./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-1.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_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/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_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/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_c4b65730-13fe-4409-ba0f-046ee70181fc/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 3012c2825f53c0db53d950c12df6540de859b34b2bef033c36a98846352dedd3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:11:07,437 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:11:07,441 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:11:07,490 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:11:07,491 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:11:07,492 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:11:07,494 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:11:07,497 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:11:07,499 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:11:07,500 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:11:07,503 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:11:07,505 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:11:07,506 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:11:07,509 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:11:07,511 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:11:07,515 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:11:07,519 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:11:07,526 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:11:07,528 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:11:07,531 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:11:07,534 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:11:07,539 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:11:07,540 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:11:07,541 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:11:07,545 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:11:07,545 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:11:07,546 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:11:07,547 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:11:07,547 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:11:07,548 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:11:07,549 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:11:07,550 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:11:07,551 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:11:07,552 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:11:07,553 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:11:07,553 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:11:07,554 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:11:07,555 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:11:07,555 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:11:07,556 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:11:07,557 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:11:07,558 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-07 01:11:07,581 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:11:07,582 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:11:07,584 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:11:07,590 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:11:07,591 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:11:07,591 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:11:07,591 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:11:07,591 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:11:07,591 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:11:07,592 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:11:07,593 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:11:07,593 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:11:07,593 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:11:07,594 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:11:07,594 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:11:07,594 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 01:11:07,595 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 01:11:07,595 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:11:07,595 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:11:07,595 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 01:11:07,596 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:11:07,596 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:11:07,596 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:11:07,596 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 01:11:07,596 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 01:11:07,597 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 01:11:07,598 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:11:07,599 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:11:07,599 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:11:07,599 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:11:07,599 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:11:07,600 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:11:07,600 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:11:07,600 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:11:07,600 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:11:07,601 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:11:07,601 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:11:07,601 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:11:07,601 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:11:07,601 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_c4b65730-13fe-4409-ba0f-046ee70181fc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3012c2825f53c0db53d950c12df6540de859b34b2bef033c36a98846352dedd3 [2021-11-07 01:11:07,862 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:11:07,888 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:11:07,891 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:11:07,893 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:11:07,894 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:11:07,895 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-1.i [2021-11-07 01:11:07,978 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/data/b60575054/fcbfc8c116d64470915df498c283cefc/FLAG846ba8615 [2021-11-07 01:11:08,635 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:11:08,637 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-1.i [2021-11-07 01:11:08,665 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/data/b60575054/fcbfc8c116d64470915df498c283cefc/FLAG846ba8615 [2021-11-07 01:11:08,826 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/data/b60575054/fcbfc8c116d64470915df498c283cefc [2021-11-07 01:11:08,828 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:11:08,830 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:11:08,843 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:11:08,843 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:11:08,846 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:11:08,847 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:11:08" (1/1) ... [2021-11-07 01:11:08,848 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e6cefd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:08, skipping insertion in model container [2021-11-07 01:11:08,848 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:11:08" (1/1) ... [2021-11-07 01:11:08,861 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:11:08,925 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:11:09,648 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-1.i[44118,44131] [2021-11-07 01:11:09,670 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-1.i[44660,44673] [2021-11-07 01:11:09,835 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-1.i[56247,56260] [2021-11-07 01:11:09,839 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-1.i[56368,56381] [2021-11-07 01:11:09,845 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:11:09,869 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 01:11:09,870 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1608773d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:09, skipping insertion in model container [2021-11-07 01:11:09,870 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:11:09,871 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:11:09,874 INFO L168 Benchmark]: Toolchain (without parser) took 1042.30 ms. Allocated memory is still 115.3 MB. Free memory was 77.2 MB in the beginning and 78.7 MB in the end (delta: -1.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 01:11:09,875 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 115.3 MB. Free memory was 89.4 MB in the beginning and 89.3 MB in the end (delta: 29.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:11:09,877 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1027.99 ms. Allocated memory is still 115.3 MB. Free memory was 76.9 MB in the beginning and 78.7 MB in the end (delta: -1.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 01:11:09,878 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 115.3 MB. Free memory was 89.4 MB in the beginning and 89.3 MB in the end (delta: 29.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1027.99 ms. Allocated memory is still 115.3 MB. Free memory was 76.9 MB in the beginning and 78.7 MB in the end (delta: -1.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 990]: 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_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/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_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/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_c4b65730-13fe-4409-ba0f-046ee70181fc/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 3012c2825f53c0db53d950c12df6540de859b34b2bef033c36a98846352dedd3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:11:12,195 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:11:12,198 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:11:12,229 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:11:12,230 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:11:12,231 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:11:12,233 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:11:12,235 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:11:12,238 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:11:12,239 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:11:12,240 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:11:12,242 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:11:12,246 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:11:12,253 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:11:12,255 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:11:12,258 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:11:12,260 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:11:12,261 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:11:12,267 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:11:12,273 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:11:12,279 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:11:12,281 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:11:12,282 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:11:12,285 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:11:12,289 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:11:12,290 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:11:12,291 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:11:12,293 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:11:12,296 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:11:12,298 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:11:12,299 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:11:12,300 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:11:12,302 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:11:12,303 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:11:12,304 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:11:12,305 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:11:12,306 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:11:12,306 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:11:12,306 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:11:12,308 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:11:12,309 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:11:12,310 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-07 01:11:12,355 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:11:12,355 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:11:12,356 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:11:12,357 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:11:12,357 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:11:12,357 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:11:12,357 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:11:12,358 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:11:12,358 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:11:12,359 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 01:11:12,360 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 01:11:12,361 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:11:12,361 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:11:12,361 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 01:11:12,361 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:11:12,362 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:11:12,362 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:11:12,362 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 01:11:12,362 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 01:11:12,363 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 01:11:12,363 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:11:12,363 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:11:12,363 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:11:12,363 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:11:12,364 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:11:12,364 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:11:12,364 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:11:12,364 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:11:12,365 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:11:12,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:11:12,365 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:11:12,365 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:11:12,366 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:11:12,366 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:11:12,366 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:11:12,366 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:11:12,367 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_c4b65730-13fe-4409-ba0f-046ee70181fc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3012c2825f53c0db53d950c12df6540de859b34b2bef033c36a98846352dedd3 [2021-11-07 01:11:12,741 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:11:12,764 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:11:12,767 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:11:12,768 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:11:12,769 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:11:12,770 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-1.i [2021-11-07 01:11:12,842 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/data/b255ac10f/feea4c3d41624916958aa07294b57b74/FLAGe6b06d6f5 [2021-11-07 01:11:13,632 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:11:13,632 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-1.i [2021-11-07 01:11:13,654 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/data/b255ac10f/feea4c3d41624916958aa07294b57b74/FLAGe6b06d6f5 [2021-11-07 01:11:13,830 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/data/b255ac10f/feea4c3d41624916958aa07294b57b74 [2021-11-07 01:11:13,833 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:11:13,834 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:11:13,836 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:11:13,836 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:11:13,840 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:11:13,840 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:11:13" (1/1) ... [2021-11-07 01:11:13,842 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@334bc9ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:13, skipping insertion in model container [2021-11-07 01:11:13,842 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:11:13" (1/1) ... [2021-11-07 01:11:13,849 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:11:13,904 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:11:14,554 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-1.i[44118,44131] [2021-11-07 01:11:14,577 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-1.i[44660,44673] [2021-11-07 01:11:14,728 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-1.i[56247,56260] [2021-11-07 01:11:14,729 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-1.i[56368,56381] [2021-11-07 01:11:14,737 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:11:14,750 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:11:14,779 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:11:14,801 