./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4d1a05335dcd475270df3d2b7e447bf62801b1b41377a4a2d9fc94b2523fc1ec --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:13:50,788 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:13:50,791 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:13:50,846 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:13:50,847 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:13:50,852 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:13:50,854 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:13:50,859 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:13:50,861 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:13:50,869 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:13:50,870 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:13:50,872 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:13:50,873 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:13:50,875 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:13:50,877 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:13:50,883 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:13:50,885 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:13:50,887 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:13:50,889 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:13:50,893 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:13:50,899 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:13:50,901 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:13:50,904 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:13:50,905 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:13:50,911 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:13:50,912 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:13:50,912 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:13:50,914 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:13:50,915 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:13:50,916 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:13:50,917 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:13:50,918 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:13:50,920 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:13:50,921 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:13:50,922 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:13:50,922 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:13:50,923 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:13:50,924 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:13:50,924 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:13:50,925 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:13:50,926 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:13:50,926 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:13:50,971 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:13:50,971 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:13:50,973 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:13:50,973 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:13:50,973 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:13:50,974 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:13:50,974 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:13:50,974 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:13:50,974 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:13:50,974 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:13:50,975 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:13:50,976 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:13:50,976 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:13:50,976 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:13:50,976 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:13:50,977 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:13:50,977 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:13:50,978 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:13:50,978 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:13:50,978 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:13:50,978 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:13:50,978 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:13:50,979 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:13:50,979 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:13:50,979 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:13:50,979 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:13:50,979 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:13:50,980 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:13:50,980 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:13:50,980 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:13:50,980 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:13:50,981 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:13:50,981 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:13:50,981 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:13:50,982 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:13:50,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:13:50,982 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:13:50,982 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:13:50,982 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:13:50,983 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_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d1a05335dcd475270df3d2b7e447bf62801b1b41377a4a2d9fc94b2523fc1ec [2021-11-07 01:13:51,241 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:13:51,263 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:13:51,265 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:13:51,267 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:13:51,267 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:13:51,268 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c [2021-11-07 01:13:51,332 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/data/6602da333/6f112084c4a04c0295a7e155359be0af/FLAG041c43376 [2021-11-07 01:13:51,933 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:13:51,934 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c [2021-11-07 01:13:51,962 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/data/6602da333/6f112084c4a04c0295a7e155359be0af/FLAG041c43376 [2021-11-07 01:13:52,152 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/data/6602da333/6f112084c4a04c0295a7e155359be0af [2021-11-07 01:13:52,155 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:13:52,156 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:13:52,158 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:13:52,158 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:13:52,161 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:13:52,162 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:13:52" (1/1) ... [2021-11-07 01:13:52,163 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71a6dbdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:52, skipping insertion in model container [2021-11-07 01:13:52,163 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:13:52" (1/1) ... [2021-11-07 01:13:52,171 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:13:52,247 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:13:52,715 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_e5434577-7863-45ee-b1c5-edfcde0d513b/sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c[75550,75563] [2021-11-07 01:13:52,723 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:13:52,737 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:13:52,738 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4f603112 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:52, skipping insertion in model container [2021-11-07 01:13:52,738 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:13:52,739 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:13:52,741 INFO L168 Benchmark]: Toolchain (without parser) took 583.37 ms. Allocated memory is still 92.3 MB. Free memory was 69.0 MB in the beginning and 57.1 MB in the end (delta: 11.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 01:13:52,742 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 92.3 MB. Free memory is still 67.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:13:52,742 INFO L168 Benchmark]: CACSL2BoogieTranslator took 580.98 ms. Allocated memory is still 92.3 MB. Free memory was 68.7 MB in the beginning and 57.1 MB in the end (delta: 11.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 01:13:52,745 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 92.3 MB. Free memory is still 67.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 580.98 ms. Allocated memory is still 92.3 MB. Free memory was 68.7 MB in the beginning and 57.1 MB in the end (delta: 11.6 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: 1050]: 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_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4d1a05335dcd475270df3d2b7e447bf62801b1b41377a4a2d9fc94b2523fc1ec --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:13:55,048 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:13:55,050 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:13:55,081 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:13:55,082 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:13:55,083 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:13:55,085 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:13:55,087 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:13:55,089 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:13:55,091 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:13:55,092 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:13:55,093 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:13:55,094 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:13:55,095 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:13:55,097 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:13:55,098 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:13:55,099 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:13:55,101 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:13:55,103 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:13:55,105 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:13:55,107 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:13:55,118 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:13:55,120 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:13:55,121 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:13:55,126 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:13:55,130 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:13:55,130 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:13:55,135 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:13:55,137 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:13:55,138 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:13:55,139 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:13:55,140 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:13:55,142 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:13:55,144 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:13:55,153 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:13:55,153 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:13:55,154 