./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-1.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_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/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_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/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_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/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 69d24e9affd7540aafb8052ecd737d7732ca2a63c7e8e16adc4217413d1d99a5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:38:11,543 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:38:11,546 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:38:11,604 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:38:11,605 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:38:11,610 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:38:11,613 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:38:11,617 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:38:11,620 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:38:11,628 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:38:11,629 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:38:11,631 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:38:11,631 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:38:11,634 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:38:11,636 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:38:11,641 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:38:11,642 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:38:11,644 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:38:11,649 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:38:11,652 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:38:11,658 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:38:11,660 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:38:11,663 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:38:11,664 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:38:11,670 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:38:11,671 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:38:11,671 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:38:11,673 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:38:11,673 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:38:11,675 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:38:11,675 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:38:11,676 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:38:11,678 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:38:11,679 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:38:11,680 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:38:11,681 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:38:11,681 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:38:11,681 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:38:11,682 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:38:11,683 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:38:11,683 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:38:11,684 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-03 05:38:11,727 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:38:11,728 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:38:11,729 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:38:11,729 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:38:11,729 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:38:11,730 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:38:11,730 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:38:11,730 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:38:11,730 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:38:11,731 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:38:11,732 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:38:11,732 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:38:11,732 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:38:11,732 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:38:11,733 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:38:11,733 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 05:38:11,733 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 05:38:11,734 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:38:11,734 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:38:11,734 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 05:38:11,734 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:38:11,735 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:38:11,735 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:38:11,735 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 05:38:11,735 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 05:38:11,736 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 05:38:11,737 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:38:11,737 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:38:11,738 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:38:11,738 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:38:11,738 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:38:11,739 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:38:11,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:38:11,739 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:38:11,739 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:38:11,740 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:38:11,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:38:11,740 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:38:11,740 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:38:11,740 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_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 69d24e9affd7540aafb8052ecd737d7732ca2a63c7e8e16adc4217413d1d99a5 [2021-11-03 05:38:11,990 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:38:12,022 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:38:12,025 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:38:12,026 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:38:12,027 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:38:12,028 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-1.i [2021-11-03 05:38:12,112 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/data/23e68a8d4/06c7c1c7215943269ade265bb4274300/FLAGef3550775 [2021-11-03 05:38:12,666 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:38:12,667 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-1.i [2021-11-03 05:38:12,685 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/data/23e68a8d4/06c7c1c7215943269ade265bb4274300/FLAGef3550775 [2021-11-03 05:38:12,950 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/data/23e68a8d4/06c7c1c7215943269ade265bb4274300 [2021-11-03 05:38:12,957 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:38:12,959 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:38:12,977 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:38:12,977 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:38:12,980 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:38:12,980 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:38:12" (1/1) ... [2021-11-03 05:38:12,981 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dc98b39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:38:12, skipping insertion in model container [2021-11-03 05:38:12,981 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:38:12" (1/1) ... [2021-11-03 05:38:12,988 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:38:13,044 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:38:13,466 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_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-1.i[37019,37032] [2021-11-03 05:38:13,579 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_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-1.i[47352,47365] [2021-11-03 05:38:13,594 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:38:13,613 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 05:38:13,613 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1444ab1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:38:13, skipping insertion in model container [2021-11-03 05:38:13,614 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:38:13,614 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 05:38:13,616 INFO L168 Benchmark]: Toolchain (without parser) took 656.03 ms. Allocated memory is still 151.0 MB. Free memory was 113.9 MB in the beginning and 117.5 MB in the end (delta: -3.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-03 05:38:13,617 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 88.1 MB. Free memory was 62.9 MB in the beginning and 62.9 MB in the end (delta: 28.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:38:13,618 INFO L168 Benchmark]: CACSL2BoogieTranslator took 637.14 ms. Allocated memory is still 151.0 MB. Free memory was 113.6 MB in the beginning and 117.5 MB in the end (delta: -3.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-03 05:38:13,620 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 88.1 MB. Free memory was 62.9 MB in the beginning and 62.9 MB in the end (delta: 28.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 637.14 ms. Allocated memory is still 151.0 MB. Free memory was 113.6 MB in the beginning and 117.5 MB in the end (delta: -3.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 815]: 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_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/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_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/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_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/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 69d24e9affd7540aafb8052ecd737d7732ca2a63c7e8e16adc4217413d1d99a5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:38:15,849 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:38:15,851 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:38:15,901 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:38:15,902 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:38:15,906 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:38:15,909 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:38:15,913 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:38:15,916 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:38:15,923 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:38:15,925 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:38:15,927 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:38:15,927 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:38:15,930 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:38:15,932 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:38:15,936 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:38:15,938 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:38:15,938 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:38:15,940 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:38:15,948 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:38:15,950 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:38:15,951 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:38:15,953 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:38:15,956 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:38:15,964 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:38:15,965 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:38:15,965 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:38:15,967 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:38:15,968 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:38:15,969 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:38:15,970 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:38:15,971 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:38:15,973 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:38:15,974 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:38:15,975 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:38:15,976 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:38:15,977 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:38:15,978 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:38:15,978 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:38:15,980 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:38:15,981 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:38:15,986 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-03 05:38:16,034 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:38:16,034 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:38:16,035 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:38:16,036 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:38:16,036 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:38:16,036 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:38:16,036 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:38:16,036 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:38:16,037 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:38:16,038 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 05:38:16,039 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 05:38:16,039 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:38:16,040 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:38:16,040 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 05:38:16,040 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:38:16,040 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:38:16,040 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:38:16,041 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 05:38:16,041 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 05:38:16,041 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 05:38:16,041 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:38:16,041 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:38:16,042 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 05:38:16,042 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 05:38:16,042 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:38:16,042 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:38:16,043 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:38:16,043 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 05:38:16,043 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:38:16,043 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:38:16,043 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:38:16,044 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:38:16,044 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 05:38:16,045 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 05:38:16,045 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:38:16,045 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:38:16,045 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_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 69d24e9affd7540aafb8052ecd737d7732ca2a63c7e8e16adc4217413d1d99a5 [2021-11-03 05:38:16,429 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:38:16,450 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:38:16,453 