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-1.i[44118,44131] [2021-11-07 01:11:14,803 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-1.i[44660,44673] [2021-11-07 01:11:14,905 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-1.i[56247,56260] [2021-11-07 01:11:14,906 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-1.i[56368,56381] [2021-11-07 01:11:14,910 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:11:14,916 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:11:14,946 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-1.i[44118,44131] [2021-11-07 01:11:14,948 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-1.i[44660,44673] [2021-11-07 01:11:15,058 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-1.i[56247,56260] [2021-11-07 01:11:15,064 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-1.i[56368,56381] [2021-11-07 01:11:15,067 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:11:15,160 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:11:15,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:15 WrapperNode [2021-11-07 01:11:15,161 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:11:15,162 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:11:15,163 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:11:15,163 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:11:15,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:15" (1/1) ... [2021-11-07 01:11:15,252 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:15" (1/1) ... [2021-11-07 01:11:15,354 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:11:15,355 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:11:15,355 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:11:15,356 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:11:15,365 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:15" (1/1) ... [2021-11-07 01:11:15,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:15" (1/1) ... [2021-11-07 01:11:15,386 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:15" (1/1) ... [2021-11-07 01:11:15,387 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:15" (1/1) ... [2021-11-07 01:11:15,445 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:15" (1/1) ... [2021-11-07 01:11:15,464 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:15" (1/1) ... [2021-11-07 01:11:15,469 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:15" (1/1) ... [2021-11-07 01:11:15,485 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:11:15,486 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:11:15,486 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:11:15,487 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:11:15,487 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:15" (1/1) ... [2021-11-07 01:11:15,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:11:15,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:11:15,532 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:11:15,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:11:15,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 01:11:15,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 01:11:15,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:11:15,581 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-07 01:11:15,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 01:11:15,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 01:11:15,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 01:11:15,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:11:15,601 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:11:15,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 01:11:15,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:11:15,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:11:21,156 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:11:21,156 INFO L299 CfgBuilder]: Removed 111 assume(true) statements. [2021-11-07 01:11:21,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:11:21 BoogieIcfgContainer [2021-11-07 01:11:21,160 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:11:21,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:11:21,162 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:11:21,168 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:11:21,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:11:13" (1/3) ... [2021-11-07 01:11:21,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1656b364 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:11:21, skipping insertion in model container [2021-11-07 01:11:21,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:15" (2/3) ... [2021-11-07 01:11:21,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1656b364 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:11:21, skipping insertion in model container [2021-11-07 01:11:21,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:11:21" (3/3) ... [2021-11-07 01:11:21,171 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_JEN_test6-1.i [2021-11-07 01:11:21,177 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:11:21,177 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 562 error locations. [2021-11-07 01:11:21,236 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:11:21,246 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 01:11:21,247 INFO L340 AbstractCegarLoop]: Starting to check reachability of 562 error locations. [2021-11-07 01:11:21,290 INFO L276 IsEmpty]: Start isEmpty. Operand has 1150 states, 587 states have (on average 2.192504258943782) internal successors, (1287), 1149 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states 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 01:11:21,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-07 01:11:21,296 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:21,297 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-07 01:11:21,298 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 558 more)] === [2021-11-07 01:11:21,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:21,310 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-11-07 01:11:21,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:21,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1806762844] [2021-11-07 01:11:21,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:21,323 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:21,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:21,325 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:21,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:11:21,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:21,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:11:21,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:21,606 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 01:11:21,633 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 01:11:21,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:21,666 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 01:11:21,666 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:21,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1806762844] [2021-11-07 01:11:21,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1806762844] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:21,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:21,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:11:21,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541974472] [2021-11-07 01:11:21,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:11:21,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:21,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:11:21,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:21,692 INFO L87 Difference]: Start difference. First operand has 1150 states, 587 states have (on average 2.192504258943782) internal successors, (1287), 1149 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:23,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:23,741 INFO L93 Difference]: Finished difference Result 1133 states and 1191 transitions. [2021-11-07 01:11:23,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:11:23,743 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-07 01:11:23,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:23,768 INFO L225 Difference]: With dead ends: 1133 [2021-11-07 01:11:23,768 INFO L226 Difference]: Without dead ends: 1131 [2021-11-07 01:11:23,769 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:23,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2021-11-07 01:11:23,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 1122. [2021-11-07 01:11:23,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 579 states have (on average 2.0397236614853194) internal successors, (1181), 1121 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states 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 01:11:23,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 1181 transitions. [2021-11-07 01:11:23,910 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 1181 transitions. Word has length 3 [2021-11-07 01:11:23,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:23,911 INFO L470 AbstractCegarLoop]: Abstraction has 1122 states and 1181 transitions. [2021-11-07 01:11:23,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:23,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 1181 transitions. [2021-11-07 01:11:23,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-07 01:11:23,912 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:23,912 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-07 01:11:23,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:24,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:24,124 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 558 more)] === [2021-11-07 01:11:24,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:24,125 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-11-07 01:11:24,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:24,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [122738926] [2021-11-07 01:11:24,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:24,126 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:24,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:24,127 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:24,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:11:24,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:24,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:11:24,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:24,293 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 01:11:24,311 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 01:11:24,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:24,376 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 01:11:24,376 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:24,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [122738926] [2021-11-07 01:11:24,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [122738926] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:24,379 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:24,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 01:11:24,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945330829] [2021-11-07 01:11:24,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:11:24,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:24,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:11:24,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:11:24,387 INFO L87 Difference]: Start difference. First operand 1122 states and 1181 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:29,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:29,644 INFO L93 Difference]: Finished difference Result 1626 states and 1717 transitions. [2021-11-07 01:11:29,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:11:29,645 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-07 01:11:29,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:29,654 INFO L225 Difference]: With dead ends: 1626 [2021-11-07 01:11:29,654 INFO L226 Difference]: Without dead ends: 1626 [2021-11-07 01:11:29,655 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:11:29,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1626 states. [2021-11-07 01:11:29,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1626 to 1158. [2021-11-07 01:11:29,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 624 states have (on average 2.0208333333333335) internal successors, (1261), 1157 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states 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 01:11:29,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 1261 transitions. [2021-11-07 01:11:29,697 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 1261 transitions. Word has length 3 [2021-11-07 01:11:29,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:29,698 INFO L470 AbstractCegarLoop]: Abstraction has 1158 states and 1261 transitions. [2021-11-07 01:11:29,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:29,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 1261 transitions. [2021-11-07 01:11:29,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 01:11:29,699 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:29,699 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:29,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-07 01:11:29,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:29,910 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 558 more)] === [2021-11-07 01:11:29,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:29,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1929648752, now seen corresponding path program 1 times [2021-11-07 01:11:29,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:29,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [141683791] [2021-11-07 01:11:29,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:29,913 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:29,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:29,915 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:29,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:11:30,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:30,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:11:30,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:30,079 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 01:11:30,119 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 01:11:30,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:30,154 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 01:11:30,155 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:30,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [141683791] [2021-11-07 01:11:30,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [141683791] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:30,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:30,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:11:30,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381688436] [2021-11-07 01:11:30,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:11:30,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:30,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:11:30,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:11:30,162 INFO L87 Difference]: Start difference. First operand 1158 states and 1261 transitions. Second operand has 4 states, 3 states have (on average 3.0) 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 01:11:32,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:32,774 INFO L93 Difference]: Finished difference Result 1520 states and 1648 transitions. [2021-11-07 01:11:32,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:11:32,775 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) 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 01:11:32,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:32,783 INFO L225 Difference]: With dead ends: 1520 [2021-11-07 01:11:32,784 INFO L226 Difference]: Without dead ends: 1520 [2021-11-07 01:11:32,784 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 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 01:11:32,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-11-07 01:11:32,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 1110. [2021-11-07 01:11:32,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1110 states, 624 states have (on average 1.939102564102564) internal successors, (1210), 1109 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states 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 01:11:32,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1110 states to 1110 states and 1210 transitions. [2021-11-07 01:11:32,813 INFO L78 Accepts]: Start accepts. Automaton has 1110 states and 1210 transitions. Word has length 9 [2021-11-07 01:11:32,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:32,813 INFO L470 AbstractCegarLoop]: Abstraction has 1110 states and 1210 transitions. [2021-11-07 01:11:32,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) 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 01:11:32,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1110 states and 1210 transitions. [2021-11-07 01:11:32,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 01:11:32,814 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:32,814 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:32,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:33,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:33,029 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 558 more)] === [2021-11-07 