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:13:55,154 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:13:55,155 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:13:55,155 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:13:55,156 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:13:55,157 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:13:55,183 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:13:55,184 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:13:55,186 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:13:55,186 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:13:55,186 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:13:55,186 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:13:55,187 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:13:55,187 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:13:55,187 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:13:55,189 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:13:55,190 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:13:55,190 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:13:55,190 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:13:55,191 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:13:55,191 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:13:55,191 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:13:55,191 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:13:55,192 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:13:55,192 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:13:55,192 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:13:55,192 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:13:55,192 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:13:55,193 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:13:55,193 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:13:55,193 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:13:55,193 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:13:55,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:13:55,194 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:13:55,194 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:13:55,195 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:13:55,195 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:13:55,195 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:13:55,195 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:13:55,196 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:13:55,196 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:13:55,196 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_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d1a05335dcd475270df3d2b7e447bf62801b1b41377a4a2d9fc94b2523fc1ec [2021-11-07 01:13:55,580 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:13:55,606 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:13:55,610 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:13:55,611 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:13:55,612 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:13:55,613 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c [2021-11-07 01:13:55,685 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/data/6adfa414b/5072fe61e9f24ae8a55b8605dc193903/FLAGa58d6d765 [2021-11-07 01:13:56,395 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:13:56,395 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c [2021-11-07 01:13:56,424 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/data/6adfa414b/5072fe61e9f24ae8a55b8605dc193903/FLAGa58d6d765 [2021-11-07 01:13:56,650 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/data/6adfa414b/5072fe61e9f24ae8a55b8605dc193903 [2021-11-07 01:13:56,653 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:13:56,655 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:13:56,657 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:13:56,657 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:13:56,661 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:13:56,661 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:13:56" (1/1) ... [2021-11-07 01:13:56,663 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50c82675 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:56, skipping insertion in model container [2021-11-07 01:13:56,663 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:13:56" (1/1) ... [2021-11-07 01:13:56,682 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:13:56,758 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:13:57,257 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_e5434577-7863-45ee-b1c5-edfcde0d513b/sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c[75550,75563] [2021-11-07 01:13:57,272 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:13:57,315 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:13:57,342 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:13:57,524 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_e5434577-7863-45ee-b1c5-edfcde0d513b/sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c[75550,75563] [2021-11-07 01:13:57,527 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:13:57,534 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:13:57,635 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_e5434577-7863-45ee-b1c5-edfcde0d513b/sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c[75550,75563] [2021-11-07 01:13:57,637 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:13:57,656 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:13:57,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:57 WrapperNode [2021-11-07 01:13:57,656 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:13:57,658 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:13:57,658 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:13:57,658 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:13:57,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:57" (1/1) ... [2021-11-07 01:13:57,692 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:57" (1/1) ... [2021-11-07 01:13:57,755 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:13:57,762 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:13:57,763 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:13:57,764 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:13:57,772 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:57" (1/1) ... [2021-11-07 01:13:57,772 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:57" (1/1) ... [2021-11-07 01:13:57,794 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:57" (1/1) ... [2021-11-07 01:13:57,801 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:57" (1/1) ... [2021-11-07 01:13:57,862 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:57" (1/1) ... [2021-11-07 01:13:57,876 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:57" (1/1) ... [2021-11-07 01:13:57,879 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:57" (1/1) ... [2021-11-07 01:13:57,899 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:13:57,900 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:13:57,900 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:13:57,900 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:13:57,901 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:57" (1/1) ... [2021-11-07 01:13:57,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:13:57,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:13:57,936 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:13:57,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:13:58,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:13:58,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 01:13:58,015 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:13:58,015 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 01:13:58,015 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 01:13:58,015 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:13:58,015 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:13:58,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:13:58,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 01:13:58,252 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-07 01:14:07,222 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-07 01:14:07,223 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-07 01:14:07,231 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:14:07,231 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-07 01:14:07,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:14:07 BoogieIcfgContainer [2021-11-07 01:14:07,234 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:14:07,236 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:14:07,236 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:14:07,239 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:14:07,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:13:56" (1/3) ... [2021-11-07 01:14:07,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5add64b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:14:07, skipping insertion in model container [2021-11-07 01:14:07,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:57" (2/3) ... [2021-11-07 01:14:07,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5add64b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:14:07, skipping insertion in model container [2021-11-07 01:14:07,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:14:07" (3/3) ... [2021-11-07 01:14:07,242 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.15.i.cil-1.c [2021-11-07 01:14:07,247 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:14:07,247 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:14:07,293 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:14:07,299 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:14:07,299 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 01:14:07,317 INFO L276 IsEmpty]: Start isEmpty. Operand has 153 states, 151 states have (on average 1.7218543046357615) internal successors, (260), 152 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:07,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 01:14:07,326 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:07,327 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] [2021-11-07 01:14:07,327 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:14:07,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:07,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1630857892, now seen corresponding path program 1 times [2021-11-07 01:14:07,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:07,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1329841051] [2021-11-07 01:14:07,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:07,348 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:07,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:07,351 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:07,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:14:07,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:07,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 01:14:07,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:07,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 01:14:07,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 01:14:07,923 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:14:07,926 