./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c2bb9f0c15e3c3296f863c26b4377b27546cf1c417a60e9663a6ff48eb617ef8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 03:42:09,531 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 03:42:09,534 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 03:42:09,587 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 03:42:09,587 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 03:42:09,591 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 03:42:09,593 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 03:42:09,597 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 03:42:09,600 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 03:42:09,605 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 03:42:09,606 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 03:42:09,608 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 03:42:09,609 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 03:42:09,611 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 03:42:09,613 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 03:42:09,617 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 03:42:09,619 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 03:42:09,620 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 03:42:09,622 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 03:42:09,630 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 03:42:09,632 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 03:42:09,633 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 03:42:09,636 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 03:42:09,637 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 03:42:09,646 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 03:42:09,646 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 03:42:09,646 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 03:42:09,648 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 03:42:09,649 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 03:42:09,650 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 03:42:09,651 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 03:42:09,652 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 03:42:09,653 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 03:42:09,655 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 03:42:09,656 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 03:42:09,657 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 03:42:09,657 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 03:42:09,658 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 03:42:09,658 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 03:42:09,659 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 03:42:09,660 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 03:42:09,660 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-03 03:42:09,703 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 03:42:09,703 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 03:42:09,705 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 03:42:09,705 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 03:42:09,705 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 03:42:09,705 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 03:42:09,706 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 03:42:09,706 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 03:42:09,706 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 03:42:09,706 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 03:42:09,707 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 03:42:09,708 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 03:42:09,708 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 03:42:09,708 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 03:42:09,708 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 03:42:09,709 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 03:42:09,709 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 03:42:09,710 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 03:42:09,710 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 03:42:09,710 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 03:42:09,710 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 03:42:09,711 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 03:42:09,711 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 03:42:09,711 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 03:42:09,711 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 03:42:09,712 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 03:42:09,712 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 03:42:09,712 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 03:42:09,712 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 03:42:09,712 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 03:42:09,713 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 03:42:09,713 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 03:42:09,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:42:09,714 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 03:42:09,714 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 03:42:09,714 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 03:42:09,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 03:42:09,715 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 03:42:09,715 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 03:42:09,715 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_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2bb9f0c15e3c3296f863c26b4377b27546cf1c417a60e9663a6ff48eb617ef8 [2021-11-03 03:42:09,973 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 03:42:09,993 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 03:42:09,995 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 03:42:09,996 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 03:42:09,997 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 03:42:09,998 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i [2021-11-03 03:42:10,066 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/data/7bf5db65f/ffe57be93b1340188603b8fc29d2a8b4/FLAGb56663bd6 [2021-11-03 03:42:10,740 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 03:42:10,741 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i [2021-11-03 03:42:10,763 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/data/7bf5db65f/ffe57be93b1340188603b8fc29d2a8b4/FLAGb56663bd6 [2021-11-03 03:42:10,966 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/data/7bf5db65f/ffe57be93b1340188603b8fc29d2a8b4 [2021-11-03 03:42:10,969 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 03:42:10,970 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 03:42:10,972 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 03:42:10,972 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 03:42:10,975 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 03:42:10,976 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:42:10" (1/1) ... [2021-11-03 03:42:10,977 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2adc820f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:10, skipping insertion in model container [2021-11-03 03:42:10,977 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:42:10" (1/1) ... [2021-11-03 03:42:10,984 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 03:42:11,045 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 03:42:11,445 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_d478d1af-5e66-44f5-861c-ab3a65c073c0/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i[33021,33034] [2021-11-03 03:42:11,537 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_d478d1af-5e66-44f5-861c-ab3a65c073c0/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i[44124,44137] [2021-11-03 03:42:11,539 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_d478d1af-5e66-44f5-861c-ab3a65c073c0/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i[44245,44258] [2021-11-03 03:42:11,546 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:42:11,562 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-03 03:42:11,562 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@128a703e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:11, skipping insertion in model container [2021-11-03 03:42:11,563 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 03:42:11,563 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 03:42:11,565 INFO L168 Benchmark]: Toolchain (without parser) took 593.83 ms. Allocated memory is still 100.7 MB. Free memory was 66.2 MB in the beginning and 64.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-03 03:42:11,566 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 100.7 MB. Free memory is still 55.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 03:42:11,566 INFO L168 Benchmark]: CACSL2BoogieTranslator took 591.28 ms. Allocated memory is still 100.7 MB. Free memory was 66.0 MB in the beginning and 64.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-03 03:42:11,576 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 100.7 MB. Free memory is still 55.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 591.28 ms. Allocated memory is still 100.7 MB. Free memory was 66.0 MB in the beginning and 64.6 MB in the end (delta: 1.4 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: 716]: 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_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c2bb9f0c15e3c3296f863c26b4377b27546cf1c417a60e9663a6ff48eb617ef8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 03:42:13,769 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 03:42:13,773 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 03:42:13,831 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 03:42:13,832 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 03:42:13,836 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 03:42:13,838 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 03:42:13,842 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 03:42:13,846 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 03:42:13,853 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 03:42:13,855 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 03:42:13,857 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 03:42:13,857 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 03:42:13,860 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 03:42:13,862 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 03:42:13,867 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 03:42:13,869 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 03:42:13,870 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 03:42:13,876 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 03:42:13,883 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 03:42:13,886 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 03:42:13,887 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 03:42:13,890 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 03:42:13,892 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 03:42:13,902 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 03:42:13,902 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 03:42:13,903 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 03:42:13,905 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 03:42:13,905 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 03:42:13,907 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 03:42:13,907 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 03:42:13,908 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 03:42:13,910 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 03:42:13,911 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 03:42:13,913 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 03:42:13,913 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 03:42:13,914 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 03:42:13,914 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 03:42:13,914 