01:11:33,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:33,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1929648753, now seen corresponding path program 1 times [2021-11-07 01:11:33,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:33,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1388996099] [2021-11-07 01:11:33,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:33,031 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:33,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:33,032 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:33,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:11:33,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:33,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:11:33,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:33,209 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 01:11:33,273 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 01:11:33,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:33,427 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 01:11:33,428 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:33,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1388996099] [2021-11-07 01:11:33,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1388996099] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:33,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:33,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 01:11:33,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152552581] [2021-11-07 01:11:33,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:11:33,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:33,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:11:33,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:11:33,430 INFO L87 Difference]: Start difference. First operand 1110 states and 1210 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:40,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:40,385 INFO L93 Difference]: Finished difference Result 1585 states and 1677 transitions. [2021-11-07 01:11:40,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:11:40,385 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-07 01:11:40,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:40,393 INFO L225 Difference]: With dead ends: 1585 [2021-11-07 01:11:40,393 INFO L226 Difference]: Without dead ends: 1585 [2021-11-07 01:11:40,394 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 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 01:11:40,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1585 states. [2021-11-07 01:11:40,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1585 to 1100. [2021-11-07 01:11:40,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1100 states, 624 states have (on average 1.9182692307692308) internal successors, (1197), 1099 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states 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 01:11:40,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 1197 transitions. [2021-11-07 01:11:40,421 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 1197 transitions. Word has length 9 [2021-11-07 01:11:40,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:40,422 INFO L470 AbstractCegarLoop]: Abstraction has 1100 states and 1197 transitions. [2021-11-07 01:11:40,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:40,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 1197 transitions. [2021-11-07 01:11:40,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 01:11:40,423 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:40,423 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:40,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-07 01:11:40,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:40,637 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr555ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 558 more)] === [2021-11-07 01:11:40,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:40,637 INFO L85 PathProgramCache]: Analyzing trace with hash -2075071052, now seen corresponding path program 1 times [2021-11-07 01:11:40,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:40,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1931572869] [2021-11-07 01:11:40,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:40,638 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:40,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:40,640 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:40,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:11:40,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:40,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:11:40,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:40,877 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 01:11:40,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:40,963 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 01:11:40,964 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:40,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1931572869] [2021-11-07 01:11:40,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1931572869] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:40,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:40,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:11:40,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818580722] [2021-11-07 01:11:40,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:11:40,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:40,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:11:40,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:11:40,968 INFO L87 Difference]: Start difference. First operand 1100 states and 1197 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:41,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:41,752 INFO L93 Difference]: Finished difference Result 1584 states and 1713 transitions. [2021-11-07 01:11:41,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:11:41,753 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-07 01:11:41,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:41,762 INFO L225 Difference]: With dead ends: 1584 [2021-11-07 01:11:41,762 INFO L226 Difference]: Without dead ends: 1584 [2021-11-07 01:11:41,762 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:11:41,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1584 states. [2021-11-07 01:11:41,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1584 to 1338. [2021-11-07 01:11:41,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1338 states, 862 states have (on average 1.9129930394431554) internal successors, (1649), 1337 states have internal predecessors, (1649), 0 states have call successors, (0), 0 states 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 01:11:41,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 1649 transitions. [2021-11-07 01:11:41,813 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 1649 transitions. Word has length 11 [2021-11-07 01:11:41,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:41,813 INFO L470 AbstractCegarLoop]: Abstraction has 1338 states and 1649 transitions. [2021-11-07 01:11:41,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:41,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 1649 transitions. [2021-11-07 01:11:41,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 01:11:41,814 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:41,814 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:41,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:42,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:42,026 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr359REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 558 more)] === [2021-11-07 01:11:42,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:42,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1895000204, now seen corresponding path program 1 times [2021-11-07 01:11:42,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:42,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [172253398] [2021-11-07 01:11:42,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:42,028 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:42,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:42,028 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:42,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:11:42,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:42,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:11:42,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:42,208 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 01:11:42,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:42,235 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 01:11:42,236 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:42,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [172253398] [2021-11-07 01:11:42,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [172253398] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:42,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:42,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:11:42,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511566883] [2021-11-07 01:11:42,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:11:42,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:42,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:11:42,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:11:42,238 INFO L87 Difference]: Start difference. First operand 1338 states and 1649 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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 01:11:42,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:42,269 INFO L93 Difference]: Finished difference Result 1309 states and 1595 transitions. [2021-11-07 01:11:42,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:11:42,269 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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 13 [2021-11-07 01:11:42,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:42,275 INFO L225 Difference]: With dead ends: 1309 [2021-11-07 01:11:42,276 INFO L226 Difference]: Without dead ends: 1309 [2021-11-07 01:11:42,276 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:11:42,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1309 states. [2021-11-07 01:11:42,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1309 to 1278. [2021-11-07 01:11:42,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1278 states, 826 states have (on average 1.8922518159806296) internal successors, (1563), 1277 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states 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 01:11:42,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1278 states to 1278 states and 1563 transitions. [2021-11-07 01:11:42,307 INFO L78 Accepts]: Start accepts. Automaton has 1278 states and 1563 transitions. Word has length 13 [2021-11-07 01:11:42,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:42,308 INFO L470 AbstractCegarLoop]: Abstraction has 1278 states and 1563 transitions. [2021-11-07 01:11:42,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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 01:11:42,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1278 states and 1563 transitions. [2021-11-07 01:11:42,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 01:11:42,309 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:42,310 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:42,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:42,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:42,523 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr558ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 558 more)] === [2021-11-07 01:11:42,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:42,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1278447871, now seen corresponding path program 1 times [2021-11-07 01:11:42,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:42,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [475282317] [2021-11-07 01:11:42,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:42,525 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:42,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:42,526 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:42,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:11:42,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:42,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:11:42,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:42,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:11:42,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:11:42,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:11:42,812 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-07 01:11:42,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-07 01:11:42,884 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-07 01:11:42,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-11-07 01:11:42,918 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 01:11:42,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:42,988 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 01:11:42,988 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:42,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [475282317] [2021-11-07 01:11:42,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [475282317] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:42,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:42,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:11:42,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729393685] [2021-11-07 01:11:42,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:11:42,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:42,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:11:42,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:11:42,990 INFO L87 Difference]: Start difference. First operand 1278 states and 1563 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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 01:11:44,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:44,424 INFO L93 Difference]: Finished difference Result 1630 states and 1973 transitions. [2021-11-07 01:11:44,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:11:44,426 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-07 01:11:44,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:44,434 INFO L225 Difference]: With dead ends: 1630 [2021-11-07 01:11:44,434 INFO L226 Difference]: Without dead ends: 1630 [2021-11-07 01:11:44,435 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:11:44,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1630 states. [2021-11-07 01:11:44,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1630 to 1277. [2021-11-07 01:11:44,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1277 states, 825 states have (on average 1.892121212121212) internal successors, (1561), 1276 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states 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 01:11:44,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1277 states to 1277 states and 1561 transitions. [2021-11-07 01:11:44,464 INFO L78 Accepts]: Start accepts. Automaton has 1277 states and 1561 transitions. Word has length 13 [2021-11-07 01:11:44,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:44,465 INFO L470 AbstractCegarLoop]: Abstraction has 1277 states and 1561 transitions. [2021-11-07 01:11:44,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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 01:11:44,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1277 states and 1561 transitions. [2021-11-07 01:11:44,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-07 01:11:44,466 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:44,466 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 01:11:44,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:44,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:44,679 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 558 more)] === [2021-11-07 01:11:44,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:44,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1153072931, now seen corresponding path program 1 times [2021-11-07 01:11:44,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:44,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [639880914] [2021-11-07 01:11:44,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:44,680 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:44,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:44,682 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:44,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:11:44,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:44,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:11:44,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:44,916 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 01:11:44,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:44,958 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 01:11:44,959 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:44,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [639880914] [2021-11-07 01:11:44,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [639880914] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:44,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:44,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:11:44,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343309446] [2021-11-07 