07 01:57:29,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:29,552 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2021-11-07 01:57:29,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-07 01:57:29,552 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:29,552 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:29,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:29,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:29,753 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-07 01:57:29,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:29,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1454308763, now seen corresponding path program 1 times [2021-11-07 01:57:29,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:29,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1083813642] [2021-11-07 01:57:29,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:29,754 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:29,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:29,755 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:29,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:57:30,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:30,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 01:57:30,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:30,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:57:30,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-07 01:57:30,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-11-07 01:57:30,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:30,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:30,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2021-11-07 01:57:30,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:30,973 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:30,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1083813642] [2021-11-07 01:57:30,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1083813642] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:30,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:30,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 11 [2021-11-07 01:57:30,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16826142] [2021-11-07 01:57:30,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:57:30,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:30,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:57:30,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:57:30,977 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:31,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:31,973 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2021-11-07 01:57:31,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:57:31,973 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2021-11-07 01:57:31,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:31,974 INFO L225 Difference]: With dead ends: 62 [2021-11-07 01:57:31,974 INFO L226 Difference]: Without dead ends: 62 [2021-11-07 01:57:31,975 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:57:31,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-07 01:57:31,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 44. [2021-11-07 01:57:31,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 33 states have (on average 1.393939393939394) internal successors, (46), 43 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:31,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-11-07 01:57:31,978 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 19 [2021-11-07 01:57:31,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:31,978 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-11-07 01:57:31,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:31,979 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-11-07 01:57:31,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-07 01:57:31,979 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:31,980 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:31,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:32,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:32,184 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-07 01:57:32,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:32,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1454308764, now seen corresponding path program 1 times [2021-11-07 01:57:32,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:32,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1143081982] [2021-11-07 01:57:32,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:32,185 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:32,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:32,186 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:32,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 01:57:32,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:32,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-07 01:57:32,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:32,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:57:32,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-07 01:57:32,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-07 01:57:32,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-11-07 01:57:32,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-11-07 01:57:33,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:33,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:33,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 56 [2021-11-07 01:57:33,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 82 [2021-11-07 01:57:33,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2021-11-07 01:57:34,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:34,687 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:34,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1143081982] [2021-11-07 01:57:34,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1143081982] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:34,688 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:34,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 19 [2021-11-07 01:57:34,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502958679] [2021-11-07 01:57:34,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 01:57:34,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:34,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 01:57:34,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:57:34,690 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 20 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) [2021-11-07 01:57:37,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:37,425 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2021-11-07 01:57:37,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 01:57:37,427 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 20 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) Word has length 19 [2021-11-07 01:57:37,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:37,428 INFO L225 Difference]: With dead ends: 71 [2021-11-07 01:57:37,428 INFO L226 Difference]: Without dead ends: 71 [2021-11-07 01:57:37,429 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2021-11-07 01:57:37,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-07 01:57:37,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 45. [2021-11-07 01:57:37,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:37,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-11-07 01:57:37,431 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 19 [2021-11-07 01:57:37,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:37,431 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-11-07 01:57:37,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 20 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) [2021-11-07 01:57:37,432 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-11-07 01:57:37,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-07 01:57:37,433 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:37,433 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:37,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:37,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:37,648 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-07 01:57:37,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:37,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1726316026, now seen corresponding path program 1 times [2021-11-07 01:57:37,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:37,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [934091529] [2021-11-07 01:57:37,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:37,650 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:37,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:37,652 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:37,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 01:57:38,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:38,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 01:57:38,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:38,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-07 01:57:38,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-07 01:57:38,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:38,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:38,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-07 01:57:38,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:38,686 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:38,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [934091529] [2021-11-07 01:57:38,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [934091529] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:38,686 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:38,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 17 [2021-11-07 01:57:38,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3303627] [2021-11-07 01:57:38,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 01:57:38,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:38,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 01:57:38,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-11-07 01:57:38,688 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:39,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:39,218 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2021-11-07 01:57:39,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 01:57:39,219 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 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 21 [2021-11-07 01:57:39,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:39,220 INFO L225 Difference]: With dead ends: 54 [2021-11-07 01:57:39,220 INFO L226 Difference]: Without dead ends: 54 [2021-11-07 01:57:39,220 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=163, Invalid=437, Unknown=0, NotChecked=0, Total=600 [2021-11-07 01:57:39,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-07 01:57:39,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 45. [2021-11-07 01:57:39,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 44 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:39,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-11-07 01:57:39,223 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 21 [2021-11-07 01:57:39,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:39,223 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-11-07 01:57:39,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:39,223 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-11-07 01:57:39,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 01:57:39,224 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:39,224 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:39,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:39,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:39,425 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-11-07 01:57:39,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:39,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1977268703, now seen corresponding path program 1 times [2021-11-07 01:57:39,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:39,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [7530413] [2021-11-07 01:57:39,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:39,426 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:39,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:39,427 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:39,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54ea0d-eebf-4aa2-b0d5-e466b0c5681e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 01:57:39,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:39,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-07 01:57:39,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:39,964 INFO L354 Elim1Store]: treesize reduction 34, result has 38.2 percent of original size [2021-11-07 01:57:39,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 26 [2021-11-07 01:57:40,049 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:57:40,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-07 01:57:40,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-07 01:57:40,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-07 01:57:40,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:57:40,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-07 01:57:40,679 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:57:40,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 46 [2021-11-07 01:57:40,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2021-11-07 01:57:40,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 54 [2021-11-07 01:57:41,331 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:57:41,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 27 [2021-11-07 01:57:41,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:57:41,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:41,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 102 [2021-11-07 01:58:03,247 WARN L207 SmtUtils]: Spent 10.52 s on a formula simplification. DAG size of input: 223 DAG size of output: 102 [2021-11-07 01:58:03,248 INFO L354 Elim1Store]: treesize reduction 569, result has 26.2 percent of original size [2021-11-07 01:58:03,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 38 case distinctions, treesize of input 90086 treesize of output 87723 [2021-11-07 01:58:07,723 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:58:07,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 66943 treesize of output 66989 [2021-11-07 01:58:09,115 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:58:09,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-11-07 01:59:32,331 WARN L207 SmtUtils]: Spent 5.44 s on a formula simplification. DAG size of input: 19 DAG size of output: 1 [2021-11-07 01:59:46,233 WARN L207 SmtUtils]: Spent 5.11 s on a formula simplification. DAG size of input: 19 DAG size of output: 1 [2021-11-07 02:01:47,794 WARN L207 SmtUtils]: Spent 5.43 s on a formula simplification. DAG size of input: 19 DAG size of output: 1 [2021-11-07 02:01:56,709 WARN L207 SmtUtils]: Spent 5.29 s on a formula simplification. DAG size of input: 19 DAG size of output: 1 [2021-11-07 02:02:05,072 WARN L207 SmtUtils]: Spent 5.06 s on a formula simplification. DAG size of input: 19 DAG size of output: 1 [2021-11-07 02:10:18,924 WARN L207 SmtUtils]: Spent 5.07 s on a formula simplification. DAG size of input: 19 DAG size of output: 1