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 03:42:13,916 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 03:42:13,917 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 03:42:13,918 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-03 03:42:13,961 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 03:42:13,961 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 03:42:13,963 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 03:42:13,963 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 03:42:13,963 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 03:42:13,964 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 03:42:13,964 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 03:42:13,964 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 03:42:13,964 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 03:42:13,966 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 03:42:13,967 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 03:42:13,967 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 03:42:13,968 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 03:42:13,968 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 03:42:13,968 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 03:42:13,968 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 03:42:13,969 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 03:42:13,969 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 03:42:13,969 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 03:42:13,970 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 03:42:13,970 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 03:42:13,970 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 03:42:13,970 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 03:42:13,971 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 03:42:13,971 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 03:42:13,971 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 03:42:13,972 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 03:42:13,972 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 03:42:13,972 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 03:42:13,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:42:13,973 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 03:42:13,973 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 03:42:13,974 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 03:42:13,974 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 03:42:13,975 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 03:42:13,975 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 03:42:13,975 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_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2bb9f0c15e3c3296f863c26b4377b27546cf1c417a60e9663a6ff48eb617ef8 [2021-11-03 03:42:14,358 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 03:42:14,390 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 03:42:14,393 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 03:42:14,394 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 03:42:14,395 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 03:42:14,396 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i [2021-11-03 03:42:14,465 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/data/59b3b7ac6/216d452337984435a327d1f174591f45/FLAGa36de0475 [2021-11-03 03:42:15,146 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 03:42:15,146 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i [2021-11-03 03:42:15,168 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/data/59b3b7ac6/216d452337984435a327d1f174591f45/FLAGa36de0475 [2021-11-03 03:42:15,348 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/data/59b3b7ac6/216d452337984435a327d1f174591f45 [2021-11-03 03:42:15,350 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 03:42:15,351 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 03:42:15,353 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 03:42:15,353 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 03:42:15,365 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 03:42:15,366 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:42:15" (1/1) ... [2021-11-03 03:42:15,367 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c71fa6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:15, skipping insertion in model container [2021-11-03 03:42:15,367 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:42:15" (1/1) ... [2021-11-03 03:42:15,373 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 03:42:15,433 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 03:42:15,919 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_d478d1af-5e66-44f5-861c-ab3a65c073c0/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i[33021,33034] [2021-11-03 03:42:16,116 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_d478d1af-5e66-44f5-861c-ab3a65c073c0/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i[44124,44137] [2021-11-03 03:42:16,142 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_d478d1af-5e66-44f5-861c-ab3a65c073c0/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i[44245,44258] [2021-11-03 03:42:16,149 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:42:16,160 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 03:42:16,187 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 03:42:16,204 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_d478d1af-5e66-44f5-861c-ab3a65c073c0/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i[33021,33034] [2021-11-03 03:42:16,283 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_d478d1af-5e66-44f5-861c-ab3a65c073c0/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i[44124,44137] [2021-11-03 03:42:16,284 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_d478d1af-5e66-44f5-861c-ab3a65c073c0/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i[44245,44258] [2021-11-03 03:42:16,288 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:42:16,293 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 03:42:16,324 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_d478d1af-5e66-44f5-861c-ab3a65c073c0/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i[33021,33034] [2021-11-03 03:42:16,389 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_d478d1af-5e66-44f5-861c-ab3a65c073c0/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i[44124,44137] [2021-11-03 03:42:16,390 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_d478d1af-5e66-44f5-861c-ab3a65c073c0/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test7-1.i[44245,44258] [2021-11-03 03:42:16,393 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:42:16,470 INFO L208 MainTranslator]: Completed translation [2021-11-03 03:42:16,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:16 WrapperNode [2021-11-03 03:42:16,470 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 03:42:16,472 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 03:42:16,473 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 03:42:16,474 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 03:42:16,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:16" (1/1) ... [2021-11-03 03:42:16,541 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:16" (1/1) ... [2021-11-03 03:42:16,632 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 03:42:16,633 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 03:42:16,633 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 03:42:16,634 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 03:42:16,641 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:16" (1/1) ... [2021-11-03 03:42:16,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:16" (1/1) ... [2021-11-03 03:42:16,655 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:16" (1/1) ... [2021-11-03 03:42:16,656 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:16" (1/1) ... [2021-11-03 03:42:16,734 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:16" (1/1) ... [2021-11-03 03:42:16,749 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:16" (1/1) ... [2021-11-03 03:42:16,755 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:16" (1/1) ... [2021-11-03 03:42:16,765 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 03:42:16,766 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 03:42:16,766 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 03:42:16,766 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 03:42:16,767 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:16" (1/1) ... [2021-11-03 03:42:16,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:42:16,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:42:16,801 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 03:42:16,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 03:42:16,855 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-03 03:42:16,855 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 03:42:16,855 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 03:42:16,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 03:42:16,855 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 03:42:16,855 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-03 03:42:16,856 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 03:42:16,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 03:42:16,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 03:42:16,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 03:42:16,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 03:42:16,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 03:42:22,419 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 03:42:22,420 INFO L299 CfgBuilder]: Removed 73 assume(true) statements. [2021-11-03 03:42:22,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:42:22 BoogieIcfgContainer [2021-11-03 03:42:22,424 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 03:42:22,426 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 03:42:22,426 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 03:42:22,429 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 03:42:22,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:42:15" (1/3) ... [2021-11-03 03:42:22,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dc86c54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:42:22, skipping insertion in model container [2021-11-03 03:42:22,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:16" (2/3) ... [2021-11-03 03:42:22,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dc86c54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:42:22, skipping insertion in model container [2021-11-03 03:42:22,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:42:22" (3/3) ... [2021-11-03 03:42:22,432 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SFH_test7-1.i [2021-11-03 03:42:22,438 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 03:42:22,439 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 530 error locations. [2021-11-03 03:42:22,486 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 03:42:22,492 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 03:42:22,492 INFO L340 AbstractCegarLoop]: Starting to check reachability of 530 error locations. [2021-11-03 03:42:22,534 INFO L276 IsEmpty]: Start isEmpty. Operand has 1054 states, 523 states have (on average 2.2523900573613767) internal successors, (1178), 1053 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:22,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-03 03:42:22,547 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:22,548 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-03 03:42:22,548 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 03:42:22,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:22,560 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-11-03 03:42:22,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:42:22,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [236580246] [2021-11-03 03:42:22,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:22,571 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:42:22,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:42:22,572 