01:11:44,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:11:44,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:44,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:11:44,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:11:44,961 INFO L87 Difference]: Start difference. First operand 1277 states and 1561 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states 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 01:11:44,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:44,993 INFO L93 Difference]: Finished difference Result 1217 states and 1475 transitions. [2021-11-07 01:11:44,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:11:44,994 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 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 01:11:44,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:45,000 INFO L225 Difference]: With dead ends: 1217 [2021-11-07 01:11:45,000 INFO L226 Difference]: Without dead ends: 1217 [2021-11-07 01:11:45,000 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:11:45,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2021-11-07 01:11:45,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 1217. [2021-11-07 01:11:45,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1217 states, 789 states have (on average 1.8694550063371356) internal successors, (1475), 1216 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states 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 01:11:45,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1217 states to 1217 states and 1475 transitions. [2021-11-07 01:11:45,033 INFO L78 Accepts]: Start accepts. Automaton has 1217 states and 1475 transitions. Word has length 19 [2021-11-07 01:11:45,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:45,033 INFO L470 AbstractCegarLoop]: Abstraction has 1217 states and 1475 transitions. [2021-11-07 01:11:45,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states 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 01:11:45,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1217 states and 1475 transitions. [2021-11-07 01:11:45,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-07 01:11:45,035 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:45,035 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 01:11:45,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:45,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:45,248 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 558 more)] === [2021-11-07 01:11:45,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:45,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1529130, now seen corresponding path program 1 times [2021-11-07 01:11:45,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:45,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [208026297] [2021-11-07 01:11:45,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:45,249 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:45,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:45,250 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:45,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:11:45,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:45,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:11:45,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:45,509 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 01:11:45,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:45,561 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 01:11:45,562 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:45,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [208026297] [2021-11-07 01:11:45,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [208026297] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:45,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:45,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:11:45,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602302899] [2021-11-07 01:11:45,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:11:45,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:45,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:11:45,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:11:45,564 INFO L87 Difference]: Start difference. First operand 1217 states and 1475 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states 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 01:11:45,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:45,635 INFO L93 Difference]: Finished difference Result 1189 states and 1419 transitions. [2021-11-07 01:11:45,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:11:45,635 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 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 01:11:45,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:45,640 INFO L225 Difference]: With dead ends: 1189 [2021-11-07 01:11:45,640 INFO L226 Difference]: Without dead ends: 1189 [2021-11-07 01:11:45,640 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:11:45,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2021-11-07 01:11:45,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 1187. [2021-11-07 01:11:45,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1187 states, 773 states have (on average 1.833117723156533) internal successors, (1417), 1186 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states 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 01:11:45,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1187 states to 1187 states and 1417 transitions. [2021-11-07 01:11:45,665 INFO L78 Accepts]: Start accepts. Automaton has 1187 states and 1417 transitions. Word has length 21 [2021-11-07 01:11:45,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:45,666 INFO L470 AbstractCegarLoop]: Abstraction has 1187 states and 1417 transitions. [2021-11-07 01:11:45,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states 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 01:11:45,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1187 states and 1417 transitions. [2021-11-07 01:11:45,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 01:11:45,667 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:45,667 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:45,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:45,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:45,883 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 558 more)] === [2021-11-07 01:11:45,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:45,883 INFO L85 PathProgramCache]: Analyzing trace with hash 270814884, now seen corresponding path program 1 times [2021-11-07 01:11:45,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:45,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1911120717] [2021-11-07 01:11:45,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:45,884 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:45,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:45,884 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:45,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:11:46,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:46,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:11:46,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:46,082 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 01:11:46,233 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 01:11:46,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:46,390 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 01:11:46,390 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:46,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1911120717] [2021-11-07 01:11:46,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1911120717] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:46,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:46,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:11:46,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547464487] [2021-11-07 01:11:46,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:11:46,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:46,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:11:46,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:11:46,392 INFO L87 Difference]: Start difference. First operand 1187 states and 1417 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states 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 01:11:48,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:48,952 INFO L93 Difference]: Finished difference Result 1638 states and 1987 transitions. [2021-11-07 01:11:48,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:11:48,952 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-07 01:11:48,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:48,960 INFO L225 Difference]: With dead ends: 1638 [2021-11-07 01:11:48,960 INFO L226 Difference]: Without dead ends: 1638 [2021-11-07 01:11:48,960 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:11:48,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1638 states. [2021-11-07 01:11:48,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1638 to 1183. [2021-11-07 01:11:48,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 773 states have (on average 1.8227684346701165) internal successors, (1409), 1182 states have internal predecessors, (1409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:48,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 1409 transitions. [2021-11-07 01:11:48,986 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 1409 transitions. Word has length 35 [2021-11-07 01:11:48,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:48,986 INFO L470 AbstractCegarLoop]: Abstraction has 1183 states and 1409 transitions. [2021-11-07 01:11:48,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states 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 01:11:48,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 1409 transitions. [2021-11-07 01:11:48,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 01:11:48,988 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:48,988 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:49,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:49,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:49,200 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr53REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 558 more)] === [2021-11-07 01:11:49,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:49,201 INFO L85 PathProgramCache]: Analyzing trace with hash 270814885, now seen corresponding path program 1 times [2021-11-07 01:11:49,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:49,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2090831570] [2021-11-07 01:11:49,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:49,202 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:49,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:49,203 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:49,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:11:49,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:49,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:11:49,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:49,448 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 01:11:49,741 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 01:11:49,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:50,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:50,323 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:50,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2090831570] [2021-11-07 01:11:50,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2090831570] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:50,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:50,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-07 01:11:50,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529611013] [2021-11-07 01:11:50,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:11:50,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:50,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:11:50,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:11:50,326 INFO L87 Difference]: Start difference. First operand 1183 states and 1409 transitions. Second operand has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 8 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 01:11:58,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:58,569 INFO L93 Difference]: Finished difference Result 1772 states and 2119 transitions. [2021-11-07 01:11:58,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:11:58,570 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-07 01:11:58,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:58,579 INFO L225 Difference]: With dead ends: 1772 [2021-11-07 01:11:58,579 INFO L226 Difference]: Without dead ends: 1772 [2021-11-07 01:11:58,579 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:11:58,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1772 states. [2021-11-07 01:11:58,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1772 to 1179. [2021-11-07 01:11:58,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1179 states, 773 states have (on average 1.8124191461836998) internal successors, (1401), 1178 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states 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 01:11:58,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1179 states to 1179 states and 1401 transitions. [2021-11-07 01:11:58,604 INFO L78 Accepts]: Start accepts. Automaton has 1179 states and 1401 transitions. Word has length 35 [2021-11-07 01:11:58,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:58,604 INFO L470 AbstractCegarLoop]: Abstraction has 1179 states and 1401 transitions. [2021-11-07 01:11:58,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 8 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 01:11:58,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1179 states and 1401 transitions. [2021-11-07 01:11:58,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 01:11:58,606 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:58,606 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:58,620 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-07 01:11:58,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:58,819 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 558 more)] === [2021-11-07 01:11:58,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:58,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1615578914, now seen corresponding path program 1 times [2021-11-07 01:11:58,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:58,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2109884558] [2021-11-07 01:11:58,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:58,820 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:58,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:58,821 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:58,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:11:59,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:59,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:11:59,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:59,298 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 01:11:59,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:59,442 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 01:11:59,442 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:59,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2109884558] [2021-11-07 01:11:59,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2109884558] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:59,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:59,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:11:59,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262579079] [2021-11-07 01:11:59,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:11:59,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:59,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:11:59,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:11:59,444 INFO L87 Difference]: Start difference. First operand 1179 states and 1401 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:59,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:59,503 INFO L93 Difference]: Finished difference Result 1167 states and 1381 transitions. [2021-11-07 01:11:59,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:11:59,504 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-07 01:11:59,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:59,509 INFO L225 Difference]: With dead ends: 1167 [2021-11-07 01:11:59,509 INFO L226 Difference]: Without dead ends: 1167 [2021-11-07 01:11:59,510 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 102 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 01:11:59,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2021-11-07 01:11:59,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 1167. [2021-11-07 01:11:59,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 761 states have (on average 1.8147174770039423) internal successors, (1381), 1166 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states 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 01:11:59,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1381 transitions. [2021-11-07 01:11:59,549 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1381 transitions. Word has length 53 [2021-11-07 01:11:59,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:59,551 INFO L470 AbstractCegarLoop]: Abstraction has 1167 states and 1381 transitions. [2021-11-07 01:11:59,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:59,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1381 transitions. [2021-11-07 01:11:59,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 01:11:59,555 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:59,555 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:59,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:59,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:59,769 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 558 more)] === [2021-11-07 01:11:59,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:59,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1057136622, now seen corresponding path program 1 times [2021-11-07 01:11:59,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:59,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1996695279] [2021-11-07 01:11:59,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:59,771 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:59,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:59,772 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:59,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:12:00,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:00,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:12:00,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:00,363 INFO L354 Elim1Store]: treesize reduction 77, result has 29.4 percent of original size [2021-11-07 01:12:00,363 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 3 case distinctions, treesize of input 15 treesize of output 37 [2021-11-07 01:12:00,543 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-07 01:12:00,544 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 16 treesize of output 21 [2021-11-07 01:12:00,648 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-11-07 01:12:00,649 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 33 treesize of output 44 [2021-11-07 01:12:01,103 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 01:12:01,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:01,471 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 01:12:01,471 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:01,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1996695279] [2021-11-07 01:12:01,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1996695279] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:01,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:01,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 01:12:01,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458830708] [2021-11-07 01:12:01,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:12:01,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:01,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:12:01,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:12:01,474 INFO L87 Difference]: Start difference. First operand 1167 states and 1381 transitions. Second operand has 7 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:06,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:06,231 INFO L93 Difference]: Finished difference Result 2592 states and 3072 transitions. [2021-11-07 01:12:06,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:12:06,231 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-07 01:12:06,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:06,240 INFO L225 Difference]: With dead ends: 2592 [2021-11-07 01:12:06,240 INFO L226 Difference]: Without dead ends: 2592 [2021-11-07 01:12:06,241 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:12:06,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2592 states. [2021-11-07 01:12:06,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2592 to 1408. [2021-11-07 01:12:06,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1408 states, 1004 states have (on average 1.7778884462151394) internal successors, (1785), 1407 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states 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 01:12:06,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1408 states to 1408 states and 1785 transitions. [2021-11-07 01:12:06,268 INFO L78 Accepts]: Start accepts. Automaton has 1408 states and 1785 transitions. Word has length 61 [2021-11-07 01:12:06,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:06,268 INFO L470 AbstractCegarLoop]: Abstraction has 1408 states and 1785 transitions. [2021-11-07 01:12:06,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:06,269 INFO L276 IsEmpty]: Start isEmpty. Operand 1408 states and 1785 transitions. [2021-11-07 01:12:06,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 01:12:06,270 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:06,270 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:06,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-07 01:12:06,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:12:06,484 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 558 more)] === [2021-11-07 01:12:06,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:06,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1057136623, now seen corresponding path program 1 times [2021-11-07 01:12:06,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:06,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [321005749] [2021-11-07 01:12:06,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:06,486 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:06,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:06,487 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:06,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:12:06,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:06,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 01:12:06,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:06,986 INFO L354 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2021-11-07 01:12:06,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 42 [2021-11-07 01:12:07,045 INFO L354 Elim1Store]: treesize reduction 77, result has 29.4 percent of original size [2021-11-07 01:12:07,046 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 3 case distinctions, treesize of input 42 treesize of output 63 [2021-11-07 01:12:07,274 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-07 01:12:07,274 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 44 treesize of output 51 [2021-11-07 01:12:07,298 INFO L354 Elim1Store]: treesize reduction 2, result has 92.0 percent of original size [2021-11-07 01:12:07,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 64 [2021-11-07 01:12:07,653 INFO L354 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2021-11-07 01:12:07,653 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 17 treesize of output 30 [2021-11-07 01:12:13,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:12:13,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:15,839 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 01:12:15,839 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:15,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [321005749] [2021-11-07 01:12:15,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [321005749] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:15,840 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:15,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 9 [2021-11-07 01:12:15,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313348962] [2021-11-07 01:12:15,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 01:12:15,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:15,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 01:12:15,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:12:15,841 INFO L87 Difference]: Start difference. First operand 1408 states and 1785 transitions. Second operand has 11 states, 10 states have (on average 12.2) internal successors, (122), 10 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:49,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:49,632 INFO L93 Difference]: Finished difference Result 1418 states and 1796 transitions. [2021-11-07 01:12:49,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:12:49,633 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 12.2) internal successors, (122), 10 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-07 01:12:49,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:49,641 INFO L225 Difference]: With dead ends: 1418 [2021-11-07 01:12:49,641 INFO L226 Difference]: Without dead ends: 1418 [2021-11-07 01:12:49,641 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:12:49,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2021-11-07 01:12:49,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1412. [2021-11-07 01:12:49,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1008 states have (on average 1.7748015873015872) internal successors, (1789), 1411 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states 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 01:12:49,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 1789 transitions. [2021-11-07 01:12:49,667 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 1789 transitions. Word has length 61 [2021-11-07 01:12:49,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:49,667 INFO L470 AbstractCegarLoop]: Abstraction has 1412 states and 1789 transitions. [2021-11-07 01:12:49,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 12.2) internal successors, (122), 10 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:49,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 1789 transitions. [2021-11-07 01:12:49,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:12:49,668 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:49,668 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:49,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:12:49,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:12:49,884 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr72ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 558 more)] === [2021-11-07 01:12:49,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:49,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1137699215, now seen corresponding path program 1 times [2021-11-07 01:12:49,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:49,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1548073386] [2021-11-07 01:12:49,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:49,885 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:49,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:49,887 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:49,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:12:50,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:50,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:12:50,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:50,639 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 01:12:50,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:50,796 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 01:12:50,797 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:50,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1548073386] [2021-11-07 01:12:50,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1548073386] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:50,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:50,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:12:50,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130518222] [2021-11-07 01:12:50,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:12:50,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:50,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:12:50,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:12:50,799 INFO L87 Difference]: Start difference. First operand 1412 states and 1789 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 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 01:12:51,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:51,207 INFO L93 Difference]: Finished difference Result 4066 states and 5199 transitions. [2021-11-07 01:12:51,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:12:51,208 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 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) Word has length 65 [2021-11-07 01:12:51,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:51,224 INFO L225 Difference]: With dead ends: 4066 [2021-11-07 01:12:51,224 INFO L226 Difference]: Without dead ends: 4066 [2021-11-07 01:12:51,224 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:12:51,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4066 states. [2021-11-07 01:12:51,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4066 to 1410. [2021-11-07 01:12:51,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1410 states, 1007 states have (on average 1.7745779543197617) internal successors, (1787), 1409 states have internal predecessors, (1787), 0 states have call successors, (0), 0 states 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 01:12:51,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 1787 transitions. [2021-11-07 01:12:51,251 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 1787 transitions. Word has length 65 [2021-11-07 01:12:51,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:51,252 INFO L470 AbstractCegarLoop]: Abstraction has 1410 states and 1787 transitions. [2021-11-07 01:12:51,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 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 01:12:51,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 1787 transitions. [2021-11-07 01:12:51,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:12:51,253 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:51,253 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:51,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:12:51,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:12:51,467 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr74REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 558 more)] === [2021-11-07 01:12:51,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:51,468 INFO L85 PathProgramCache]: Analyzing trace with hash -908630116, now seen corresponding path program 1 times [2021-11-07 01:12:51,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:51,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1846415712] [2021-11-07 01:12:51,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:51,469 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:51,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:51,470 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:51,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:12:52,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:52,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:12:52,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:52,575 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 01:12:52,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:53,100 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 01:12:53,100 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:53,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1846415712] [2021-11-07 01:12:53,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1846415712] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:53,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:53,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:12:53,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966601907] [2021-11-07 01:12:53,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:12:53,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:53,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:12:53,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:12:53,102 INFO L87 Difference]: Start difference. First operand 1410 states and 1787 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 3 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 01:12:53,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:53,337 INFO L93 Difference]: Finished difference Result 3283 states and 4130 transitions. [2021-11-07 01:12:53,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:12:53,337 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 01:12:53,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:53,349 INFO L225 Difference]: With dead ends: 3283 [2021-11-07 01:12:53,349 INFO L226 Difference]: Without dead ends: 3283 [2021-11-07 01:12:53,350 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:12:53,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3283 states. [2021-11-07 01:12:53,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3283 to 1666. [2021-11-07 01:12:53,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1263 states have (on average 1.7806809184481394) internal successors, (2249), 1665 states have internal predecessors, (2249), 0 states have call successors, (0), 0 states 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 01:12:53,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 2249 transitions. [2021-11-07 01:12:53,404 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 2249 transitions. Word has length 66 [2021-11-07 01:12:53,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:53,404 INFO L470 AbstractCegarLoop]: Abstraction has 1666 states and 2249 transitions. [2021-11-07 01:12:53,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 3 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 01:12:53,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 2249 