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:38:16,454 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:38:16,455 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:38:16,456 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-1.i [2021-11-03 05:38:16,533 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/data/0d89c499b/cdb543e97ae14f3786c96b5f89c0313e/FLAG627dffd0f [2021-11-03 05:38:17,203 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:38:17,204 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-1.i [2021-11-03 05:38:17,230 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/data/0d89c499b/cdb543e97ae14f3786c96b5f89c0313e/FLAG627dffd0f [2021-11-03 05:38:17,425 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/data/0d89c499b/cdb543e97ae14f3786c96b5f89c0313e [2021-11-03 05:38:17,427 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:38:17,429 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:38:17,430 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:38:17,430 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:38:17,441 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:38:17,442 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:38:17" (1/1) ... [2021-11-03 05:38:17,443 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3917a961 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:38:17, skipping insertion in model container [2021-11-03 05:38:17,444 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:38:17" (1/1) ... [2021-11-03 05:38:17,451 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:38:17,513 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:38:18,058 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-1.i[37019,37032] [2021-11-03 05:38:18,217 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_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-1.i[47352,47365] [2021-11-03 05:38:18,223 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:38:18,234 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 05:38:18,252 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:38:18,273 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_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-1.i[37019,37032] [2021-11-03 05:38:18,360 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_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-1.i[47352,47365] [2021-11-03 05:38:18,373 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:38:18,387 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:38:18,428 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_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-1.i[37019,37032] [2021-11-03 05:38:18,521 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_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-1.i[47352,47365] [2021-11-03 05:38:18,539 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:38:18,612 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:38:18,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:38:18 WrapperNode [2021-11-03 05:38:18,613 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:38:18,614 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:38:18,614 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:38:18,614 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:38:18,621 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:38:18" (1/1) ... [2021-11-03 05:38:18,655 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:38:18" (1/1) ... [2021-11-03 05:38:18,733 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:38:18,734 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:38:18,734 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:38:18,734 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:38:18,742 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:38:18" (1/1) ... [2021-11-03 05:38:18,743 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:38:18" (1/1) ... [2021-11-03 05:38:18,753 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:38:18" (1/1) ... [2021-11-03 05:38:18,754 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:38:18" (1/1) ... [2021-11-03 05:38:18,845 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:38:18" (1/1) ... [2021-11-03 05:38:18,856 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:38:18" (1/1) ... [2021-11-03 05:38:18,875 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:38:18" (1/1) ... [2021-11-03 05:38:18,894 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:38:18,895 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:38:18,895 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:38:18,895 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:38:18,896 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:38:18" (1/1) ... [2021-11-03 05:38:18,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:38:18,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:38:18,930 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:38:18,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:38:18,983 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-03 05:38:18,983 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 05:38:18,983 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:38:18,984 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-03 05:38:18,984 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 05:38:18,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 05:38:18,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 05:38:18,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 05:38:18,984 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 05:38:18,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 05:38:18,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:38:18,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:38:23,474 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:38:23,474 INFO L299 CfgBuilder]: Removed 76 assume(true) statements. [2021-11-03 05:38:23,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:38:23 BoogieIcfgContainer [2021-11-03 05:38:23,480 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:38:23,482 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:38:23,482 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:38:23,485 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:38:23,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:38:17" (1/3) ... [2021-11-03 05:38:23,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ef482f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:38:23, skipping insertion in model container [2021-11-03 05:38:23,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:38:18" (2/3) ... [2021-11-03 05:38:23,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ef482f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:38:23, skipping insertion in model container [2021-11-03 05:38:23,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:38:23" (3/3) ... [2021-11-03 05:38:23,491 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SFH_test2-1.i [2021-11-03 05:38:23,499 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:38:23,499 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 435 error locations. [2021-11-03 05:38:23,553 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:38:23,561 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 05:38:23,569 INFO L340 AbstractCegarLoop]: Starting to check reachability of 435 error locations. [2021-11-03 05:38:23,610 INFO L276 IsEmpty]: Start isEmpty. Operand has 890 states, 454 states have (on average 2.2158590308370045) internal successors, (1006), 889 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states 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 05:38:23,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-03 05:38:23,615 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:38:23,616 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-03 05:38:23,616 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 431 more)] === [2021-11-03 05:38:23,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:38:23,622 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-11-03 05:38:23,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:38:23,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [577489862] [2021-11-03 05:38:23,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:38:23,635 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:38:23,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:38:23,638 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:38:23,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 05:38:23,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:38:23,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:38:23,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:38:23,905 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 05:38:23,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:38:23,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:38:23,938 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 05:38:23,939 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:38:23,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [577489862] [2021-11-03 05:38:23,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [577489862] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:38:23,940 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:38:23,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 05:38:23,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061478129] [2021-11-03 05:38:23,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:38:23,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:38:23,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:38:23,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:38:23,963 INFO L87 Difference]: Start difference. First operand has 890 states, 454 states have (on average 2.2158590308370045) internal successors, (1006), 889 states have internal predecessors, (1006), 0 states have call successors, (0), 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 05:38:25,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:38:25,669 INFO L93 Difference]: Finished difference Result 877 states and 929 transitions. [2021-11-03 05:38:25,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:38:25,671 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 05:38:25,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:38:25,700 INFO L225 Difference]: With dead ends: 877 [2021-11-03 05:38:25,702 INFO L226 Difference]: Without dead ends: 875 [2021-11-03 05:38:25,704 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 05:38:25,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-11-03 05:38:25,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 874. [2021-11-03 05:38:25,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 454 states have (on average 2.041850220264317) internal successors, (927), 873 states have internal predecessors, (927), 0 states have call successors, (0), 0 states 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 05:38:25,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 927 transitions. [2021-11-03 05:38:25,829 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 927 transitions. Word has length 3 [2021-11-03 05:38:25,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:38:25,830 INFO L470 AbstractCegarLoop]: Abstraction has 874 states and 927 transitions. [2021-11-03 05:38:25,831 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 05:38:25,831 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 927 transitions. [2021-11-03 05:38:25,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-03 05:38:25,832 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:38:25,832 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-03 05:38:25,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 05:38:26,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:38:26,046 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 431 more)] === [2021-11-03 05:38:26,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:38:26,047 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-11-03 05:38:26,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:38:26,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1815337382] [2021-11-03 05:38:26,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:38:26,048 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:38:26,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:38:26,050 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:38:26,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 05:38:26,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:38:26,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:38:26,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:38:26,231 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 05:38:26,245 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 05:38:26,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:38:26,300 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 05:38:26,301 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:38:26,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1815337382] [2021-11-03 05:38:26,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1815337382] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:38:26,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:38:26,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 05:38:26,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111087989] [2021-11-03 05:38:26,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:38:26,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:38:26,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:38:26,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:38:26,304 INFO L87 Difference]: Start difference. First operand 874 states and 927 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 05:38:30,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:38:30,301 INFO L93 Difference]: Finished difference Result 1178 states and 1260 transitions. [2021-11-03 05:38:30,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:38:30,302 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 05:38:30,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:38:30,310 INFO L225 Difference]: With dead ends: 1178 [2021-11-03 05:38:30,310 INFO L226 Difference]: Without dead ends: 1178 [2021-11-03 05:38:30,311 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 05:38:30,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2021-11-03 05:38:30,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 909. [2021-11-03 05:38:30,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 498 states have (on average 2.0200803212851404) internal successors, (1006), 908 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states 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 05:38:30,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 1006 transitions. [2021-11-03 05:38:30,334 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 1006 transitions. Word has length 3 [2021-11-03 05:38:30,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:38:30,334 INFO L470 AbstractCegarLoop]: Abstraction has 909 states and 1006 transitions. [2021-11-03 05:38:30,335 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 