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:42:22,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 03:42:22,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:22,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 03:42:22,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:42:22,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 03:42:22,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:22,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:42:22,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:22,903 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:42:22,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [236580246] [2021-11-03 03:42:22,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [236580246] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:22,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:22,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 03:42:22,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109425021] [2021-11-03 03:42:22,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:42:22,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:42:22,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:42:22,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:42:22,955 INFO L87 Difference]: Start difference. First operand has 1054 states, 523 states have (on average 2.2523900573613767) internal successors, (1178), 1053 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:25,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:25,071 INFO L93 Difference]: Finished difference Result 1045 states and 1100 transitions. [2021-11-03 03:42:25,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:42:25,072 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-03 03:42:25,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:25,099 INFO L225 Difference]: With dead ends: 1045 [2021-11-03 03:42:25,099 INFO L226 Difference]: Without dead ends: 1043 [2021-11-03 03:42:25,101 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:42:25,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2021-11-03 03:42:25,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 1035. [2021-11-03 03:42:25,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1035 states, 521 states have (on average 2.0940499040307103) internal successors, (1091), 1034 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:25,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1035 states to 1035 states and 1091 transitions. [2021-11-03 03:42:25,212 INFO L78 Accepts]: Start accepts. Automaton has 1035 states and 1091 transitions. Word has length 3 [2021-11-03 03:42:25,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:25,213 INFO L470 AbstractCegarLoop]: Abstraction has 1035 states and 1091 transitions. [2021-11-03 03:42:25,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:25,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1035 states and 1091 transitions. [2021-11-03 03:42:25,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-03 03:42:25,214 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:25,214 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-03 03:42:25,227 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-03 03:42:25,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:42:25,424 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 03:42:25,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:25,443 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-11-03 03:42:25,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:42:25,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [386603664] [2021-11-03 03:42:25,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:25,444 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:42:25,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:42:25,445 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:42:25,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 03:42:25,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:25,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:42:25,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:42:25,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 03:42:25,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:25,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:42:25,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:25,654 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:42:25,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [386603664] [2021-11-03 03:42:25,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [386603664] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:25,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:25,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 03:42:25,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838675510] [2021-11-03 03:42:25,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:42:25,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:42:25,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:42:25,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:42:25,658 INFO L87 Difference]: Start difference. First operand 1035 states and 1091 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:30,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:30,900 INFO L93 Difference]: Finished difference Result 1500 states and 1588 transitions. [2021-11-03 03:42:30,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:42:30,901 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-03 03:42:30,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:30,911 INFO L225 Difference]: With dead ends: 1500 [2021-11-03 03:42:30,912 INFO L226 Difference]: Without dead ends: 1500 [2021-11-03 03:42:30,912 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:42:30,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1500 states. [2021-11-03 03:42:30,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1500 to 1070. [2021-11-03 03:42:30,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1070 states, 565 states have (on average 2.0707964601769913) internal successors, (1170), 1069 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:30,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 1170 transitions. [2021-11-03 03:42:30,947 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 1170 transitions. Word has length 3 [2021-11-03 03:42:30,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:30,948 INFO L470 AbstractCegarLoop]: Abstraction has 1070 states and 1170 transitions. [2021-11-03 03:42:30,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:30,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 1170 transitions. [2021-11-03 03:42:30,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 03:42:30,949 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:30,949 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:42:30,976 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-03 03:42:31,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:42:31,161 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 03:42:31,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:31,162 INFO L85 PathProgramCache]: Analyzing trace with hash 62249618, now seen corresponding path program 1 times [2021-11-03 03:42:31,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:42:31,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [442353161] [2021-11-03 03:42:31,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:31,164 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:42:31,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:42:31,165 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:42:31,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 03:42:31,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:31,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 03:42:31,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:42:31,316 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 [2021-11-03 03:42:31,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:31,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:42:31,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:31,375 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:42:31,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [442353161] [2021-11-03 03:42:31,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [442353161] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:31,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:31,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 03:42:31,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439352492] [2021-11-03 03:42:31,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:42:31,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:42:31,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:42:31,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:42:31,387 INFO L87 Difference]: Start difference. First operand 1070 states and 1170 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:33,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:33,595 INFO L93 Difference]: Finished difference Result 1400 states and 1525 transitions. [2021-11-03 03:42:33,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:42:33,596 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-03 03:42:33,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:33,604 INFO L225 Difference]: With dead ends: 1400 [2021-11-03 03:42:33,605 INFO L226 Difference]: Without dead ends: 1400 [2021-11-03 03:42:33,605 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:42:33,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2021-11-03 03:42:33,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1023. [2021-11-03 03:42:33,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 565 states have (on average 1.9823008849557522) internal successors, (1120), 1022 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:33,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1120 transitions. [2021-11-03 03:42:33,634 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1120 transitions. Word has length 8 [2021-11-03 03:42:33,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:33,634 INFO L470 AbstractCegarLoop]: Abstraction has 1023 states and 1120 transitions. [2021-11-03 03:42:33,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:33,635 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1120 transitions. [2021-11-03 03:42:33,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 03:42:33,636 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:33,636 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:42:33,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-03 03:42:33,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:42:33,847 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 03:42:33,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:33,848 INFO L85 PathProgramCache]: Analyzing trace with hash 62249619, now seen corresponding path program 1 times [2021-11-03 03:42:33,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:42:33,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2121157201] [2021-11-03 03:42:33,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:33,849 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:42:33,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:42:33,850 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:42:33,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 03:42:33,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:33,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:42:33,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:42:34,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 03:42:34,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:34,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:42:34,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:34,147 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:42:34,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2121157201] [2021-11-03 03:42:34,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2121157201] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:34,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:34,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 