transitions. [2021-11-07 01:12:53,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:12:53,405 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:53,406 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:53,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:12:53,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:12:53,623 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr74REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 558 more)] === [2021-11-07 01:12:53,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:53,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1887851608, now seen corresponding path program 1 times [2021-11-07 01:12:53,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:53,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [863054162] [2021-11-07 01:12:53,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:53,624 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:53,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:53,625 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:53,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:12:54,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:54,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:12:54,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:54,318 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 01:12:54,343 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 01:12:56,019 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 01:12:56,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2021-11-07 01:12:56,049 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:12:56,049 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 21 treesize of output 21 [2021-11-07 01:12:56,117 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 01:12:56,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:13:01,449 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 01:13:01,449 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:13:01,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [863054162] [2021-11-07 01:13:01,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [863054162] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:13:01,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:13:01,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-07 01:13:01,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870212590] [2021-11-07 01:13:01,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:13:01,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:13:01,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:13:01,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:13:01,451 INFO L87 Difference]: Start difference. First operand 1666 states and 2249 transitions. Second operand has 8 states, 7 states have (on average 18.571428571428573) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states 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 01:13:10,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:13:10,254 INFO L93 Difference]: Finished difference Result 2076 states and 2757 transitions. [2021-11-07 01:13:10,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:13:10,255 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 18.571428571428573) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 01:13:10,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:13:10,260 INFO L225 Difference]: With dead ends: 2076 [2021-11-07 01:13:10,261 INFO L226 Difference]: Without dead ends: 2076 [2021-11-07 01:13:10,261 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:13:10,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2076 states. [2021-11-07 01:13:10,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2076 to 1627. [2021-11-07 01:13:10,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1627 states, 1263 states have (on average 1.7292161520190024) internal successors, (2184), 1626 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states 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 01:13:10,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1627 states to 1627 states and 2184 transitions. [2021-11-07 01:13:10,289 INFO L78 Accepts]: Start accepts. Automaton has 1627 states and 2184 transitions. Word has length 67 [2021-11-07 01:13:10,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:13:10,289 INFO L470 AbstractCegarLoop]: Abstraction has 1627 states and 2184 transitions. [2021-11-07 01:13:10,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 18.571428571428573) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states 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 01:13:10,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1627 states and 2184 transitions. [2021-11-07 01:13:10,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:13:10,289 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:13:10,290 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:13:10,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:13:10,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:13:10,495 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr79ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 558 more)] === [2021-11-07 01:13:10,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:13:10,495 INFO L85 PathProgramCache]: Analyzing trace with hash -322193671, now seen corresponding path program 1 times [2021-11-07 01:13:10,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:13:10,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1331077415] [2021-11-07 01:13:10,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:13:10,496 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:13:10,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:13:10,496 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:13:10,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:13:11,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:11,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:13:11,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:13:11,316 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 01:13:11,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-07 01:13:11,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-07 01:13:11,536 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 01:13:11,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:13:11,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:13:11,811 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:13:11,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1331077415] [2021-11-07 01:13:11,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1331077415] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:13:11,812 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:13:11,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-07 01:13:11,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033354788] [2021-11-07 01:13:11,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:13:11,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:13:11,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:13:11,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:13:11,813 INFO L87 Difference]: Start difference. First operand 1627 states and 2184 transitions. Second operand has 7 states, 6 states have (on average 12.166666666666666) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states 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 01:13:23,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:13:23,345 INFO L93 Difference]: Finished difference Result 2058 states and 2591 transitions. [2021-11-07 01:13:23,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 01:13:23,345 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.166666666666666) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 01:13:23,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:13:23,348 INFO L225 Difference]: With dead ends: 2058 [2021-11-07 01:13:23,348 INFO L226 Difference]: Without dead ends: 2058 [2021-11-07 01:13:23,349 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 137 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:13:23,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2058 states. [2021-11-07 01:13:23,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2058 to 1626. [2021-11-07 01:13:23,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1626 states, 1263 states have (on average 1.728424386381631) internal successors, (2183), 1625 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states 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 01:13:23,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1626 states to 1626 states and 2183 transitions. [2021-11-07 01:13:23,374 INFO L78 Accepts]: Start accepts. Automaton has 1626 states and 2183 transitions. Word has length 73 [2021-11-07 01:13:23,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:13:23,375 INFO L470 AbstractCegarLoop]: Abstraction has 1626 states and 2183 transitions. [2021-11-07 01:13:23,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.166666666666666) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states 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 01:13:23,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1626 states and 2183 transitions. [2021-11-07 01:13:23,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:13:23,376 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:13:23,376 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:13:23,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:13:23,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:13:23,591 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr80ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 558 more)] === [2021-11-07 01:13:23,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:13:23,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1398068850, now seen corresponding path program 1 times [2021-11-07 01:13:23,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:13:23,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [139253929] [2021-11-07 01:13:23,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:13:23,592 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:13:23,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:13:23,593 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:13:23,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:13:24,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:24,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 01:13:24,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:13:24,440 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 01:13:24,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-07 01:13:24,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 01:13:24,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-07 01:13:24,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-07 01:13:24,912 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 01:13:24,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:13:25,981 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 01:13:25,981 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:13:25,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [139253929] [2021-11-07 01:13:25,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [139253929] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:13:25,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:13:25,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 13 [2021-11-07 01:13:25,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036093405] [2021-11-07 01:13:25,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 01:13:25,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:13:25,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 01:13:25,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:13:25,986 INFO L87 Difference]: Start difference. First operand 1626 states and 2183 transitions. Second operand has 14 states, 13 states have (on average 6.846153846153846) internal successors, (89), 14 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:02,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:02,817 INFO L93 Difference]: Finished difference Result 3432 states and 4470 transitions. [2021-11-07 01:14:02,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 01:14:02,818 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 6.846153846153846) internal successors, (89), 14 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 01:14:02,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:02,825 INFO L225 Difference]: With dead ends: 3432 [2021-11-07 01:14:02,825 INFO L226 Difference]: Without dead ends: 3432 [2021-11-07 01:14:02,825 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2021-11-07 01:14:02,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3432 states. [2021-11-07 01:14:02,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3432 to 1625. [2021-11-07 01:14:02,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1625 states, 1263 states have (on average 1.7276326207442596) internal successors, (2182), 1624 states have internal predecessors, (2182), 0 states have call successors, (0), 0 states 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 01:14:02,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1625 states to 1625 states and 2182 transitions. [2021-11-07 01:14:02,858 INFO L78 Accepts]: Start accepts. Automaton has 1625 states and 2182 transitions. Word has length 74 [2021-11-07 01:14:02,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:02,859 INFO L470 AbstractCegarLoop]: Abstraction has 1625 states and 2182 transitions. [2021-11-07 01:14:02,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 6.846153846153846) internal successors, (89), 14 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:02,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1625 states and 2182 transitions. [2021-11-07 01:14:02,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:14:02,860 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:02,860 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:14:02,878 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-07 01:14:03,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:14:03,075 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr83REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 558 more)] === [2021-11-07 01:14:03,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:03,076 INFO L85 PathProgramCache]: Analyzing trace with hash -2080731706, now seen corresponding path program 1 times [2021-11-07 01:14:03,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:03,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2140763946] [2021-11-07 01:14:03,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:03,076 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:03,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:03,077 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:03,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 01:14:03,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:03,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:14:03,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:04,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:04,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:04,312 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 01:14:04,312 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:04,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2140763946] [2021-11-07 01:14:04,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2140763946] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:04,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:14:04,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:14:04,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444219131] [2021-11-07 01:14:04,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:14:04,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:04,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:14:04,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:14:04,314 INFO L87 Difference]: Start difference. First operand 1625 states and 2182 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 0 states have call successors, (0), 0 states 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 01:14:04,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:04,531 INFO L93 Difference]: Finished difference Result 2839 states and 3748 transitions. [2021-11-07 01:14:04,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:14:04,532 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 0 states have call successors, (0), 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 79 [2021-11-07 01:14:04,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:04,536 INFO L225 Difference]: With dead ends: 2839 [2021-11-07 01:14:04,536 INFO L226 Difference]: Without dead ends: 2839 [2021-11-07 01:14:04,537 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:14:04,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2839 states. [2021-11-07 01:14:04,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2839 to 1628. [2021-11-07 01:14:04,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1628 states, 1266 states have (on average 1.7259083728278042) internal successors, (2185), 1627 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states 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 01:14:04,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1628 states to 1628 states and 2185 transitions. [2021-11-07 01:14:04,559 INFO L78 Accepts]: Start accepts. Automaton has 1628 states and 2185 transitions. Word has length 79 [2021-11-07 