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-07 01:14:07,934 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:14:07,937 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-11-07 01:14:07,954 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 0 case distinctions, treesize of input 336 treesize of output 319 [2021-11-07 01:14:08,465 INFO L354 Elim1Store]: treesize reduction 1607, result has 2.8 percent of original size [2021-11-07 01:14:08,466 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 8 case distinctions, treesize of input 717 treesize of output 669 [2021-11-07 01:14:08,524 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:14:08,527 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-07 01:14:08,537 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 0 case distinctions, treesize of input 221 treesize of output 210 [2021-11-07 01:14:08,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 36 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 101 [2021-11-07 01:14:08,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 13 [2021-11-07 01:14:08,832 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-07 01:14:08,832 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 4 case distinctions, treesize of input 62 treesize of output 13 [2021-11-07 01:14:08,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:08,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 13 [2021-11-07 01:14:08,934 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 37 treesize of output 25 [2021-11-07 01:14:08,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-07 01:14:09,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:09,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:09,398 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:14:09,404 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-11-07 01:14:09,411 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:14:09,418 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-07 01:14:09,586 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:14:09,588 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 393 [2021-11-07 01:14:09,596 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:14:09,601 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 510 [2021-11-07 01:14:09,621 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:14:09,624 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 687 [2021-11-07 01:14:09,644 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:14:09,648 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 744 [2021-11-07 01:14:09,674 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:14:09,679 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 861 [2021-11-07 01:14:09,710 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:14:09,715 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1038 [2021-11-07 01:14:10,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:10,253 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:10,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1329841051] [2021-11-07 01:14:10,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1329841051] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:10,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:14:10,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:14:10,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902413909] [2021-11-07 01:14:10,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:14:10,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:10,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:14:10,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:14:10,286 INFO L87 Difference]: Start difference. First operand has 153 states, 151 states have (on average 1.7218543046357615) internal successors, (260), 152 states have internal predecessors, (260), 0 states have call successors, (0), 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 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:24,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:24,093 INFO L93 Difference]: Finished difference Result 307 states and 519 transitions. [2021-11-07 01:14:24,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:14:24,096 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-07 01:14:24,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:24,106 INFO L225 Difference]: With dead ends: 307 [2021-11-07 01:14:24,106 INFO L226 Difference]: Without dead ends: 140 [2021-11-07 01:14:24,110 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:14:24,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-07 01:14:24,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2021-11-07 01:14:24,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.5467625899280575) internal successors, (215), 139 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:24,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 215 transitions. [2021-11-07 01:14:24,154 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 215 transitions. Word has length 45 [2021-11-07 01:14:24,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:24,154 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 215 transitions. [2021-11-07 01:14:24,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:14:24,155 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 215 transitions. [2021-11-07 01:14:24,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 01:14:24,158 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:24,158 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] [2021-11-07 01:14:24,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:24,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:14:24,373 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:14:24,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:24,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1766716126, now seen corresponding path program 1 times [2021-11-07 01:14:24,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:24,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1925560219] [2021-11-07 01:14:24,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:24,375 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:24,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:24,379 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:24,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:14:24,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:24,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:14:24,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:24,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:24,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:24,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:24,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:24,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:14:24,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:14:25,223 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 01:14:25,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-07 01:14:28,763 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 01:14:28,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-07 01:14:36,674 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 01:14:36,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-07 01:14:36,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:36,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:45,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:14:45,086 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:45,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1925560219] [2021-11-07 01:14:45,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1925560219] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:45,087 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:14:45,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 6 [2021-11-07 01:14:45,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160638942] [2021-11-07 01:14:45,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:14:45,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:45,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:14:45,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=15, Unknown=3, NotChecked=0, Total=30 [2021-11-07 01:14:45,090 INFO L87 Difference]: Start difference. First operand 140 states and 215 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:15:14,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:15:14,345 INFO L93 Difference]: Finished difference Result 298 states and 458 transitions. [2021-11-07 01:15:14,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:15:14,347 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-07 01:15:14,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:15:14,349 INFO L225 Difference]: With dead ends: 298 [2021-11-07 01:15:14,349 INFO L226 Difference]: Without dead ends: 168 [2021-11-07 01:15:14,351 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=18, Invalid=21, Unknown=3, NotChecked=0, Total=42 [2021-11-07 01:15:14,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-07 01:15:14,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 151. [2021-11-07 01:15:14,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.56) internal successors, (234), 150 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:15:14,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 234 transitions. [2021-11-07 01:15:14,364 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 234 transitions. Word has length 45 [2021-11-07 01:15:14,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:15:14,365 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 234 transitions. [2021-11-07 01:15:14,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:15:14,365 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 234 transitions. [2021-11-07 01:15:14,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 01:15:14,368 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:15:14,368 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2021-11-07 01:15:14,378 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-07 01:15:14,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:15:14,573 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:15:14,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:15:14,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1817968786, now seen corresponding path program 1 times [2021-11-07 01:15:14,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:15:14,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [97308569] [2021-11-07 01:15:14,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:15:14,575 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:15:14,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:15:14,585 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:15:14,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:15:15,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:15:15,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:15:15,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:15:15,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:15:15,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:15:15,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:15:15,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:15:15,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:15:15,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:15:15,603 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 01:15:15,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-07 01:15:18,951 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 01:15:18,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-07 01:15:26,309 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 01:15:26,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-07 01:15:26,479 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:15:26,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:15:26,856 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:15:26,856 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:15:26,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [97308569] [2021-11-07 01:15:26,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [97308569] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:15:26,856 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:15:26,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:15:26,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543360581] [2021-11-07 01:15:26,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:15:26,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:15:26,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:15:26,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 01:15:26,858 INFO L87 Difference]: Start difference. First operand 151 states and 234 transitions. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:16:10,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:16:10,264 INFO L93 Difference]: Finished difference Result 417 states and 643 transitions. [2021-11-07 01:16:10,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:16:10,265 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 01:16:10,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:16:10,268 INFO L225 Difference]: With dead ends: 417 [2021-11-07 01:16:10,268 INFO L226 Difference]: Without dead ends: 287 [2021-11-07 01:16:10,269 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 01:16:10,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-11-07 01:16:10,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 167. [2021-11-07 01:16:10,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.5602409638554218) internal successors, (259), 166 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:16:10,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 259 transitions. [2021-11-07 01:16:10,288 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 259 transitions. Word has length 58 [2021-11-07 01:16:10,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:16:10,288 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 259 transitions. [2021-11-07 01:16:10,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:16:10,288 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 259 transitions. [2021-11-07 01:16:10,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 01:16:10,291 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:16:10,291 INFO L513 BasicCegarLoop]: trace histogram [2, 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] [2021-11-07 01:16:10,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:16:10,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:16:10,506 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:16:10,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:16:10,506 INFO L85 PathProgramCache]: Analyzing trace with hash 329403111, now seen corresponding path program 1 times [2021-11-07 01:16:10,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:16:10,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2084357570] [2021-11-07 01:16:10,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:16:10,508 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:16:10,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:16:10,510 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:16:10,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:16:11,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:16:11,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:16:11,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:16:11,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:16:11,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:16:11,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:16:11,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:16:11,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:16:11,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:16:11,558 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 01:16:11,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-07 01:16:14,900 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 01:16:14,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-07 01:16:21,647 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 01:16:21,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-07 01:16:21,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:16:21,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:16:22,176 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:16:22,177 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:16:22,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2084357570] [2021-11-07 01:16:22,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2084357570] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:16:22,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:16:22,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:16:22,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701354100] [2021-11-07 01:16:22,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:16:22,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:16:22,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:16:22,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 01:16:22,181 INFO L87 Difference]: Start difference. First operand 167 states and 259 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:13,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:17:13,509 INFO L93 Difference]: Finished difference Result 447 states and 692 transitions. [2021-11-07 01:17:13,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:17:13,510 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 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 59 [2021-11-07 01:17:13,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:17:13,512 INFO L225 Difference]: With dead ends: 447 [2021-11-07 01:17:13,512 INFO L226 Difference]: Without dead ends: 301 [2021-11-07 01:17:13,513 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 01:17:13,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-11-07 01:17:13,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 178. [2021-11-07 01:17:13,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.5423728813559323) internal successors, (273), 177 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:13,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 273 transitions. [2021-11-07 01:17:13,529 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 273 transitions. Word has length 59 [2021-11-07 01:17:13,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:17:13,530 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 273 transitions. [2021-11-07 01:17:13,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:13,530 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 273 transitions. [2021-11-07 01:17:13,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 01:17:13,532 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:17:13,533 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 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] [2021-11-07 01:17:13,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:17:13,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:17:13,741 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:17:13,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:17:13,741 INFO L85 PathProgramCache]: Analyzing trace with hash -2078660741, now seen corresponding path program 1 times [2021-11-07 01:17:13,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:17:13,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2056070636] [2021-11-07 01:17:13,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:13,743 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:17:13,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:17:13,748 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:17:13,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:17:14,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:14,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:17:14,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:17:14,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:17:14,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:17:14,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:17:14,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:17:14,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:17:14,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:17:14,872 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 01:17:14,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-07 01:17:18,185 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 01:17:18,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-07 01:17:25,121 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 01:17:25,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-07 01:17:25,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:25,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:17:25,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:25,580 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:17:25,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2056070636] [2021-11-07 01:17:25,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2056070636] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:17:25,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:17:25,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:17:25,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719920901] [2021-11-07 01:17:25,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:17:25,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:17:25,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:17:25,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 01:17:25,582 INFO L87 Difference]: Start difference. First operand 178 states and 273 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:58,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:17:58,147 INFO L93 Difference]: Finished difference Result 462 states and 710 transitions. [2021-11-07 01:17:58,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:17:58,149 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 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 59 [2021-11-07 01:17:58,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:17:58,151 INFO L225 Difference]: With dead ends: 462 [2021-11-07 01:17:58,151 INFO L226 Difference]: Without dead ends: 305 [2021-11-07 01:17:58,152 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 01:17:58,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-11-07 01:17:58,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 191. [2021-11-07 01:17:58,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.5263157894736843) internal