03:42:34,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498270882] [2021-11-03 03:42:34,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:42:34,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:42:34,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:42:34,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:42:34,152 INFO L87 Difference]: Start difference. First operand 1023 states and 1120 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:38,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:38,548 INFO L93 Difference]: Finished difference Result 1444 states and 1533 transitions. [2021-11-03 03:42:38,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:42:38,549 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-03 03:42:38,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:38,555 INFO L225 Difference]: With dead ends: 1444 [2021-11-03 03:42:38,556 INFO L226 Difference]: Without dead ends: 1444 [2021-11-03 03:42:38,556 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:42:38,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2021-11-03 03:42:38,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 1013. [2021-11-03 03:42:38,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 565 states have (on average 1.9592920353982302) internal successors, (1107), 1012 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:38,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1107 transitions. [2021-11-03 03:42:38,585 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1107 transitions. Word has length 8 [2021-11-03 03:42:38,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:38,585 INFO L470 AbstractCegarLoop]: Abstraction has 1013 states and 1107 transitions. [2021-11-03 03:42:38,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:38,586 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1107 transitions. [2021-11-03 03:42:38,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-03 03:42:38,586 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:38,586 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:42:38,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 03:42:38,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:42:38,800 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr526ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 03:42:38,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:38,801 INFO L85 PathProgramCache]: Analyzing trace with hash -945573268, now seen corresponding path program 1 times [2021-11-03 03:42:38,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:42:38,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [442705463] [2021-11-03 03:42:38,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:38,802 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:42:38,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:42:38,805 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:42:38,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 03:42:38,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:38,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:42:38,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:42:39,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:39,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:42:39,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:39,133 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:42:39,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [442705463] [2021-11-03 03:42:39,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [442705463] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:39,133 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:39,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 03:42:39,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615139581] [2021-11-03 03:42:39,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:42:39,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:42:39,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:42:39,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:42:39,135 INFO L87 Difference]: Start difference. First operand 1013 states and 1107 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) [2021-11-03 03:42:39,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:39,908 INFO L93 Difference]: Finished difference Result 1460 states and 1586 transitions. [2021-11-03 03:42:39,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 03:42:39,910 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 [2021-11-03 03:42:39,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:39,920 INFO L225 Difference]: With dead ends: 1460 [2021-11-03 03:42:39,921 INFO L226 Difference]: Without dead ends: 1460 [2021-11-03 03:42:39,921 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 [2021-11-03 03:42:39,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2021-11-03 03:42:39,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1250. [2021-11-03 03:42:39,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 802 states have (on average 1.942643391521197) internal successors, (1558), 1249 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:39,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 1558 transitions. [2021-11-03 03:42:39,960 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 1558 transitions. Word has length 11 [2021-11-03 03:42:39,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:39,961 INFO L470 AbstractCegarLoop]: Abstraction has 1250 states and 1558 transitions. [2021-11-03 03:42:39,961 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) [2021-11-03 03:42:39,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 1558 transitions. [2021-11-03 03:42:39,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-03 03:42:39,962 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:39,962 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:42:39,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 03:42:40,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:42:40,174 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr529ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 03:42:40,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:40,175 INFO L85 PathProgramCache]: Analyzing trace with hash 751999808, now seen corresponding path program 1 times [2021-11-03 03:42:40,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:42:40,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2095494319] [2021-11-03 03:42:40,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:40,175 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:42:40,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:42:40,176 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:42:40,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 03:42:40,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:40,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:42:40,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:42:40,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 03:42:40,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 03:42:40,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 03:42:40,472 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-03 03:42:40,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-03 03:42:40,545 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-03 03:42:40,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-11-03 03:42:40,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:40,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:42:40,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:40,647 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:42:40,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2095494319] [2021-11-03 03:42:40,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2095494319] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:40,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:40,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 03:42:40,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383106354] [2021-11-03 03:42:40,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:42:40,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:42:40,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:42:40,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:42:40,649 INFO L87 Difference]: Start difference. First operand 1250 states and 1558 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 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) [2021-11-03 03:42:43,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:43,429 INFO L93 Difference]: Finished difference Result 1606 states and 1973 transitions. [2021-11-03 03:42:43,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:42:43,430 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 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 12 [2021-11-03 03:42:43,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:43,440 INFO L225 Difference]: With dead ends: 1606 [2021-11-03 03:42:43,440 INFO L226 Difference]: Without dead ends: 1606 [2021-11-03 03:42:43,441 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 03:42:43,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2021-11-03 03:42:43,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1249. [2021-11-03 03:42:43,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 801 states have (on average 1.9425717852684146) internal successors, (1556), 1248 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:43,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 1556 transitions. [2021-11-03 03:42:43,476 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 1556 transitions. Word has length 12 [2021-11-03 03:42:43,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:43,477 INFO L470 AbstractCegarLoop]: Abstraction has 1249 states and 1556 transitions. [2021-11-03 03:42:43,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 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) [2021-11-03 03:42:43,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 1556 transitions. [2021-11-03 03:42:43,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-03 03:42:43,478 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:43,479 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:42:43,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 03:42:43,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:42:43,708 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 03:42:43,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:43,709 INFO L85 PathProgramCache]: Analyzing trace with hash -520774338, now seen corresponding path program 1 times [2021-11-03 03:42:43,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:42:43,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [732395359] [2021-11-03 03:42:43,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:43,710 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:42:43,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:42:43,712 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:42:43,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 03:42:43,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:43,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 03:42:43,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:42:43,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:43,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:42:43,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:43,990 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:42:43,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [732395359] [2021-11-03 03:42:43,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [732395359] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:43,991 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:43,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 03:42:43,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500761695] [2021-11-03 03:42:43,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:42:43,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:42:43,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:42:43,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:42:43,993 