01:14:04,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:04,560 INFO L470 AbstractCegarLoop]: Abstraction has 1628 states and 2185 transitions. [2021-11-07 01:14:04,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 0 states have call successors, (0), 0 states 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 01:14:04,560 INFO L276 IsEmpty]: Start isEmpty. Operand 1628 states and 2185 transitions. [2021-11-07 01:14:04,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 01:14:04,561 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:04,561 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:14:04,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:04,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:14:04,764 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr83REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 558 more)] === [2021-11-07 01:14:04,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:04,765 INFO L85 PathProgramCache]: Analyzing trace with hash -21710874, now seen corresponding path program 1 times [2021-11-07 01:14:04,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:04,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [68768214] [2021-11-07 01:14:04,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:04,765 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:04,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:04,766 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:04,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 01:14:05,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:05,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:14:05,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:05,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:05,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:06,237 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:06,237 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:06,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [68768214] [2021-11-07 01:14:06,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [68768214] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:14:06,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1933922292] [2021-11-07 01:14:06,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:06,238 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:14:06,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:14:06,239 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:14:06,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-07 01:14:07,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:07,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:14:07,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:07,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:07,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:07,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:07,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1933922292] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:14:07,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391049375] [2021-11-07 01:14:07,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:07,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:14:07,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:14:07,779 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:14:07,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-07 01:14:08,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:08,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:14:08,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:08,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:08,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:09,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:09,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391049375] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:14:09,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:14:09,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 13 [2021-11-07 01:14:09,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044475438] [2021-11-07 01:14:09,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 01:14:09,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:09,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 01:14:09,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:14:09,430 INFO L87 Difference]: Start difference. First operand 1628 states and 2185 transitions. Second operand has 13 states, 13 states have (on average 7.076923076923077) internal successors, (92), 13 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:11,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:11,418 INFO L93 Difference]: Finished difference Result 4069 states and 5330 transitions. [2021-11-07 01:14:11,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 01:14:11,419 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.076923076923077) internal successors, (92), 13 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-07 01:14:11,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:11,429 INFO L225 Difference]: With dead ends: 4069 [2021-11-07 01:14:11,429 INFO L226 Difference]: Without dead ends: 4069 [2021-11-07 01:14:11,430 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:14:11,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4069 states. [2021-11-07 01:14:11,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4069 to 1640. [2021-11-07 01:14:11,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1278 states have (on average 1.7222222222222223) internal successors, (2201), 1639 states have internal predecessors, (2201), 0 states have call successors, (0), 0 states 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 01:14:11,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 2201 transitions. [2021-11-07 01:14:11,498 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 2201 transitions. Word has length 81 [2021-11-07 01:14:11,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:11,499 INFO L470 AbstractCegarLoop]: Abstraction has 1640 states and 2201 transitions. [2021-11-07 01:14:11,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.076923076923077) internal successors, (92), 13 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:11,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 2201 transitions. [2021-11-07 01:14:11,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 01:14:11,500 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:11,501 INFO L513 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:14:11,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:11,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-07 01:14:11,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:12,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:14:12,119 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr83REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 558 more)] === [2021-11-07 01:14:12,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:12,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1830489050, now seen corresponding path program 2 times [2021-11-07 01:14:12,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:12,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2070030968] [2021-11-07 01:14:12,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:14:12,120 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:12,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:12,121 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:12,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 01:14:13,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:14:13,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:14:13,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 01:14:13,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:13,960 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:13,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:14,800 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:14,800 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:14,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2070030968] [2021-11-07 01:14:14,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2070030968] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:14:14,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1426924267] [2021-11-07 01:14:14,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:14:14,800 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:14:14,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:14:14,801 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:14:14,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-07 01:14:16,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:14:16,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:14:16,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 01:14:16,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:17,159 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:17,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:17,398 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:17,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1426924267] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:14:17,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585192690] [2021-11-07 01:14:17,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:14:17,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:14:17,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:14:17,407 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:14:17,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-07 01:14:54,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:14:54,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:14:54,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 01:14:54,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:55,077 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:14:55,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-11-07 01:14:55,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-07 01:14:55,982 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-07 01:14:55,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 26 [2021-11-07 01:14:57,265 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-07 01:14:57,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 38 [2021-11-07 01:14:57,599 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-07 01:14:57,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 38 [2021-11-07 01:14:59,344 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-07 01:14:59,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 38 [2021-11-07 01:15:01,628 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-07 01:15:01,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 38 [2021-11-07 01:15:04,095 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-07 01:15:04,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 48 [2021-11-07 01:15:04,929 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-07 01:15:04,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 27 [2021-11-07 01:15:05,075 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:15:05,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:15:27,741 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_#Ultimate.C_memset_#t~loopctr271| (_ BitVec 32)) (|v_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr271_66| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base| (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base|) (bvadd |ULTIMATE.start_#Ultimate.C_memset_#t~loopctr271| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) (_ bv0 32)) (bvadd |v_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr271_66| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) (_ bv0 32))) c_ULTIMATE.start_main_~user~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_main_~user~0.offset)))))))))))) (_ bv1 1)))) is different from false [2021-11-07 01:16:48,045 INFO L354 Elim1Store]: treesize reduction 5, result has 89.8 percent of original size [2021-11-07 01:16:48,046 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 72 treesize of output 71 [2021-11-07 01:17:26,641 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 10 times theorem prover too weak. 0 trivial. 6 not checked. [2021-11-07 01:17:26,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585192690] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:17:26,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:17:26,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 15] total 41 [2021-11-07 01:17:26,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656112955] [2021-11-07 01:17:26,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-07 01:17:26,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:17:26,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-07 01:17:26,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1323, Unknown=53, NotChecked=76, Total=1640 [2021-11-07 01:17:26,644 INFO L87 Difference]: Start difference. First operand 1640 states and 2201 transitions. Second operand has 41 states, 41 states have (on average 5.975609756097561) internal successors, (245), 41 states have internal predecessors, (245), 0 states have call successors, (0), 0 states 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 01:17:59,602 WARN L207 SmtUtils]: Spent 5.22 s on a formula simplification that was a NOOP. DAG size: 86 [2021-11-07 01:19:27,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:27,565 INFO L93 Difference]: Finished difference Result 4486 states and 5710 transitions. [2021-11-07 01:19:27,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-07 01:19:27,565 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 5.975609756097561) internal successors, (245), 41 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-07 01:19:27,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:27,574 INFO L225 Difference]: With dead ends: 4486 [2021-11-07 01:19:27,575 INFO L226 Difference]: Without dead ends: 4486 [2021-11-07 01:19:27,577 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 554 GetRequests, 463 SyntacticMatches, 6 SemanticMatches, 85 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2075 ImplicationChecksByTransitivity, 173.0s TimeCoverageRelationStatistics Valid=1456, Invalid=5801, Unknown=57, NotChecked=168, Total=7482 [2021-11-07 01:19:27,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4486 states. [2021-11-07 01:19:27,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4486 to 1651. [2021-11-07 01:19:27,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1290 states have (on average 1.7147286821705425) internal successors, (2212), 1650 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states 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 01:19:27,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 2212 transitions. [2021-11-07 01:19:27,608 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 2212 transitions. Word has length 85 [2021-11-07 01:19:27,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:27,608 INFO L470 AbstractCegarLoop]: Abstraction has 1651 states and 2212 transitions. [2021-11-07 01:19:27,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 5.975609756097561) internal successors, (245), 41 states have internal predecessors, (245), 0 states have call successors, (0), 0 states 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 01:19:27,609 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 2212 transitions. [2021-11-07 01:19:27,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-07 01:19:27,609 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:27,610 INFO L513 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:19:27,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-07 01:19:27,862 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-11-07 01:19:28,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-07 01:19:28,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:19:28,223 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr84REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 558 more)] === [2021-11-07 01:19:28,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:28,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1600982183, now seen corresponding path program 1 times [2021-11-07 01:19:28,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:19:28,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [883633623] [2021-11-07 01:19:28,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:28,224 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:19:28,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:19:28,225 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:19:28,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-07 01:19:29,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:29,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 01:19:29,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:19:30,806 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:30,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:19:32,938 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:32,938 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:19:32,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [883633623] [2021-11-07 01:19:32,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [883633623] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:19:32,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1059843432] [2021-11-07 01:19:32,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:32,939 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:19:32,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:19:32,940 