successors, (290), 190 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:58,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 290 transitions. [2021-11-07 01:17:58,164 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 290 transitions. Word has length 59 [2021-11-07 01:17:58,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:17:58,165 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 290 transitions. [2021-11-07 01:17:58,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:58,165 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 290 transitions. [2021-11-07 01:17:58,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 01:17:58,168 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:17:58,168 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-07 01:17:58,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:17:58,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:17:58,381 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:17:58,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:17:58,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1364189778, now seen corresponding path program 1 times [2021-11-07 01:17:58,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:17:58,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1125636025] [2021-11-07 01:17:58,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:58,382 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:17:58,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:17:58,383 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:17:58,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:17:58,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:59,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:17:59,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:17:59,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:17:59,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:17:59,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:17:59,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:17:59,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:17:59,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:17:59,399 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 01:17:59,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-07 01:18:02,926 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 01:18:02,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-07 01:18:10,507 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 01:18:10,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-07 01:18:10,693 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:18:10,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:18:11,114 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:18:11,114 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:18:11,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1125636025] [2021-11-07 01:18:11,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1125636025] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:18:11,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:18:11,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:18:11,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242255452] [2021-11-07 01:18:11,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:18:11,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:18:11,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:18:11,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 01:18:11,117 INFO L87 Difference]: Start difference. First operand 191 states and 290 transitions. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 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) [2021-11-07 01:18:58,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:18:58,841 INFO L93 Difference]: Finished difference Result 497 states and 760 transitions. [2021-11-07 01:18:58,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:18:58,843 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 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 59 [2021-11-07 01:18:58,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:18:58,845 INFO L225 Difference]: With dead ends: 497 [2021-11-07 01:18:58,845 INFO L226 Difference]: Without dead ends: 327 [2021-11-07 01:18:58,846 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 01:18:58,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-11-07 01:18:58,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 215. [2021-11-07 01:18:58,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.52803738317757) internal successors, (327), 214 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:18:58,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 327 transitions. [2021-11-07 01:18:58,859 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 327 transitions. Word has length 59 [2021-11-07 01:18:58,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:18:58,860 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 327 transitions. [2021-11-07 01:18:58,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 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) [2021-11-07 01:18:58,860 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 327 transitions. [2021-11-07 01:18:58,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 01:18:58,864 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:18:58,865 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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] [2021-11-07 01:18:58,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:18:59,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:18:59,081 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:18:59,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:18:59,081 INFO L85 PathProgramCache]: Analyzing trace with hash -639030510, now seen corresponding path program 1 times [2021-11-07 01:18:59,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:18:59,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [479182313] [2021-11-07 01:18:59,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:18:59,082 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:18:59,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:18:59,083 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:18:59,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:18:59,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:18:59,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:18:59,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:18:59,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:18:59,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:18:59,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:18:59,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:18:59,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:18:59,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:19:00,221 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 01:19:00,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-07 01:19:03,561 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 01:19:03,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-07 01:19:10,931 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 01:19:10,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-07 01:19:11,079 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:11,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:19:11,400 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:11,400 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:19:11,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [479182313] [2021-11-07 01:19:11,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [479182313] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:11,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:11,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:19:11,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496835463] [2021-11-07 01:19:11,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:19:11,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:19:11,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:19:11,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 01:19:11,402 INFO L87 Difference]: Start difference. First operand 215 states and 327 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:53,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:53,424 INFO L93 Difference]: Finished difference Result 503 states and 769 transitions. [2021-11-07 01:19:53,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:19:53,426 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 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 59 [2021-11-07 01:19:53,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:53,428 INFO L225 Difference]: With dead ends: 503 [2021-11-07 01:19:53,428 INFO L226 Difference]: Without dead ends: 309 [2021-11-07 01:19:53,428 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 01:19:53,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-11-07 01:19:53,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 197. [2021-11-07 01:19:53,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.5204081632653061) internal successors, (298), 196 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:53,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 298 transitions. [2021-11-07 01:19:53,438 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 298 transitions. Word has length 59 [2021-11-07 01:19:53,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:53,438 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 298 transitions. [2021-11-07 01:19:53,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:53,439 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 298 transitions. [2021-11-07 01:19:53,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:19:53,440 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:53,440 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 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] [2021-11-07 01:19:53,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-07 01:19:53,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:19:53,656 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:19:53,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:53,656 INFO L85 PathProgramCache]: Analyzing trace with hash -623672389, now seen corresponding path program 1 times [2021-11-07 01:19:53,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:19:53,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1258790971] [2021-11-07 01:19:53,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:53,657 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:19:53,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:19:53,658 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:19:53,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:19:54,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:54,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:19:54,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:19:54,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:19:54,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:19:54,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:19:54,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:19:54,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:19:54,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:19:54,958 