INFO L87 Difference]: Start difference. First operand 1249 states and 1556 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:44,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:44,025 INFO L93 Difference]: Finished difference Result 1189 states and 1470 transitions. [2021-11-03 03:42:44,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:42:44,026 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-03 03:42:44,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:44,033 INFO L225 Difference]: With dead ends: 1189 [2021-11-03 03:42:44,033 INFO L226 Difference]: Without dead ends: 1189 [2021-11-03 03:42:44,033 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:42:44,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2021-11-03 03:42:44,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 1189. [2021-11-03 03:42:44,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 765 states have (on average 1.9215686274509804) internal successors, (1470), 1188 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:44,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 1470 transitions. [2021-11-03 03:42:44,061 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 1470 transitions. Word has length 18 [2021-11-03 03:42:44,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:44,061 INFO L470 AbstractCegarLoop]: Abstraction has 1189 states and 1470 transitions. [2021-11-03 03:42:44,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:44,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 1470 transitions. [2021-11-03 03:42:44,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-03 03:42:44,063 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:44,063 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:42:44,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 03:42:44,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:42:44,277 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 03:42:44,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:44,278 INFO L85 PathProgramCache]: Analyzing trace with hash 2047030904, now seen corresponding path program 1 times [2021-11-03 03:42:44,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:42:44,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [156098431] [2021-11-03 03:42:44,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:44,278 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:42:44,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:42:44,280 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:42:44,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 03:42:44,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:44,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:42:44,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:42:44,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:44,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:42:44,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:44,618 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:42:44,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [156098431] [2021-11-03 03:42:44,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [156098431] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:44,619 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:44,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 03:42:44,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20464165] [2021-11-03 03:42:44,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 03:42:44,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:42:44,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 03:42:44,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:42:44,621 INFO L87 Difference]: Start difference. First operand 1189 states and 1470 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:44,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:44,700 INFO L93 Difference]: Finished difference Result 1161 states and 1414 transitions. [2021-11-03 03:42:44,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:42:44,701 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-03 03:42:44,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:44,706 INFO L225 Difference]: With dead ends: 1161 [2021-11-03 03:42:44,707 INFO L226 Difference]: Without dead ends: 1161 [2021-11-03 03:42:44,707 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:42:44,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2021-11-03 03:42:44,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 1159. [2021-11-03 03:42:44,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1159 states, 749 states have (on average 1.8851802403204272) internal successors, (1412), 1158 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:44,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1159 states to 1159 states and 1412 transitions. [2021-11-03 03:42:44,743 INFO L78 Accepts]: Start accepts. Automaton has 1159 states and 1412 transitions. Word has length 20 [2021-11-03 03:42:44,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:44,743 INFO L470 AbstractCegarLoop]: Abstraction has 1159 states and 1412 transitions. [2021-11-03 03:42:44,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:44,744 INFO L276 IsEmpty]: Start isEmpty. Operand 1159 states and 1412 transitions. [2021-11-03 03:42:44,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-03 03:42:44,745 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:44,745 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] [2021-11-03 03:42:44,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 03:42:44,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:42:44,967 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 03:42:44,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:44,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1406589690, now seen corresponding path program 1 times [2021-11-03 03:42:44,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:42:44,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [944255936] [2021-11-03 03:42:44,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:44,968 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:42:44,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:42:44,969 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:42:44,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 03:42:45,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:45,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:42:45,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:42:45,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 03:42:45,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:45,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:42:45,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:45,477 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:42:45,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [944255936] [2021-11-03 03:42:45,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [944255936] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:45,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:45,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 03:42:45,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073692021] [2021-11-03 03:42:45,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:42:45,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:42:45,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:42:45,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:42:45,479 INFO L87 Difference]: Start difference. First operand 1159 states and 1412 transitions. Second operand has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:47,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:47,712 INFO L93 Difference]: Finished difference Result 1622 states and 1995 transitions. [2021-11-03 03:42:47,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 03:42:47,713 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 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 34 [2021-11-03 03:42:47,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:47,721 INFO L225 Difference]: With dead ends: 1622 [2021-11-03 03:42:47,721 INFO L226 Difference]: Without dead ends: 1622 [2021-11-03 03:42:47,722 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:42:47,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2021-11-03 03:42:47,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1155. [2021-11-03 03:42:47,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1155 states, 749 states have (on average 1.8744993324432577) internal successors, (1404), 1154 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:47,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 1404 transitions. [2021-11-03 03:42:47,749 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 1404 transitions. Word has length 34 [2021-11-03 03:42:47,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:47,750 INFO L470 AbstractCegarLoop]: Abstraction has 1155 states and 1404 transitions. [2021-11-03 03:42:47,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:47,750 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 1404 transitions. [2021-11-03 03:42:47,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-03 03:42:47,752 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:47,752 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] [2021-11-03 03:42:47,765 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-11-03 03:42:47,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:42:47,965 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr53REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 03:42:47,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:47,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1406589689, now seen corresponding path program 1 times [2021-11-03 03:42:47,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:42:47,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2066687320] [2021-11-03 03:42:47,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:47,967 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:42:47,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:42:47,968 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:42:47,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 03:42:48,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:48,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:42:48,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:42:48,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 03:42:48,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:48,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:42:49,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:49,137 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:42:49,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2066687320] [2021-11-03 03:42:49,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2066687320] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:49,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:49,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 03:42:49,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759394325] [2021-11-03 03:42:49,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:42:49,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:42:49,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:42:49,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:42:49,140 INFO L87 Difference]: Start difference. First operand 1155 states and 1404 transitions. Second operand has 6 states, 5 states have (on average 12.8) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:55,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:55,634 INFO L93 Difference]: Finished difference Result 1755 states and 2150 transitions. [2021-11-03 03:42:55,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 03:42:55,635 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-03 03:42:55,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:55,642 INFO L225 Difference]: With dead ends: 1755 [2021-11-03 03:42:55,642 INFO L226 Difference]: Without dead ends: 1755 [2021-11-03 03:42:55,643 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 