05:38:30,335 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 1006 transitions. [2021-11-03 05:38:30,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 05:38:30,335 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:38:30,336 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:38:30,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-03 05:38:30,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:38:30,546 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 431 more)] === [2021-11-03 05:38:30,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:38:30,547 INFO L85 PathProgramCache]: Analyzing trace with hash 62249618, now seen corresponding path program 1 times [2021-11-03 05:38:30,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:38:30,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1930975717] [2021-11-03 05:38:30,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:38:30,548 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:38:30,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:38:30,552 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:38:30,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 05:38:30,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:38:30,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:38:30,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:38:30,693 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 05:38:30,723 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 05:38:30,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:38:30,747 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 05:38:30,747 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:38:30,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1930975717] [2021-11-03 05:38:30,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1930975717] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:38:30,754 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:38:30,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 05:38:30,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445438624] [2021-11-03 05:38:30,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:38:30,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:38:30,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:38:30,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:38:30,758 INFO L87 Difference]: Start difference. First operand 909 states and 1006 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 05:38:32,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:38:32,401 INFO L93 Difference]: Finished difference Result 1096 states and 1215 transitions. [2021-11-03 05:38:32,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:38:32,403 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 05:38:32,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:38:32,409 INFO L225 Difference]: With dead ends: 1096 [2021-11-03 05:38:32,409 INFO L226 Difference]: Without dead ends: 1096 [2021-11-03 05:38:32,409 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 05:38:32,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2021-11-03 05:38:32,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 862. [2021-11-03 05:38:32,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 498 states have (on average 1.9196787148594376) internal successors, (956), 861 states have internal predecessors, (956), 0 states have call successors, (0), 0 states 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 05:38:32,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 956 transitions. [2021-11-03 05:38:32,429 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 956 transitions. Word has length 8 [2021-11-03 05:38:32,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:38:32,430 INFO L470 AbstractCegarLoop]: Abstraction has 862 states and 956 transitions. [2021-11-03 05:38:32,430 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 05:38:32,430 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 956 transitions. [2021-11-03 05:38:32,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 05:38:32,431 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:38:32,431 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:38:32,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 05:38:32,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:38:32,652 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 431 more)] === [2021-11-03 05:38:32,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:38:32,652 INFO L85 PathProgramCache]: Analyzing trace with hash 62249619, now seen corresponding path program 1 times [2021-11-03 05:38:32,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:38:32,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [545464605] [2021-11-03 05:38:32,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:38:32,653 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:38:32,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:38:32,654 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:38:32,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 05:38:32,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:38:32,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:38:32,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:38:32,779 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 05:38:32,814 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 05:38:32,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:38:32,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:38:32,893 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:38:32,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [545464605] [2021-11-03 05:38:32,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [545464605] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:38:32,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:38:32,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 05:38:32,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184090806] [2021-11-03 05:38:32,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:38:32,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:38:32,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:38:32,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:38:32,895 INFO L87 Difference]: Start difference. First operand 862 states and 956 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 05:38:35,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:38:35,858 INFO L93 Difference]: Finished difference Result 1128 states and 1210 transitions. [2021-11-03 05:38:35,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:38:35,859 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 05:38:35,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:38:35,865 INFO L225 Difference]: With dead ends: 1128 [2021-11-03 05:38:35,865 INFO L226 Difference]: Without dead ends: 1128 [2021-11-03 05:38:35,865 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 05:38:35,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2021-11-03 05:38:35,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 852. [2021-11-03 05:38:35,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 498 states have (on average 1.893574297188755) internal successors, (943), 851 states have internal predecessors, (943), 0 states have call successors, (0), 0 states 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 05:38:35,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 943 transitions. [2021-11-03 05:38:35,885 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 943 transitions. Word has length 8 [2021-11-03 05:38:35,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:38:35,885 INFO L470 AbstractCegarLoop]: Abstraction has 852 states and 943 transitions. [2021-11-03 05:38:35,886 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 05:38:35,886 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 943 transitions. [2021-11-03 05:38:35,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-03 05:38:35,887 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:38:35,887 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:38:35,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 05:38:36,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:38:36,097 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr434ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 431 more)] === [2021-11-03 05:38:36,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:38:36,099 INFO L85 PathProgramCache]: Analyzing trace with hash 523681018, now seen corresponding path program 1 times [2021-11-03 05:38:36,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:38:36,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2044931676] [2021-11-03 05:38:36,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:38:36,100 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:38:36,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:38:36,101 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:38:36,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 05:38:36,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:38:36,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:38:36,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:38:36,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:38:36,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:38:36,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:38:36,329 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-03 05:38:36,330 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 05:38:36,406 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-03 05:38:36,406 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 05:38:36,428 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 05:38:36,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:38:36,501 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 05:38:36,501 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:38:36,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2044931676] [2021-11-03 05:38:36,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2044931676] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:38:36,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:38:36,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:38:36,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963436252] [2021-11-03 05:38:36,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:38:36,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:38:36,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:38:36,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:38:36,503 INFO L87 Difference]: Start difference. First operand 852 states and 943 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:38:38,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:38:38,378 INFO L93 Difference]: Finished difference Result 1079 states and 1194 transitions. [2021-11-03 05:38:38,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:38:38,380 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-03 05:38:38,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:38:38,385 INFO L225 Difference]: With dead ends: 1079 [2021-11-03 05:38:38,385 INFO L226 Difference]: Without dead ends: 1079 [2021-11-03 05:38:38,385 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 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 05:38:38,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1079 states. [2021-11-03 05:38:38,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1079 to 852. [2021-11-03 05:38:38,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 498 states have (on average 1.891566265060241) internal successors, (942), 851 states have internal predecessors, (942), 0 states have call successors, (0), 0 states 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 05:38:38,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 942 transitions. [2021-11-03 05:38:38,405 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 942 transitions. Word has length 10 [2021-11-03 05:38:38,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:38:38,405 INFO L470 AbstractCegarLoop]: Abstraction has 852 states and 942 transitions. [2021-11-03 05:38:38,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:38:38,406 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 942 transitions. [2021-11-03 05:38:38,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-03 05:38:38,406 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:38:38,407 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 05:38:38,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 05:38:38,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:38:38,619 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 431 more)] === [2021-11-03 05:38:38,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:38:38,619 INFO L85 PathProgramCache]: Analyzing trace with hash -520774338, now seen corresponding path program 1 times [2021-11-03 05:38:38,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:38:38,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2081178602] [2021-11-03 05:38:38,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:38:38,620 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:38:38,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:38:38,621 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:38:38,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 05:38:38,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:38:38,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:38:38,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:38:38,788 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 05:38:38,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:38:38,831 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 05:38:38,832 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:38:38,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2081178602] [2021-11-03 05:38:38,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2081178602] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:38:38,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:38:38,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:38:38,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236326133] [2021-11-03 05:38:38,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:38:38,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:38:38,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:38:38,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:38:38,835 INFO L87 Difference]: Start difference. First operand 852 states and 942 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 05:38:38,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:38:38,859 INFO L93 Difference]: Finished difference Result 819 states and 908 transitions. [2021-11-03 05:38:38,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:38:38,861 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 05:38:38,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:38:38,865 INFO L225 Difference]: With dead ends: 819 [2021-11-03 05:38:38,865 INFO L226 Difference]: Without dead ends: 819 [2021-11-03 05:38:38,867 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 05:38:38,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2021-11-03 05:38:38,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 