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 01:19:54,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-07 01:19:58,277 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 01:19:58,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-07 01:20:05,348 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 01:20:05,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-07 01:20:05,506 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:05,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:05,822 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:05,822 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:05,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1258790971] [2021-11-07 01:20:05,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1258790971] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:05,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:05,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:20:05,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705465299] [2021-11-07 01:20:05,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:20:05,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:05,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:20:05,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 01:20:05,824 INFO L87 Difference]: Start difference. First operand 197 states and 298 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:41,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:41,694 INFO L93 Difference]: Finished difference Result 507 states and 767 transitions. [2021-11-07 01:20:41,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:20:41,696 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 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 [2021-11-07 01:20:41,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:41,698 INFO L225 Difference]: With dead ends: 507 [2021-11-07 01:20:41,699 INFO L226 Difference]: Without dead ends: 331 [2021-11-07 01:20:41,699 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 01:20:41,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-11-07 01:20:41,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 220. [2021-11-07 01:20:41,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 1.4931506849315068) internal successors, (327), 219 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:41,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 327 transitions. [2021-11-07 01:20:41,710 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 327 transitions. Word has length 60 [2021-11-07 01:20:41,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:41,711 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 327 transitions. [2021-11-07 01:20:41,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:41,711 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 327 transitions. [2021-11-07 01:20:41,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:20:41,712 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:41,712 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 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] [2021-11-07 01:20:41,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:41,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:41,921 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:20:41,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:41,921 INFO L85 PathProgramCache]: Analyzing trace with hash -582997639, now seen corresponding path program 1 times [2021-11-07 01:20:41,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:41,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [430242980] [2021-11-07 01:20:41,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:41,922 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:41,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:41,923 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:41,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:20:42,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:42,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:20:42,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:42,800 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:42,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:43,064 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:43,064 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:43,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [430242980] [2021-11-07 01:20:43,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [430242980] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:43,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:43,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:20:43,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947614769] [2021-11-07 01:20:43,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:20:43,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:43,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:20:43,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:20:43,067 INFO L87 Difference]: Start difference. First operand 220 states and 327 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:43,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:43,135 INFO L93 Difference]: Finished difference Result 783 states and 1179 transitions. [2021-11-07 01:20:43,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:20:43,136 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 01:20:43,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:43,140 INFO L225 Difference]: With dead ends: 783 [2021-11-07 01:20:43,140 INFO L226 Difference]: Without dead ends: 594 [2021-11-07 01:20:43,141 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:20:43,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-11-07 01:20:43,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 408. [2021-11-07 01:20:43,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 1.488943488943489) internal successors, (606), 407 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:43,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 606 transitions. [2021-11-07 01:20:43,162 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 606 transitions. Word has length 60 [2021-11-07 01:20:43,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:43,162 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 606 transitions. [2021-11-07 01:20:43,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:43,163 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 606 transitions. [2021-11-07 01:20:43,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:20:43,164 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:43,164 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 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] [2021-11-07 01:20:43,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:43,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:43,379 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:20:43,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:43,380 INFO L85 PathProgramCache]: Analyzing trace with hash 310488699, now seen corresponding path program 1 times [2021-11-07 01:20:43,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:43,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1956277297] [2021-11-07 01:20:43,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:43,380 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:43,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:43,381 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:43,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:20:44,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:44,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:20:44,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:44,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:20:44,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:20:44,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:20:44,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:20:44,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:20:44,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:20:44,704 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 01:20:44,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-07 01:20:48,126 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 01:20:48,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-07 01:20:55,075 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 01:20:55,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-07 01:20:55,233 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:55,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:55,541 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:55,541 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:55,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1956277297] [2021-11-07 01:20:55,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1956277297] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:55,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:55,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:20:55,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115986508] [2021-11-07 01:20:55,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:20:55,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:55,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:20:55,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 01:20:55,544 INFO L87 Difference]: Start difference. First operand 408 states and 606 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:34,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:34,890 INFO L93 Difference]: Finished difference Result 999 states and 1498 transitions. [2021-11-07 01:21:34,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:21:34,891 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 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 [2021-11-07 01:21:34,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:34,895 INFO L225 Difference]: With dead ends: 999 [2021-11-07 01:21:34,895 INFO L226 Difference]: Without dead ends: 628 [2021-11-07 01:21:34,896 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 01:21:34,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-11-07 01:21:34,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 408. [2021-11-07 01:21:34,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 1.4914004914004915) internal successors, (607), 407 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:34,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 607 transitions. [2021-11-07 01:21:34,934 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 607 transitions. Word has length 60 [2021-11-07 01:21:34,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:21:34,934 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 607 transitions. [2021-11-07 01:21:34,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:34,935 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 607 transitions. [2021-11-07 01:21:34,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 01:21:34,936 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:34,936 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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] [2021-11-07 01:21:34,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:21:35,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:21:35,152 