03:42:55,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1755 states. [2021-11-03 03:42:55,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1755 to 1151. [2021-11-03 03:42:55,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1151 states, 749 states have (on average 1.863818424566088) internal successors, (1396), 1150 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:55,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 1396 transitions. [2021-11-03 03:42:55,668 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 1396 transitions. Word has length 34 [2021-11-03 03:42:55,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:55,668 INFO L470 AbstractCegarLoop]: Abstraction has 1151 states and 1396 transitions. [2021-11-03 03:42:55,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:55,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 1396 transitions. [2021-11-03 03:42:55,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-03 03:42:55,671 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:55,671 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] [2021-11-03 03:42:55,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 03:42:55,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:42:55,884 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 03:42:55,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:55,884 INFO L85 PathProgramCache]: Analyzing trace with hash -489765179, now seen corresponding path program 1 times [2021-11-03 03:42:55,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:42:55,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1151497016] [2021-11-03 03:42:55,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:55,885 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:42:55,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:42:55,887 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:42:55,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 03:42:56,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:56,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:42:56,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:42:56,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:56,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:42:56,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:56,476 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:42:56,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1151497016] [2021-11-03 03:42:56,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1151497016] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:56,476 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:56,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 03:42:56,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915580080] [2021-11-03 03:42:56,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:42:56,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:42:56,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:42:56,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:42:56,478 INFO L87 Difference]: Start difference. First operand 1151 states and 1396 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:56,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:56,546 INFO L93 Difference]: Finished difference Result 1139 states and 1376 transitions. [2021-11-03 03:42:56,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:42:56,547 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2021-11-03 03:42:56,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:56,554 INFO L225 Difference]: With dead ends: 1139 [2021-11-03 03:42:56,554 INFO L226 Difference]: Without dead ends: 1139 [2021-11-03 03:42:56,554 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:42:56,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2021-11-03 03:42:56,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1139. [2021-11-03 03:42:56,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1139 states, 737 states have (on average 1.8670284938941655) internal successors, (1376), 1138 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:56,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1376 transitions. [2021-11-03 03:42:56,578 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1376 transitions. Word has length 52 [2021-11-03 03:42:56,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:56,579 INFO L470 AbstractCegarLoop]: Abstraction has 1139 states and 1376 transitions. [2021-11-03 03:42:56,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:56,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1376 transitions. [2021-11-03 03:42:56,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 03:42:56,583 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:56,583 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] [2021-11-03 03:42:56,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 03:42:56,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:42:56,798 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 03:42:56,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:56,799 INFO L85 PathProgramCache]: Analyzing trace with hash -531678063, now seen corresponding path program 1 times [2021-11-03 03:42:56,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:42:56,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [545244790] [2021-11-03 03:42:56,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:56,800 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:42:56,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:42:56,802 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:42:56,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 03:42:57,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:57,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 03:42:57,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:42:57,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 03:42:57,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 03:42:58,425 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-03 03:42:58,426 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 28 treesize of output 30 [2021-11-03 03:42:58,447 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-03 03:42:58,448 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 27 treesize of output 23 [2021-11-03 03:42:58,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:58,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:43:04,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:43:04,106 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:43:04,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [545244790] [2021-11-03 03:43:04,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [545244790] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:43:04,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:43:04,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 03:43:04,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419542211] [2021-11-03 03:43:04,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:43:04,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:43:04,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:43:04,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-03 03:43:04,108 INFO L87 Difference]: Start difference. First operand 1139 states and 1376 transitions. Second operand has 6 states, 5 states have (on average 23.2) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:43:21,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:43:21,446 INFO L93 Difference]: Finished difference Result 2090 states and 2635 transitions. [2021-11-03 03:43:21,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 03:43:21,447 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 23.2) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 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 60 [2021-11-03 03:43:21,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:43:21,456 INFO L225 Difference]: With dead ends: 2090 [2021-11-03 03:43:21,456 INFO L226 Difference]: Without dead ends: 2090 [2021-11-03 03:43:21,457 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=26, Invalid=28, Unknown=2, NotChecked=0, Total=56 [2021-11-03 03:43:21,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2021-11-03 03:43:21,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 1101. [2021-11-03 03:43:21,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 737 states have (on average 1.8154681139755766) internal successors, (1338), 1100 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:43:21,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 1338 transitions. [2021-11-03 03:43:21,484 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 1338 transitions. Word has length 60 [2021-11-03 03:43:21,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:43:21,484 INFO L470 AbstractCegarLoop]: Abstraction has 1101 states and 1338 transitions. [2021-11-03 03:43:21,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 23.2) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:43:21,485 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 1338 transitions. [2021-11-03 03:43:21,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-03 03:43:21,486 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:43:21,486 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] [2021-11-03 03:43:21,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 03:43:21,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:43:21,700 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr76ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 03:43:21,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:43:21,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1426362414, now seen corresponding path program 1 times [2021-11-03 03:43:21,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:43:21,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1552980731] [2021-11-03 03:43:21,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:43:21,702 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:43:21,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:43:21,703 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:43:21,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 03:43:22,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:43:22,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:43:22,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:43:22,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 03:43:22,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-03 03:43:22,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-03 03:43:22,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:43:22,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:43:22,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:43:22,618 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:43:22,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1552980731] [2021-11-03 03:43:22,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1552980731] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:43:22,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:43:22,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 03:43:22,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971741761] [2021-11-03 03:43:22,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:43:22,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:43:22,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:43:22,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:43:22,620 INFO L87 Difference]: Start difference. First operand 1101 states and 1338 transitions. Second operand has 6 states, 5 states have (on average 13.2) internal successors, (66), 6 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) [2021-11-03 03:43:28,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:43:28,322 INFO L93 Difference]: Finished difference Result 1761 states and 2127 transitions. [2021-11-03 03:43:28,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-03 03:43:28,323 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 6 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 [2021-11-03 03:43:28,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:43:28,331 INFO L225 