810. [2021-11-03 05:38:38,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 480 states have (on average 1.8729166666666666) internal successors, (899), 809 states have internal predecessors, (899), 0 states have call successors, (0), 0 states 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 05:38:38,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 899 transitions. [2021-11-03 05:38:38,896 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 899 transitions. Word has length 18 [2021-11-03 05:38:38,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:38:38,897 INFO L470 AbstractCegarLoop]: Abstraction has 810 states and 899 transitions. [2021-11-03 05:38:38,897 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 05:38:38,897 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 899 transitions. [2021-11-03 05:38:38,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-03 05:38:38,898 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:38:38,898 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 05:38:38,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 05:38:39,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:38:39,109 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 431 more)] === [2021-11-03 05:38:39,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:38:39,110 INFO L85 PathProgramCache]: Analyzing trace with hash 2047030904, now seen corresponding path program 1 times [2021-11-03 05:38:39,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:38:39,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [968694040] [2021-11-03 05:38:39,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:38:39,111 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:38:39,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:38:39,111 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:38:39,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 05:38:39,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:38:39,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:38:39,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:38:39,315 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 05:38:39,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:38:39,369 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 05:38:39,369 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:38:39,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [968694040] [2021-11-03 05:38:39,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [968694040] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:38:39,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:38:39,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 05:38:39,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535421622] [2021-11-03 05:38:39,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:38:39,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:38:39,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:38:39,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:38:39,371 INFO L87 Difference]: Start difference. First operand 810 states and 899 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 05:38:39,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:38:39,433 INFO L93 Difference]: Finished difference Result 798 states and 880 transitions. [2021-11-03 05:38:39,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:38:39,437 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 05:38:39,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:38:39,441 INFO L225 Difference]: With dead ends: 798 [2021-11-03 05:38:39,441 INFO L226 Difference]: Without dead ends: 798 [2021-11-03 05:38:39,445 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 05:38:39,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-11-03 05:38:39,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 788. [2021-11-03 05:38:39,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 472 states have (on average 1.8432203389830508) internal successors, (870), 787 states have internal predecessors, (870), 0 states have call successors, (0), 0 states 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 05:38:39,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 870 transitions. [2021-11-03 05:38:39,469 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 870 transitions. Word has length 20 [2021-11-03 05:38:39,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:38:39,470 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 870 transitions. [2021-11-03 05:38:39,470 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 05:38:39,470 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 870 transitions. [2021-11-03 05:38:39,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-03 05:38:39,472 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:38:39,472 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 05:38:39,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 05:38:39,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:38:39,693 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 431 more)] === [2021-11-03 05:38:39,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:38:39,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1406589690, now seen corresponding path program 1 times [2021-11-03 05:38:39,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:38:39,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [569502862] [2021-11-03 05:38:39,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:38:39,694 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:38:39,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:38:39,695 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:38:39,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 05:38:39,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:38:39,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:38:39,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:38:39,884 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 05:38:40,013 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 05:38:40,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:38:40,141 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 05:38:40,141 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:38:40,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [569502862] [2021-11-03 05:38:40,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [569502862] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:38:40,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:38:40,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 05:38:40,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317872490] [2021-11-03 05:38:40,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:38:40,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:38:40,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:38:40,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:38:40,143 INFO L87 Difference]: Start difference. First operand 788 states and 870 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 05:38:41,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:38:41,779 INFO L93 Difference]: Finished difference Result 1030 states and 1137 transitions. [2021-11-03 05:38:41,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:38:41,779 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 05:38:41,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:38:41,784 INFO L225 Difference]: With dead ends: 1030 [2021-11-03 05:38:41,784 INFO L226 Difference]: Without dead ends: 1030 [2021-11-03 05:38:41,785 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 05:38:41,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2021-11-03 05:38:41,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 784. [2021-11-03 05:38:41,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 472 states have (on average 1.8347457627118644) internal successors, (866), 783 states have internal predecessors, (866), 0 states have call successors, (0), 0 states 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 05:38:41,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 866 transitions. [2021-11-03 05:38:41,803 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 866 transitions. Word has length 34 [2021-11-03 05:38:41,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:38:41,804 INFO L470 AbstractCegarLoop]: Abstraction has 784 states and 866 transitions. [2021-11-03 05:38:41,804 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 05:38:41,804 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 866 transitions. [2021-11-03 05:38:41,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-03 05:38:41,805 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:38:41,805 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 05:38:41,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 05:38:42,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:38:42,017 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr53REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 431 more)] === [2021-11-03 05:38:42,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:38:42,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1406589689, now seen corresponding path program 1 times [2021-11-03 05:38:42,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:38:42,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [852050644] [2021-11-03 05:38:42,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:38:42,018 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:38:42,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:38:42,019 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:38:42,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 05:38:42,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:38:42,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:38:42,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:38:42,227 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 05:38:42,530 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 05:38:42,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:38:43,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:38:43,033 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:38:43,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [852050644] [2021-11-03 05:38:43,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [852050644] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:38:43,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:38:43,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 05:38:43,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418013129] [2021-11-03 05:38:43,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:38:43,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:38:43,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:38:43,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:38:43,035 INFO L87 Difference]: Start difference. First operand 784 states and 866 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 05:38:47,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:38:47,088 INFO L93 Difference]: Finished difference Result 1068 states and 1141 transitions. [2021-11-03 05:38:47,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:38:47,089 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 05:38:47,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:38:47,093 INFO L225 Difference]: With dead ends: 1068 [2021-11-03 05:38:47,093 INFO L226 Difference]: Without dead ends: 1068 [2021-11-03 05:38:47,093 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 05:38:47,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2021-11-03 05:38:47,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 780. [2021-11-03 05:38:47,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 472 states have (on average 1.826271186440678) internal successors, (862), 779 states have internal predecessors, (862), 0 states have call successors, (0), 0 states 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 05:38:47,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 862 transitions. [2021-11-03 05:38:47,111 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 862 transitions. Word has length 34 [2021-11-03 05:38:47,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:38:47,111 INFO L470 AbstractCegarLoop]: Abstraction has 780 states and 862 transitions. [2021-11-03 05:38:47,112 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 05:38:47,112 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 862 transitions. [2021-11-03 05:38:47,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-03 05:38:47,113 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:38:47,114 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] [2021-11-03 05:38:47,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 05:38:47,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:38:47,325 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr117REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 431 more)] === [2021-11-03 05:38:47,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:38:47,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1651334985, now seen corresponding path program 1 times [2021-11-03 05:38:47,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:38:47,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1037248320] [2021-11-03 05:38:47,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:38:47,326 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:38:47,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:38:47,327 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:38:47,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 05:38:47,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:38:47,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:38:47,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:38:47,717 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 05:38:47,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:38:47,851 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 05:38:47,851 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:38:47,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1037248320] [2021-11-03 05:38:47,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1037248320] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:38:47,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:38:47,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 05:38:47,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28934008] [2021-11-03 05:38:47,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:38:47,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:38:47,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:38:47,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:38:47,854 INFO L87 Difference]: Start difference. First operand 780 states and 862 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states 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 05:38:47,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:38:47,906 INFO L93 Difference]: Finished difference Result 783 states and 861 transitions. [2021-11-03 05:38:47,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:38:47,906 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 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 49 [2021-11-03 