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:21:35,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:35,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1498911040, now seen corresponding path program 1 times [2021-11-07 01:21:35,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:21:35,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1275823629] [2021-11-07 01:21:35,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:35,153 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:21:35,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:21:35,154 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:21:35,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:21:36,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:36,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:21:36,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:36,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:21:36,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:21:36,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:21:36,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:21:36,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:21:36,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:21:36,445 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 01:21:36,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-07 01:21:39,561 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 01:21:39,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-07 01:21:46,422 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 01:21:46,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-07 01:21:46,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:21:46,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:46,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:21:46,845 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:21:46,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1275823629] [2021-11-07 01:21:46,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1275823629] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:21:46,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:21:46,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:21:46,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446151323] [2021-11-07 01:21:46,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:21:46,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:21:46,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:21:46,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 01:21:46,847 INFO L87 Difference]: Start difference. First operand 408 states and 607 transitions. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:26,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:26,082 INFO L93 Difference]: Finished difference Result 1012 states and 1514 transitions. [2021-11-07 01:22:26,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:22:26,083 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-07 01:22:26,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:26,087 INFO L225 Difference]: With dead ends: 1012 [2021-11-07 01:22:26,087 INFO L226 Difference]: Without dead ends: 641 [2021-11-07 01:22:26,088 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 01:22:26,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2021-11-07 01:22:26,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 435. [2021-11-07 01:22:26,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 1.4700460829493087) internal successors, (638), 434 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:26,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 638 transitions. [2021-11-07 01:22:26,111 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 638 transitions. Word has length 61 [2021-11-07 01:22:26,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:26,111 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 638 transitions. [2021-11-07 01:22:26,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:26,111 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 638 transitions. [2021-11-07 01:22:26,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 01:22:26,113 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:26,113 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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] [2021-11-07 01:22:26,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:22:26,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:22:26,333 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:22:26,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:26,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1596742752, now seen corresponding path program 1 times [2021-11-07 01:22:26,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:22:26,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [168462252] [2021-11-07 01:22:26,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:26,334 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:22:26,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:22:26,335 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:22:26,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:22:27,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:27,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:22:27,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:22:27,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:27,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:27,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:27,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:27,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:27,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:22:27,793 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 01:22:27,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-07 01:22:31,094 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 01:22:31,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-07 01:22:38,444 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 01:22:38,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-07 01:22:38,595 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:22:38,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:22:38,892 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:22:38,892 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:22:38,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [168462252] [2021-11-07 01:22:38,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [168462252] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:38,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:22:38,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:22:38,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331330598] [2021-11-07 01:22:38,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:22:38,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:22:38,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:22:38,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 01:22:38,894 INFO L87 Difference]: Start difference. First operand 435 states and 638 transitions. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 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) [2021-11-07 01:23:35,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:23:35,258 INFO L93 Difference]: Finished difference Result 1035 states and 1544 transitions. [2021-11-07 01:23:35,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:23:35,260 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 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 62 [2021-11-07 01:23:35,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:23:35,263 INFO L225 Difference]: With dead ends: 1035 [2021-11-07 01:23:35,263 INFO L226 Difference]: Without dead ends: 637 [2021-11-07 01:23:35,264 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 01:23:35,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-11-07 01:23:35,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 435. [2021-11-07 01:23:35,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 1.456221198156682) internal successors, (632), 434 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:23:35,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 632 transitions. [2021-11-07 01:23:35,290 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 632 transitions. Word has length 62 [2021-11-07 01:23:35,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:23:35,290 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 632 transitions. [2021-11-07 01:23:35,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 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) [2021-11-07 01:23:35,291 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 632 transitions. [2021-11-07 01:23:35,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 01:23:35,292 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:23:35,292 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-07 01:23:35,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:23:35,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:23:35,504 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:23:35,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:23:35,505 INFO L85 PathProgramCache]: Analyzing trace with hash 2086351112, now seen corresponding path program 1 times [2021-11-07 01:23:35,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:23:35,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [881491474] [2021-11-07 01:23:35,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:23:35,505 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:23:35,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:23:35,507 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:23:35,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:23:36,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:23:36,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:23:36,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:23:36,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:23:36,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:23:36,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:23:36,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:23:36,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:23:36,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:23:36,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:23:36,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:23:36,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:23:36,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:23:36,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:23:36,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:23:36,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:23:36,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:23:36,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:23:36,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:23:36,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:23:36,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:23:36,987 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:23:36,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-07 01:23:38,269 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:23:38,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-07 01:23:38,358 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:23:38,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:23:38,645 