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:19:32,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-07 01:19:34,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:34,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 01:19:34,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:19:34,804 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:34,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:19:35,199 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:35,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1059843432] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:19:35,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508822596] [2021-11-07 01:19:35,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:35,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:19:35,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:19:35,215 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:19:35,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-07 01:19:36,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:36,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 01:19:36,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:19:36,972 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:36,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:19:42,743 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:42,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508822596] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:19:42,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:19:42,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18, 18, 18, 18] total 49 [2021-11-07 01:19:42,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780146554] [2021-11-07 01:19:42,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-07 01:19:42,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:19:42,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-07 01:19:42,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=592, Invalid=1760, Unknown=0, NotChecked=0, Total=2352 [2021-11-07 01:19:42,747 INFO L87 Difference]: Start difference. First operand 1651 states and 2212 transitions. Second operand has 49 states, 49 states have (on average 2.6122448979591835) internal successors, (128), 49 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 01:20:24,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:24,924 INFO L93 Difference]: Finished difference Result 16846 states and 21736 transitions. [2021-11-07 01:20:24,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-11-07 01:20:24,936 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.6122448979591835) internal successors, (128), 49 states have internal predecessors, (128), 0 states have call successors, (0), 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 93 [2021-11-07 01:20:24,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:24,964 INFO L225 Difference]: With dead ends: 16846 [2021-11-07 01:20:24,965 INFO L226 Difference]: Without dead ends: 16846 [2021-11-07 01:20:24,969 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2958 ImplicationChecksByTransitivity, 26.6s TimeCoverageRelationStatistics Valid=3045, Invalid=8511, Unknown=0, NotChecked=0, Total=11556 [2021-11-07 01:20:24,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16846 states. [2021-11-07 01:20:25,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16846 to 1699. [2021-11-07 01:20:25,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1699 states, 1338 states have (on average 1.7055306427503736) internal successors, (2282), 1698 states have internal predecessors, (2282), 0 states have call successors, (0), 0 states 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 01:20:25,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 2282 transitions. [2021-11-07 01:20:25,138 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 2282 transitions. Word has length 93 [2021-11-07 01:20:25,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:25,139 INFO L470 AbstractCegarLoop]: Abstraction has 1699 states and 2282 transitions. [2021-11-07 01:20:25,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.6122448979591835) internal successors, (128), 49 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 01:20:25,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 2282 transitions. [2021-11-07 01:20:25,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-07 01:20:25,140 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:25,140 INFO L513 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:20:25,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-11-07 01:20:25,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:25,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:25,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:20:25,770 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr84REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 558 more)] === [2021-11-07 01:20:25,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:25,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1361330777, now seen corresponding path program 2 times [2021-11-07 01:20:25,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:25,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1014566605] [2021-11-07 01:20:25,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:20:25,771 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:25,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:25,772 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:25,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-07 01:20:27,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:20:27,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:20:27,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-07 01:20:27,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:31,699 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:31,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:37,075 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:37,076 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:37,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1014566605] [2021-11-07 01:20:37,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1014566605] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:20:37,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1156106125] [2021-11-07 01:20:37,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:20:37,076 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:20:37,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:20:37,077 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:20:37,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-07 01:20:39,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:20:39,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:20:39,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-07 01:20:39,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:40,010 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:40,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:40,426 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:40,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1156106125] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:20:40,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471361453] [2021-11-07 01:20:40,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:20:40,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:20:40,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:20:40,428 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:20:40,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b65730-13fe-4409-ba0f-046ee70181fc/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-07 01:21:10,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:21:10,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:21:10,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-07 01:21:10,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:11,847 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:21:11,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-11-07 01:21:11,871 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:21:12,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 01:21:12,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-07 01:21:13,839 INFO L354 Elim1Store]: treesize reduction 37, result has 19.6 percent of original size [2021-11-07 01:21:13,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 67 [2021-11-07 01:21:13,896 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-07 01:21:13,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 51 [2021-11-07 01:21:14,454 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-07 01:21:14,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-07 01:21:16,499 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 01:21:16,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-07 01:21:20,479 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-07 01:21:20,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-07 01:21:20,543 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 01:21:20,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-07 01:21:22,593 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-07 01:21:22,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-07 01:21:25,422 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 01:21:25,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-07 01:21:31,300 WARN L207 SmtUtils]: Spent 5.28 s on a formula simplification. DAG size of input: 20 DAG size of output: 9 [2021-11-07 01:21:31,300 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-07 01:21:31,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-07 01:21:32,884 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 01:21:32,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-07 01:21:33,600 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-07 01:21:33,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-07 01:21:33,680 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 01:21:33,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-07 01:21:39,398 WARN L207 SmtUtils]: Spent 5.00 s on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2021-11-07 01:21:39,399 INFO L354 Elim1Store]: treesize reduction 25, result has 34.2 percent of original size [2021-11-07 01:21:39,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 73 [2021-11-07 01:21:43,541 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 01:21:43,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-07 01:21:45,627 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-07 01:21:45,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-07 01:21:45,684 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 01:21:45,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-07 01:21:47,740 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-07 01:21:47,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-07 01:21:47,806 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 01:21:47,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-07 01:21:50,399 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-07 01:21:50,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-07 01:21:52,375 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 01:21:52,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-07 01:21:53,031 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-07 01:21:53,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-07 01:21:55,618 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 01:21:55,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-07 01:21:58,952 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-07 01:21:58,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-07 01:21:59,016 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 01:21:59,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-07 01:22:02,164 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-07 01:22:02,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-07 01:22:04,998 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 01:22:04,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-07 01:22:05,657 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-07 01:22:05,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-07 01:22:05,716 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 01:22:05,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-07 01:22:06,349 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-07 01:22:06,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-07 01:22:09,016 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 01:22:09,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-07 01:22:16,529 WARN L207 SmtUtils]: Spent 6.79 s on a formula simplification. DAG size of input: 20 DAG size of output: 9 [2021-11-07 01:22:16,530 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-07 01:22:16,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-07 01:22:16,586 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 01:22:16,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-07 01:22:18,878 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-07 01:22:18,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-07 01:22:18,944 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 01:22:18,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-07 01:22:19,617 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-07 01:22:19,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-07 01:22:19,681 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 01:22:19,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-07 01:22:20,370 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-07 01:22:20,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-07 01:22:20,432 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 01:22:20,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-07 01:22:21,247 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-07 01:22:21,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-07 01:22:22,765 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 01:22:22,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-07 01:22:23,428 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-07 01:22:23,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-07 01:22:23,490 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 01:22:23,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-07 01:22:24,240 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-07 01:22:24,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-07 01:22:24,296 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 01:22:24,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-07 01:22:24,973 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-07 01:22:24,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-07 01:22:29,046 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 01:22:29,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-07 01:22:29,686 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-07 01:22:29,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-07 01:22:29,753 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 01:22:29,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-07 01:22:30,394 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-07 01:22:30,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-07 01:22:30,452 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 01:22:30,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-07 01:22:31,068 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-07 01:22:31,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-07 01:22:32,766 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 01:22:32,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-07 01:22:37,607 INFO L354 Elim1Store]: treesize reduction 27, result has 28.9 percent of original size [2021-11-07 01:22:37,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 71 [2021-11-07 01:22:37,669 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 01:22:37,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-07 01:22:40,990 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-07 01:22:40,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-07 01:22:44,694 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 01:22:44,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-07 01:22:46,997 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-07 01:22:46,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-11-07 01:22:49,357 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 01:22:49,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2021-11-07 01:22:56,065 WARN L207 SmtUtils]: Spent 6.12 s on a formula simplification. DAG size of input: 38 DAG size of output: 18 [2021-11-07 01:22:56,065 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-07 01:22:56,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 115 treesize of output 78 [2021-11-07 01:22:58,284 INFO L354 Elim1Store]: treesize reduction 104, result has 19.4 percent of original size [2021-11-07 01:22:58,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 101 [2021-11-07 01:22:59,533 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-07 01:22:59,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 113 treesize of output 62 [2021-11-07 01:22:59,553 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-07 01:22:59,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 26 [2021-11-07 01:22:59,909 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 29 proven. 30 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2021-11-07 01:22:59,909 INFO L328 TraceCheckSpWp]: Computing backward predicates...