05:38:47,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:38:47,910 INFO L225 Difference]: With dead ends: 783 [2021-11-03 05:38:47,910 INFO L226 Difference]: Without dead ends: 783 [2021-11-03 05:38:47,911 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 94 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 05:38:47,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2021-11-03 05:38:47,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 774. [2021-11-03 05:38:47,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 466 states have (on average 1.8283261802575108) internal successors, (852), 773 states have internal predecessors, (852), 0 states have call successors, (0), 0 states 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 05:38:47,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 852 transitions. [2021-11-03 05:38:47,927 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 852 transitions. Word has length 49 [2021-11-03 05:38:47,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:38:47,927 INFO L470 AbstractCegarLoop]: Abstraction has 774 states and 852 transitions. [2021-11-03 05:38:47,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states 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 05:38:47,928 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 852 transitions. [2021-11-03 05:38:47,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-03 05:38:47,929 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:38:47,930 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] [2021-11-03 05:38:47,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 05:38:48,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:38:48,143 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr117REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 431 more)] === [2021-11-03 05:38:48,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:38:48,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1352588907, now seen corresponding path program 1 times [2021-11-03 05:38:48,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:38:48,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [318472399] [2021-11-03 05:38:48,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:38:48,144 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:38:48,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:38:48,145 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:38:48,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 05:38:48,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:38:48,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:38:48,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:38:48,934 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 05:38:48,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:38:49,381 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 05:38:49,382 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:38:49,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [318472399] [2021-11-03 05:38:49,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [318472399] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:38:49,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:38:49,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 05:38:49,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344697796] [2021-11-03 05:38:49,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:38:49,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:38:49,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:38:49,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:38:49,384 INFO L87 Difference]: Start difference. First operand 774 states and 852 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:38:49,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:38:49,519 INFO L93 Difference]: Finished difference Result 984 states and 1079 transitions. [2021-11-03 05:38:49,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:38:49,519 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-03 05:38:49,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:38:49,525 INFO L225 Difference]: With dead ends: 984 [2021-11-03 05:38:49,525 INFO L226 Difference]: Without dead ends: 984 [2021-11-03 05:38:49,525 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 111 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 05:38:49,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2021-11-03 05:38:49,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 919. [2021-11-03 05:38:49,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 611 states have (on average 1.7528641571194763) internal successors, (1071), 918 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states 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 05:38:49,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1071 transitions. [2021-11-03 05:38:49,548 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1071 transitions. Word has length 57 [2021-11-03 05:38:49,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:38:49,550 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1071 transitions. [2021-11-03 05:38:49,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:38:49,551 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1071 transitions. [2021-11-03 05:38:49,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 05:38:49,554 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:38:49,554 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 05:38:49,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 05:38:49,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:38:49,767 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 431 more)] === [2021-11-03 05:38:49,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:38:49,767 INFO L85 PathProgramCache]: Analyzing trace with hash -531678063, now seen corresponding path program 1 times [2021-11-03 05:38:49,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:38:49,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1291223738] [2021-11-03 05:38:49,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:38:49,768 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:38:49,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:38:49,769 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:38:49,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 05:38:50,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:38:50,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 05:38:50,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:38:50,242 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 05:38:50,251 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 05:38:51,018 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-03 05:38:51,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-11-03 05:38:51,037 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-03 05:38:51,037 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 05:38:51,078 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 05:38:51,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:38:55,977 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 05:38:55,978 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:38:55,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1291223738] [2021-11-03 05:38:55,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1291223738] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:38:55,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:38:55,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 05:38:55,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34815484] [2021-11-03 05:38:55,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:38:55,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:38:55,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:38:55,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-03 05:38:55,980 INFO L87 Difference]: Start difference. First operand 919 states and 1071 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 05:39:07,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:39:07,583 INFO L93 Difference]: Finished difference Result 1213 states and 1463 transitions. [2021-11-03 05:39:07,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:39:07,584 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 05:39:07,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:39:07,591 INFO L225 Difference]: With dead ends: 1213 [2021-11-03 05:39:07,591 INFO L226 Difference]: Without dead ends: 1213 [2021-11-03 05:39:07,592 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=26, Invalid=28, Unknown=2, NotChecked=0, Total=56 [2021-11-03 05:39:07,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2021-11-03 05:39:07,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 881. [2021-11-03 05:39:07,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 611 states have (on average 1.690671031096563) internal successors, (1033), 880 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states 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 05:39:07,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 1033 transitions. [2021-11-03 05:39:07,614 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 1033 transitions. Word has length 60 [2021-11-03 05:39:07,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:39:07,615 INFO L470 AbstractCegarLoop]: Abstraction has 881 states and 1033 transitions. [2021-11-03 05:39:07,615 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 05:39:07,616 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 1033 transitions. [2021-11-03 05:39:07,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-03 05:39:07,620 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:39:07,621 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 05:39:07,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 05:39:07,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:39:07,835 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr76ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 431 more)] === [2021-11-03 05:39:07,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:39:07,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1426362414, now seen corresponding path program 1 times [2021-11-03 05:39:07,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:39:07,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1824491526] [2021-11-03 05:39:07,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:39:07,837 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:39:07,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:39:07,838 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:39:07,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 05:39:08,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:39:08,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:39:08,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:39:08,464 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 05:39:08,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-03 05:39:08,530 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 26 treesize of output 14 [2021-11-03 05:39:08,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:39:08,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:39:08,721 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 05:39:08,721 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:39:08,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1824491526] [2021-11-03 05:39:08,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1824491526] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:39:08,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:39:08,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 05:39:08,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920768259] [2021-11-03 05:39:08,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:39:08,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:39:08,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:39:08,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:39:08,723 INFO L87 Difference]: Start difference. First operand 881 states and 1033 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 05:39:12,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:39:12,769 INFO L93 Difference]: Finished difference Result 1416 states and 1672 transitions. [2021-11-03 05:39:12,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-03 05:39:12,769 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 05:39:12,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:39:12,775 INFO L225 Difference]: With dead ends: 1416 [2021-11-03 05:39:12,775 INFO L226 Difference]: Without dead ends: 1416 [2021-11-03 05:39:12,777 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 122 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-03 05:39:12,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1416 states. [2021-11-03 05:39:12,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1416 to 880. [2021-11-03 05:39:12,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 611 states have (on average 1.6890343698854338) internal successors, (1032), 879 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states 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 05:39:12,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1032 transitions. [2021-11-03 05:39:12,798 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1032 transitions. Word has length 66 [2021-11-03 05:39:12,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:39:12,799 INFO L470 AbstractCegarLoop]: Abstraction has 880 states and 1032 transitions. [2021-11-03 05:39:12,799 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 05:39:12,799 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1032 transitions. [2021-11-03 05:39:12,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-03 05:39:12,802 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:39:12,802 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 05:39:12,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 05:39:13,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:39:13,016 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr77ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 431 more)] === [2021-11-03 05:39:13,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:39:13,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1267561538, now seen corresponding path program 1 times [2021-11-03 05:39:13,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:39:13,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [819717139] [2021-11-03 05:39:13,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:39:13,017 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:39:13,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:39:13,018 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:39:13,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 05:39:13,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:39:13,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 05:39:13,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:39:13,673 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 05:39:13,696 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 05:39:13,703 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 05:39:13,769 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 