Difference]: With dead ends: 1761 [2021-11-03 03:43:28,331 INFO L226 Difference]: Without dead ends: 1761 [2021-11-03 03:43:28,332 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-03 03:43:28,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1761 states. [2021-11-03 03:43:28,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1761 to 1100. [2021-11-03 03:43:28,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1100 states, 737 states have (on average 1.814111261872456) internal successors, (1337), 1099 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:43:28,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 1337 transitions. [2021-11-03 03:43:28,366 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 1337 transitions. Word has length 66 [2021-11-03 03:43:28,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:43:28,367 INFO L470 AbstractCegarLoop]: Abstraction has 1100 states and 1337 transitions. [2021-11-03 03:43:28,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 6 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) [2021-11-03 03:43:28,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 1337 transitions. [2021-11-03 03:43:28,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-03 03:43:28,370 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:43:28,370 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:43:28,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 03:43:28,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:43:28,583 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr77ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 03:43:28,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:43:28,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1267561538, now seen corresponding path program 1 times [2021-11-03 03:43:28,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:43:28,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1386657892] [2021-11-03 03:43:28,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:43:28,585 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:43:28,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:43:28,586 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:43:28,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 03:43:29,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:43:29,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 03:43:29,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:43:29,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 03:43:29,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-03 03:43:29,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-03 03:43:29,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-03 03:43:29,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-03 03:43:29,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:43:29,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:43:29,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:43:29,935 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:43:29,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1386657892] [2021-11-03 03:43:29,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1386657892] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:43:29,936 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:43:29,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-03 03:43:29,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214473473] [2021-11-03 03:43:29,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 03:43:29,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:43:29,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 03:43:29,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-03 03:43:29,937 INFO L87 Difference]: Start difference. First operand 1100 states and 1337 transitions. Second operand has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:43:46,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:43:46,945 INFO L93 Difference]: Finished difference Result 1691 states and 2079 transitions. [2021-11-03 03:43:46,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-03 03:43:46,946 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 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 [2021-11-03 03:43:46,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:43:46,952 INFO L225 Difference]: With dead ends: 1691 [2021-11-03 03:43:46,953 INFO L226 Difference]: Without dead ends: 1691 [2021-11-03 03:43:46,953 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-11-03 03:43:46,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1691 states. [2021-11-03 03:43:46,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1691 to 1099. [2021-11-03 03:43:46,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1099 states, 737 states have (on average 1.812754409769335) internal successors, (1336), 1098 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:43:46,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 1336 transitions. [2021-11-03 03:43:46,970 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 1336 transitions. Word has length 67 [2021-11-03 03:43:46,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:43:46,971 INFO L470 AbstractCegarLoop]: Abstraction has 1099 states and 1336 transitions. [2021-11-03 03:43:46,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:43:46,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 1336 transitions. [2021-11-03 03:43:46,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-03 03:43:46,972 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:43:46,972 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] [2021-11-03 03:43:46,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-03 03:43:47,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:43:47,186 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 03:43:47,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:43:47,187 INFO L85 PathProgramCache]: Analyzing trace with hash -582276570, now seen corresponding path program 1 times [2021-11-03 03:43:47,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:43:47,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [348988970] [2021-11-03 03:43:47,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:43:47,187 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:43:47,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:43:47,188 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:43:47,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 03:43:47,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:43:47,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:43:47,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:43:47,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:43:47,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:43:47,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:43:47,974 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:43:47,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [348988970] [2021-11-03 03:43:47,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [348988970] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:43:47,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:43:47,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 03:43:47,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643045544] [2021-11-03 03:43:47,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:43:47,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:43:47,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:43:47,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:43:47,976 INFO L87 Difference]: Start difference. First operand 1099 states and 1336 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:43:48,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:43:48,104 INFO L93 Difference]: Finished difference Result 1849 states and 2273 transitions. [2021-11-03 03:43:48,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 03:43:48,104 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-03 03:43:48,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:43:48,111 INFO L225 Difference]: With dead ends: 1849 [2021-11-03 03:43:48,111 INFO L226 Difference]: Without dead ends: 1849 [2021-11-03 03:43:48,111 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-03 03:43:48,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1849 states. [2021-11-03 03:43:48,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1849 to 1102. [2021-11-03 03:43:48,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 740 states have (on average 1.8094594594594595) internal successors, (1339), 1101 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:43:48,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1339 transitions. [2021-11-03 03:43:48,129 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1339 transitions. Word has length 71 [2021-11-03 03:43:48,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:43:48,129 INFO L470 AbstractCegarLoop]: Abstraction has 1102 states and 1339 transitions. [2021-11-03 03:43:48,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:43:48,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1339 transitions. [2021-11-03 03:43:48,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-03 03:43:48,130 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:43:48,130 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] [2021-11-03 03:43:48,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 03:43:48,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:43:48,345 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 03:43:48,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:43:48,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1283072730, now seen corresponding path program 1 times [2021-11-03 03:43:48,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:43:48,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1181871034] [2021-11-03 03:43:48,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:43:48,346 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:43:48,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:43:48,347 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:43:48,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 03:43:48,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:43:48,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:43:48,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:43:49,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:43:49,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:43:49,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:43:49,268 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:43:49,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1181871034] [2021-11-03 03:43:49,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1181871034] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:43:49,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2030452141] [2021-11-03 03:43:49,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:43:49,269 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 03:43:49,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 03:43:49,272 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 03:43:49,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-03 03:43:50,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:43:50,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:43:50,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:43:50,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:43:50,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:43:50,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:43:50,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2030452141] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:43:50,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084904043] [2021-11-03 03:43:50,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:43:50,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:43:50,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:43:50,334 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:43:50,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-03 03:43:50,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:43:50,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:43:50,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:43:51,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:43:51,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:43:51,185 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:43:51,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084904043] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:43:51,185 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 03:43:51,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2021-11-03 03:43:51,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337958559] [2021-11-03 03:43:51,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 03:43:51,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:43:51,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 03:43:51,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-03 03:43:51,188 INFO L87 Difference]: Start difference. First operand 1102 states and 1339 transitions. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:43:51,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:43:51,548 INFO L93 Difference]: Finished difference Result 1855 states and 2279 transitions. [2021-11-03 03:43:51,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 03:43:51,548 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-03 03:43:51,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:43:51,566 INFO L225 Difference]: With dead ends: 1855 [2021-11-03 03:43:51,566 INFO L226 Difference]: Without dead ends: 1855 [2021-11-03 03:43:51,567 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 424 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-11-03 03:43:51,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1855 states. [2021-11-03 03:43:51,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1855 to 1108. [2021-11-03 03:43:51,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1108 states, 746 states have (on average 1.8029490616621984) internal successors, (1345), 1107 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:43:51,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 1345 transitions. [2021-11-03 03:43:51,587 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 1345 transitions. Word has length 73 [2021-11-03 03:43:51,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:43:51,588 INFO L470 AbstractCegarLoop]: Abstraction has 1108 states and 1345 transitions. [2021-11-03 03:43:51,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:43:51,588 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 1345 transitions. [2021-11-03 03:43:51,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-03 03:43:51,589 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:43:51,589 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] [2021-11-03 03:43:51,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-03 03:43:51,806 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2021-11-03 03:43:52,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-03 03:43:52,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:43:52,204 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 03:43:52,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:43:52,204 INFO L85 PathProgramCache]: Analyzing trace with hash -376896730, now seen corresponding path program 2 times [2021-11-03 03:43:52,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:43:52,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2007530278] [2021-11-03 03:43:52,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 03:43:52,205 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:43:52,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:43:52,206 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:43:52,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-03 03:43:52,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 03:43:52,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:43:52,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 03:43:52,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:43:53,262 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:43:53,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:43:53,763 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:43:53,763 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:43:53,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2007530278] [2021-11-03 03:43:53,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2007530278] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:43:53,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1232753846] [2021-11-03 03:43:53,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 03:43:53,764 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 03:43:53,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 03:43:53,771 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 03:43:53,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-03 03:43:55,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 03:43:55,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:43:55,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 03:43:55,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:43:55,382 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:43:55,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:43:55,537 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:43:55,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1232753846] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:43:55,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521045416] [2021-11-03 03:43:55,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 03:43:55,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:43:55,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:43:55,538 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:43:55,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-03 03:44:30,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 03:44:30,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:44:30,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 03:44:30,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:44:31,061 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:44:31,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:44:31,202 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:44:31,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521045416] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:44:31,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 03:44:31,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 18 [2021-11-03 03:44:31,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052167426] [2021-11-03 03:44:31,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-03 03:44:31,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:44:31,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-03 03:44:31,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-11-03 03:44:31,205 INFO L87 Difference]: Start difference. First operand 1108 states and 1345 transitions. Second operand has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:44:33,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:44:33,191 INFO L93 Difference]: Finished difference Result 1867 states and 2291 transitions. [2021-11-03 03:44:33,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-03 03:44:33,192 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 0 states have call successors, (0), 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 77 [2021-11-03 03:44:33,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:44:33,196 INFO L225 Difference]: With dead ends: 1867 [2021-11-03 03:44:33,196 INFO L226 Difference]: Without dead ends: 1867 [2021-11-03 03:44:33,197 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 440 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=370, Invalid=622, Unknown=0, NotChecked=0, Total=992 [2021-11-03 03:44:33,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1867 states. [2021-11-03 03:44:33,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1867 to 1120. [2021-11-03 03:44:33,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 758 states have (on average 1.7902374670184698) internal successors, (1357), 1119 states have internal predecessors, (1357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:44:33,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 1357 transitions. [2021-11-03 03:44:33,210 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 1357 transitions. Word has length 77 [2021-11-03 03:44:33,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:44:33,210 INFO L470 AbstractCegarLoop]: Abstraction has 1120 states and 1357 transitions. [2021-11-03 03:44:33,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:44:33,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 1357 transitions. [2021-11-03 03:44:33,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-03 03:44:33,211 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:44:33,211 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] [2021-11-03 03:44:33,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-03 03:44:33,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-03 03:44:33,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-03 03:44:33,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 03:44:33,812 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 03:44:33,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:44:33,812 INFO L85 PathProgramCache]: Analyzing trace with hash 688279334, now seen corresponding path program 3 times [2021-11-03 03:44:33,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:44:33,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [289338097] [2021-11-03 03:44:33,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 03:44:33,813 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:44:33,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:44:33,814 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:44:33,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-03 03:44:35,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-03 03:44:35,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:44:35,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 03:44:35,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:44:35,623 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:44:35,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:44:36,827 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:44:36,827 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:44:36,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [289338097] [2021-11-03 03:44:36,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [289338097] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:44:36,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [546182544] [2021-11-03 03:44:36,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 03:44:36,828 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 03:44:36,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 03:44:36,829 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 03:44:36,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-03 03:44:39,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-03 03:44:39,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:44:39,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-03 03:44:39,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:44:39,616 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:44:39,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:44:42,550 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:44:42,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [546182544] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:44:42,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797416347] [2021-11-03 03:44:42,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 03:44:42,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:44:42,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:44:42,551 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:44:42,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d478d1af-5e66-44f5-861c-ab3a65c073c0/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process