05:39:13,772 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 05:39:13,841 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 05:39:13,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:39:14,359 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 05:39:14,360 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:39:14,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [819717139] [2021-11-03 05:39:14,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [819717139] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:39:14,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:39:14,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-03 05:39:14,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064465092] [2021-11-03 05:39:14,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 05:39:14,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:39:14,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 05:39:14,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:39:14,365 INFO L87 Difference]: Start difference. First operand 880 states and 1032 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 05:39:25,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:39:25,424 INFO L93 Difference]: Finished difference Result 1251 states and 1469 transitions. [2021-11-03 05:39:25,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-03 05:39:25,425 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 05:39:25,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:39:25,430 INFO L225 Difference]: With dead ends: 1251 [2021-11-03 05:39:25,430 INFO L226 Difference]: Without dead ends: 1251 [2021-11-03 05:39:25,430 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 05:39:25,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2021-11-03 05:39:25,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 879. [2021-11-03 05:39:25,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 611 states have (on average 1.6873977086743044) internal successors, (1031), 878 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states 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 05:39:25,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1031 transitions. [2021-11-03 05:39:25,455 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1031 transitions. Word has length 67 [2021-11-03 05:39:25,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:39:25,455 INFO L470 AbstractCegarLoop]: Abstraction has 879 states and 1031 transitions. [2021-11-03 05:39:25,456 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 05:39:25,456 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1031 transitions. [2021-11-03 05:39:25,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-03 05:39:25,457 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:39:25,457 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 05:39:25,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-03 05:39:25,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:39:25,690 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 431 more)] === [2021-11-03 05:39:25,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:39:25,690 INFO L85 PathProgramCache]: Analyzing trace with hash -582276570, now seen corresponding path program 1 times [2021-11-03 05:39:25,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:39:25,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1527589364] [2021-11-03 05:39:25,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:39:25,691 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:39:25,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:39:25,692 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:39:25,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 05:39:26,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:39:26,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:39:26,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:39:26,341 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 05:39:26,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:39:26,468 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 05:39:26,468 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:39:26,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1527589364] [2021-11-03 05:39:26,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1527589364] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:39:26,469 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:39:26,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:39:26,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973983666] [2021-11-03 05:39:26,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:39:26,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:39:26,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:39:26,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:39:26,471 INFO L87 Difference]: Start difference. First operand 879 states and 1031 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 05:39:26,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:39:26,600 INFO L93 Difference]: Finished difference Result 1409 states and 1663 transitions. [2021-11-03 05:39:26,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:39:26,601 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 05:39:26,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:39:26,607 INFO L225 Difference]: With dead ends: 1409 [2021-11-03 05:39:26,607 INFO L226 Difference]: Without dead ends: 1409 [2021-11-03 05:39:26,607 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 05:39:26,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1409 states. [2021-11-03 05:39:26,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1409 to 882. [2021-11-03 05:39:26,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 614 states have (on average 1.6840390879478828) internal successors, (1034), 881 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states 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 05:39:26,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 1034 transitions. [2021-11-03 05:39:26,635 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 1034 transitions. Word has length 71 [2021-11-03 05:39:26,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:39:26,635 INFO L470 AbstractCegarLoop]: Abstraction has 882 states and 1034 transitions. [2021-11-03 05:39:26,635 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 05:39:26,635 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 1034 transitions. [2021-11-03 05:39:26,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-03 05:39:26,636 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:39:26,636 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 05:39:26,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-03 05:39:26,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:39:26,851 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 431 more)] === [2021-11-03 05:39:26,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:39:26,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1283072730, now seen corresponding path program 1 times [2021-11-03 05:39:26,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:39:26,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1987540807] [2021-11-03 05:39:26,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:39:26,853 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:39:26,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:39:26,854 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:39:26,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 05:39:27,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:39:27,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:39:27,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:39:27,631 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 05:39:27,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:39:27,876 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 05:39:27,876 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:39:27,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1987540807] [2021-11-03 05:39:27,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1987540807] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:39:27,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1299308013] [2021-11-03 05:39:27,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:39:27,877 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:39:27,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:39:27,892 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:39:27,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-03 05:39:28,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:39:28,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:39:28,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:39:28,817 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 05:39:28,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:39:28,962 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 05:39:28,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1299308013] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:39:28,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889090754] [2021-11-03 05:39:28,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:39:28,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:39:28,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:39:28,969 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:39:28,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-03 05:39:29,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:39:29,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:39:29,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:39:29,762 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 05:39:29,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:39:29,881 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 05:39:29,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889090754] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:39:29,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 05:39:29,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2021-11-03 05:39:29,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493271271] [2021-11-03 05:39:29,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 05:39:29,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:39:29,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 05:39:29,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:39:29,883 INFO L87 Difference]: Start difference. First operand 882 states and 1034 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 05:39:30,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:39:30,306 INFO L93 Difference]: Finished difference Result 1415 states and 1669 transitions. [2021-11-03 05:39:30,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 05:39:30,307 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 05:39:30,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:39:30,312 INFO L225 Difference]: With dead ends: 1415 [2021-11-03 05:39:30,312 INFO L226 Difference]: Without dead ends: 1415 [2021-11-03 05:39:30,312 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 424 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-11-03 05:39:30,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2021-11-03 05:39:30,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 888. [2021-11-03 05:39:30,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 620 states have (on average 1.6774193548387097) internal successors, (1040), 887 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states 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 05:39:30,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1040 transitions. [2021-11-03 05:39:30,330 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1040 transitions. Word has length 73 [2021-11-03 05:39:30,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:39:30,330 INFO L470 AbstractCegarLoop]: Abstraction has 888 states and 1040 transitions. [2021-11-03 05:39:30,330 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 05:39:30,331 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1040 transitions. [2021-11-03 05:39:30,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-03 05:39:30,331 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:39:30,332 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 05:39:30,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-03 05:39:30,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-03 05:39:30,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-03 05:39:30,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:39:30,936 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 431 more)] === [2021-11-03 05:39:30,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:39:30,936 INFO L85 PathProgramCache]: Analyzing trace with hash -376896730, now seen corresponding path program 2 times [2021-11-03 05:39:30,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:39:30,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [302367957] [2021-11-03 05:39:30,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 05:39:30,937 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:39:30,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:39:30,938 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:39:30,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-03 05:39:31,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 05:39:31,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:39:31,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 05:39:31,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:39:32,159 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:39:32,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:39:32,772 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 05:39:32,772 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:39:32,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [302367957] [2021-11-03 05:39:32,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [302367957] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:39:32,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1181229603] [2021-11-03 05:39:32,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 05:39:32,773 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:39:32,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:39:32,774 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:39:32,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-03 05:39:34,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 05:39:34,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:39:34,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 05:39:34,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:39:34,390 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 05:39:34,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:39:34,545 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 05:39:34,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1181229603] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:39:34,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396316228] [2021-11-03 05:39:34,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 05:39:34,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:39:34,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:39:34,558 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:39:34,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-03 05:40:01,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 05:40:01,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:40:01,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-03 05:40:01,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:40:01,987 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-03 05:40:01,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-03 05:40:01,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 05:40:02,057 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 05:40:02,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-03 05:40:02,445 INFO L354 Elim1Store]: treesize reduction 37, result has 19.6 percent of original size [2021-11-03 05:40:02,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 67 [2021-11-03 05:40:02,473 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-03 05:40:02,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 51 [2021-11-03 05:40:03,751 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-03 05:40:03,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 90 [2021-11-03 05:40:04,471 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-03 05:40:04,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 74 [2021-11-03 05:40:05,242 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-03 05:40:05,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 90 [2021-11-03 05:40:05,902 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-03 05:40:05,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 74 [2021-11-03 05:40:07,760 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-03 05:40:07,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 90 [2021-11-03 05:40:07,809 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-03 05:40:07,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 74 [2021-11-03 05:40:09,194 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-03 05:40:09,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 90 [2021-11-03 05:40:13,536 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-03 05:40:13,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 74 [2021-11-03 05:40:13,793 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-03 05:40:13,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 115 treesize of output 78 [2021-11-03 05:40:15,355 INFO L354 Elim1Store]: treesize reduction 104, result has 19.4 percent of original size [2021-11-03 05:40:15,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 101 [2021-11-03 05:40:15,781 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-03 05:40:15,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 113 treesize of output 62 [2021-11-03 05:40:15,800 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-03 05:40:15,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 26 [2021-11-03 05:40:15,869 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-03 05:40:15,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:40:38,530 WARN L207 SmtUtils]: Spent 6.94 s on a formula simplification that was a NOOP. DAG size: 46 [2021-11-03 05:41:34,927 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_subst_10 (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#ptr.offset| (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#t~loopctr194| (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#value| (_ BitVec 32))) (let ((.cse0 (let ((.cse3 (bvadd (_ bv8 32) c_ULTIMATE.start_main_~user~0.offset))) (select (select (let ((.cse1 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~user~0.base) .cse3))) (store |c_#memory_$Pointer$.offset| .cse1 (let ((.cse2 ((_ zero_extend 24) ((_ extract 7 0) |ULTIMATE.start_#Ultimate.C_memset_#value|)))) (store (store (select |c_#memory_$Pointer$.offset| .cse1) (bvadd |ULTIMATE.start_#Ultimate.C_memset_#t~loopctr194| |ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) .cse2) (bvadd v_subst_10 |ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) .cse2)))) c_ULTIMATE.start_main_~user~0.base) .cse3)))) (bvule (bvadd (_ bv16 32) .cse0) (bvadd .cse0 (_ bv20 32))))) (forall ((|ULTIMATE.start_#Ultimate.C_memset_#ptr.offset| (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#t~loopctr194| (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#value| (_ BitVec 32)) (v_subst_9 (_ BitVec 32))) (let ((.cse8 (bvadd (_ bv8 32) c_ULTIMATE.start_main_~user~0.offset))) (let ((.cse4 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~user~0.base) .cse8)) (.cse5 (bvadd |ULTIMATE.start_#Ultimate.C_memset_#t~loopctr194| |ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|)) (.cse7 (bvadd v_subst_9 |ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| .cse4 (let ((.cse6 ((_ zero_extend 24) ((_ extract 7 0) |ULTIMATE.start_#Ultimate.C_memset_#value|)))) (store (store (select |c_#memory_$Pointer$.offset| .cse4) .cse5 .cse6) .cse7 .cse6))) c_ULTIMATE.start_main_~user~0.base) .cse8) (_ bv20 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse4 (store (store (select |c_#memory_$Pointer$.base| .cse4) .cse5 (_ bv0 32)) .cse7 (_ bv0 32))) c_ULTIMATE.start_main_~user~0.base) .cse8))))))) is different from false [2021-11-03 05:41:43,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2021-11-03 05:41:43,381 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 6 refuted. 8 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-03 05:41:43,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396316228] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:41:43,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 05:41:43,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 10] total 34 [2021-11-03 05:41:43,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091823592] [2021-11-03 05:41:43,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-03 05:41:43,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:41:43,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-03 05:41:43,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=891, Unknown=13, NotChecked=62, Total=1122 [2021-11-03 05:41:43,385 INFO L87 Difference]: Start difference. First operand 888 states and 1040 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states 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 05:41:51,639 WARN L838 $PredicateComparison]: unable to prove that (and (= (select |c_#length| |c_ULTIMATE.start_main_#t~mem42.base|) (_ bv44 32)) (forall ((v_subst_10 (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#ptr.offset| (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#t~loopctr194| (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#value| (_ BitVec 32))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base| (let ((.cse1 ((_ zero_extend 24) ((_ extract 7 0) |ULTIMATE.start_#Ultimate.C_memset_#value|)))) (store (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base|) (bvadd |ULTIMATE.start_#Ultimate.C_memset_#t~loopctr194| |ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) .cse1) (bvadd v_subst_10 |ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) .cse1))) c_ULTIMATE.start_main_~user~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_main_~user~0.offset)))) (bvule (bvadd (_ bv16 32) .cse0) (bvadd (_ bv20 32) .cse0)))) (= |c_ULTIMATE.start_#Ultimate.C_memset_#amount| (_ bv44 32)) (forall ((|ULTIMATE.start_#Ultimate.C_memset_#ptr.offset| (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#t~loopctr194| (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#value| (_ BitVec 32)) (v_subst_9 (_ BitVec 32))) (let ((.cse2 (bvadd |ULTIMATE.start_#Ultimate.C_memset_#t~loopctr194| |ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|)) (.cse4 (bvadd v_subst_9 |ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|)) (.cse5 (bvadd (_ bv8 32) c_ULTIMATE.start_main_~user~0.offset))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base| (let ((.cse3 ((_ zero_extend 24) ((_ extract 7 0) |ULTIMATE.start_#Ultimate.C_memset_#value|)))) (store (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base|) .cse2 .cse3) .cse4 .cse3))) c_ULTIMATE.start_main_~user~0.base) .cse5) (_ bv20 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base| (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base|) .cse2 (_ bv0 32)) .cse4 (_ bv0 32))) c_ULTIMATE.start_main_~user~0.base) .cse5))))) (= (_ bv0 32) |c_ULTIMATE.start_main_#t~mem42.offset|) (= (_ bv0 1) (bvadd (bvneg (bvneg (select |c_#valid| c_ULTIMATE.start_main_~user~0.base))) (_ bv1 1)))) is different from false [2021-11-03 05:42:14,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:42:14,054 INFO L93 Difference]: Finished difference Result 1755 states and 2109 transitions. [2021-11-03 05:42:14,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-03 05:42:14,055 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 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 05:42:14,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:42:14,063 INFO L225 Difference]: With dead ends: 1755 [2021-11-03 05:42:14,063 INFO L226 Difference]: Without dead ends: 1755 [2021-11-03 05:42:14,065 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 417 SyntacticMatches, 8 SemanticMatches, 67 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1236 ImplicationChecksByTransitivity, 87.6s TimeCoverageRelationStatistics Valid=932, Invalid=3484, Unknown=14, NotChecked=262, Total=4692 [2021-11-03 05:42:14,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1755 states. [2021-11-03 05:42:14,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1755 to 899. [2021-11-03 05:42:14,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 632 states have (on average 1.6629746835443038) internal successors, (1051), 898 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states 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 05:42:14,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1051 transitions. [2021-11-03 05:42:14,083 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1051 transitions. Word has length 77 [2021-11-03 05:42:14,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:42:14,083 INFO L470 AbstractCegarLoop]: Abstraction has 899 states and 1051 transitions. [2021-11-03 05:42:14,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states 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 05:42:14,084 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1051 transitions. [2021-11-03 05:42:14,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-03 05:42:14,085 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:42:14,085 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 05:42:14,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-03 05:42:14,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-03 05:42:14,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2021-11-03 05:42:14,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 05:42:14,701 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr80REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 431 more)] === [2021-11-03 05:42:14,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:42:14,702 INFO L85 PathProgramCache]: Analyzing trace with hash 688279333, now seen corresponding path program 1 times [2021-11-03 05:42:14,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:42:14,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [138630707] [2021-11-03 05:42:14,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:42:14,702 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:42:14,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:42:14,703 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:42:14,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-03 05:42:15,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:42:15,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 05:42:15,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:42:16,153 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 05:42:16,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:42:17,606 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 05:42:17,606 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:42:17,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [138630707] [2021-11-03 05:42:17,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [138630707] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:42:17,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2126493194] [2021-11-03 05:42:17,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:42:17,607 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:42:17,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:42:17,607 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:42:17,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-03 05:42:18,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:42:18,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 05:42:18,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:42:19,033 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 05:42:19,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:42:19,284 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 05:42:19,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2126493194] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:42:19,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709616972] [2021-11-03 05:42:19,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:42:19,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:42:19,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:42:19,289 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:42:19,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-03 05:42:20,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:42:20,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 05:42:20,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:42:20,485 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 05:42:20,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:42:20,664 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 05:42:20,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709616972] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:42:20,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 05:42:20,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18, 18, 18, 18] total 34 [2021-11-03 05:42:20,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484353998] [2021-11-03 05:42:20,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-03 05:42:20,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:42:20,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-03 05:42:20,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-11-03 05:42:20,667 INFO L87 Difference]: Start difference. First operand 899 states and 1051 transitions. Second operand has 34 states, 34 states have (on average 3.0294117647058822) internal successors, (103), 34 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 05:42:34,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:42:34,511 INFO L93 Difference]: Finished difference Result 1450 states and 1704 transitions. [2021-11-03 05:42:34,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-03 05:42:34,512 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.0294117647058822) internal successors, (103), 34 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-03 05:42:34,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:42:34,519 INFO L225 Difference]: With dead ends: 1450 [2021-11-03 05:42:34,520 INFO L226 Difference]: Without dead ends: 1450 [2021-11-03 05:42:34,521 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 915 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=1446, Invalid=2586, Unknown=0, NotChecked=0, Total=4032 [2021-11-03 05:42:34,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1450 states. [2021-11-03 05:42:34,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1450 to 923. [2021-11-03 05:42:34,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 656 states have (on average 1.638719512195122) internal successors, (1075), 922 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states 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 05:42:34,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1075 transitions. [2021-11-03 05:42:34,539 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1075 transitions. Word has length 85 [2021-11-03 05:42:34,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:42:34,540 INFO L470 AbstractCegarLoop]: Abstraction has 923 states and 1075 transitions. [2021-11-03 05:42:34,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.0294117647058822) internal successors, (103), 34 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 05:42:34,540 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1075 transitions. [2021-11-03 05:42:34,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-03 05:42:34,541 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:42:34,542 INFO L513 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:42:34,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2021-11-03 05:42:34,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-03 05:42:34,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-03 05:42:35,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:42:35,147 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr80REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 431 more)] === [2021-11-03 05:42:35,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:42:35,148 INFO L85 PathProgramCache]: Analyzing trace with hash -2300123, now seen corresponding path program 2 times [2021-11-03 05:42:35,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:42:35,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1971863693] [2021-11-03 05:42:35,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 05:42:35,149 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:42:35,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:42:35,150 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:42:35,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-03 05:42:36,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 05:42:36,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:42:36,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-03 05:42:36,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:42:37,940 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:42:37,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:42:42,031 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:42:42,031 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:42:42,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1971863693] [2021-11-03 05:42:42,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1971863693] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:42:42,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [448416658] [2021-11-03 05:42:42,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 05:42:42,032 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:42:42,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:42:42,033 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:42:42,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-03 05:42:43,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 05:42:43,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:42:43,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-03 05:42:43,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:42:44,200 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:42:44,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:42:44,491 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:42:44,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [448416658] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:42:44,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949576023] [2021-11-03 05:42:44,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 05:42:44,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:42:44,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:42:44,493 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:42:44,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e98c95fa-ea8a-427f-b6c4-2eef71cbd722/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-03 05:42:54,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 05:42:54,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:42:54,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-03 05:42:54,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:42:54,651 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-03 05:42:54,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-03 05:42:54,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-03 05:42:55,468 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-03 05:42:55,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 26 [2021-11-03 05:42:57,175 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:42:57,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:42:57,533 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:42:57,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:42:58,215 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:42:58,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:42:59,356 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:42:59,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:43:00,348 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:43:00,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:43:00,630 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:43:00,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:43:02,984 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:43:02,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:43:04,777 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:43:04,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:43:05,040 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:43:05,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:43:07,542 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:43:07,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:43:09,182 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:43:09,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:43:09,479 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:43:09,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:43:10,336 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:43:10,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:43:13,320 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:43:13,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:43:13,607 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:43:13,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:43:14,699 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:43:14,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:43:16,779 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:43:16,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:43:18,720 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:43:18,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:43:20,186 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:43:20,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:43:21,548 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:43:21,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:43:21,814 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:43:21,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:43:22,165 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:43:22,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:43:22,431 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:43:22,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:43:22,700 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:43:22,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:43:23,445 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:43:23,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:43:23,715 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:43:23,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:43:23,990 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:43:23,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:43:24,288 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 05:43:24,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 05:43:25,209 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-03 05:43:25,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 47 [2021-11-03 05:43:25,580 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-03 05:43:25,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 27 [2021-11-03 05:43:25,698 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 29 proven. 30 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2021-11-03 05:43:25,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:43:27,971 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_#Ultimate.C_memset_#t~loopctr194| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base|) (bvadd |ULTIMATE.start_#Ultimate.C_memset_#t~loopctr194| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) (_ bv0 32))) c_ULTIMATE.start_main_~user~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_main_~user~0.offset)))))))))) (_ bv1 1)))) is different from false [2021-11-03 05:44:48,389 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr194_316| (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#t~loopctr194| (_ BitVec 32)) (|v_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr194_312| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base| (store (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base|) (bvadd |ULTIMATE.start_#Ultimate.C_memset_#t~loopctr194| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) (_ bv0 32)) (bvadd |v_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr194_316| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) (_ bv0 32)) (bvadd |v_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr194_312| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) (_ bv0 32))) c_ULTIMATE.start_main_~user~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_main_~user~0.offset)))))))))))) (_ bv1 1)))) is different from false [2021-11-03 05:47:32,100 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr194_316| (_ BitVec 32)) (|v_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr194_318| (_ BitVec 32)) (|v_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr194_350| (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#t~loopctr194| (_ BitVec 32)) (|v_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr194_312| (_ BitVec 32))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base| (store (store (store (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base|) (bvadd |ULTIMATE.start_#Ultimate.C_memset_#t~loopctr194| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) (_ bv0 32)) (bvadd |v_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr194_350| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) (_ bv0 32)) (bvadd |v_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr194_318| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) (_ bv0 32)) (bvadd |v_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr194_316| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) (_ bv0 32)) (bvadd |v_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr194_312| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) (_ bv0 32))) c_ULTIMATE.start_main_~user~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_main_~user~0.offset))))))))))))))))) is different from false [2021-11-03 05:47:57,002 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr194_316| (_ BitVec 32)) (|v_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr194_318| (_ BitVec 32)) (|v_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr194_360| (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#t~loopctr194| (_ BitVec 32)) (|v_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr194_312| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base| (store (store (store (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base|) (bvadd |ULTIMATE.start_#Ultimate.C_memset_#t~loopctr194| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) (_ bv0 32)) (bvadd |v_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr194_360| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) (_ bv0 32)) (bvadd |v_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr194_318| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) (_ bv0 32)) (bvadd |v_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr194_316| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) (_ bv0 32)) (bvadd |v_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr194_312| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) (_ bv0 32))) c_ULTIMATE.start_main_~user~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_main_~user~0.offset)))))))))))))) (_ bv1 1)))) is different from false [2021-11-03 05:48:27,853 INFO L354 Elim1Store]: treesize reduction 5, result has 88.6 percent of original size [2021-11-03 05:48:27,853 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 66 treesize of output 65 [2021-11-03 05:48:38,323 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 26 refuted. 71 times theorem prover too weak. 254 trivial. 114 not checked. [2021-11-03 05:48:38,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949576023] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:48:38,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 05:48:38,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34, 34, 10, 15] total 88 [2021-11-03 05:48:38,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373040791] [2021-11-03 05:48:38,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2021-11-03 05:48:38,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:48:38,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-11-03 05:48:38,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1077, Invalid=5859, Unknown=52, NotChecked=668, Total=7656 [2021-11-03 05:48:38,328 INFO L87 Difference]: Start difference. First operand 923 states and 1075 transitions. Second operand has 88 states, 88 states have (on average 3.1363636363636362) internal successors, (276), 88 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 05:50:28,948 WARN L207 SmtUtils]: Spent 12.45 s on a formula simplification. DAG size of input: 100 DAG size of output: 83 [2021-11-03 05:50:41,411 WARN L207 SmtUtils]: Spent 10.52 s on a formula simplification. DAG size of input: 92 DAG size of output: 75