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:23:38,645 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:23:38,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [881491474] [2021-11-07 01:23:38,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [881491474] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:23:38,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:23:38,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:23:38,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388388452] [2021-11-07 01:23:38,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:23:38,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:23:38,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:23:38,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:23:38,647 INFO L87 Difference]: Start difference. First operand 435 states and 632 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 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) [2021-11-07 01:23:58,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:23:58,213 INFO L93 Difference]: Finished difference Result 890 states and 1301 transitions. [2021-11-07 01:23:58,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:23:58,221 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 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 62 [2021-11-07 01:23:58,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:23:58,224 INFO L225 Difference]: With dead ends: 890 [2021-11-07 01:23:58,224 INFO L226 Difference]: Without dead ends: 492 [2021-11-07 01:23:58,225 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:23:58,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-11-07 01:23:58,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 478. [2021-11-07 01:23:58,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 1.4444444444444444) internal successors, (689), 477 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:23:58,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 689 transitions. [2021-11-07 01:23:58,253 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 689 transitions. Word has length 62 [2021-11-07 01:23:58,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:23:58,254 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 689 transitions. [2021-11-07 01:23:58,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 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) [2021-11-07 01:23:58,254 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 689 transitions. [2021-11-07 01:23:58,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:23:58,256 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:23:58,256 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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] [2021-11-07 01:23:58,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:23:58,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:23:58,478 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:23:58,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:23:58,478 INFO L85 PathProgramCache]: Analyzing trace with hash -563287765, now seen corresponding path program 1 times [2021-11-07 01:23:58,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:23:58,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [130369452] [2021-11-07 01:23:58,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:23:58,480 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:23:58,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:23:58,481 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:23:58,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:23:59,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:00,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:24:00,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:00,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:00,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:00,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:00,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:00,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:00,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:24:00,249 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-07 01:24:00,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-07 01:24:00,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:24:00,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:24:00,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:24:00,692 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-07 01:24:00,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-07 01:24:03,404 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:24:03,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-07 01:24:03,444 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:24:03,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:03,936 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:24:03,937 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:03,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [130369452] [2021-11-07 01:24:03,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [130369452] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:03,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:03,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:24:03,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382446796] [2021-11-07 01:24:03,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:24:03,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:03,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:24:03,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:24:03,940 INFO L87 Difference]: Start difference. First operand 478 states and 689 transitions. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:34,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:34,102 INFO L93 Difference]: Finished difference Result 1372 states and 2016 transitions. [2021-11-07 01:24:34,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:24:34,104 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 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 84 [2021-11-07 01:24:34,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:34,111 INFO L225 Difference]: With dead ends: 1372 [2021-11-07 01:24:34,111 INFO L226 Difference]: Without dead ends: 931 [2021-11-07 01:24:34,113 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:24:34,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2021-11-07 01:24:34,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 586. [2021-11-07 01:24:34,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 1.4683760683760683) internal successors, (859), 585 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:34,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 859 transitions. [2021-11-07 01:24:34,150 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 859 transitions. Word has length 84 [2021-11-07 01:24:34,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:34,151 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 859 transitions. [2021-11-07 01:24:34,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:34,151 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 859 transitions. [2021-11-07 01:24:34,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 01:24:34,153 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:34,154 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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] [2021-11-07 01:24:34,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:34,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:24:34,369 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:24:34,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:34,369 INFO L85 PathProgramCache]: Analyzing trace with hash 2033323436, now seen corresponding path program 1 times [2021-11-07 01:24:34,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:34,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1510770236] [2021-11-07 01:24:34,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:34,370 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:34,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:34,372 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:34,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:24:35,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:35,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:24:35,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:35,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:35,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:35,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:35,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:35,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:35,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:24:35,931 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-07 01:24:35,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-07 01:24:36,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:24:36,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:24:36,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:24:36,378 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-07 01:24:36,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-07 01:24:39,020 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:24:39,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-07 01:24:39,060 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:24:39,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:39,536 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:24:39,536 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:39,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1510770236] [2021-11-07 01:24:39,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1510770236] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:39,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:39,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:24:39,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732150070] [2021-11-07 01:24:39,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:24:39,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:39,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:24:39,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:24:39,538 INFO L87 Difference]: Start difference. First operand 586 states and 859 transitions. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:21,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:21,560 INFO L93 Difference]: Finished difference Result 1516 states and 2255 transitions. [2021-11-07 01:25:21,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:25:21,563 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-07 01:25:21,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:21,570 INFO L225 Difference]: With dead ends: 1516 [2021-11-07 01:25:21,570 INFO L226 Difference]: Without dead ends: 967 [2021-11-07 01:25:21,572 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:25:21,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2021-11-07 01:25:21,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 640. [2021-11-07 01:25:21,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 1.4976525821596245) internal successors, (957), 639 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:21,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 957 transitions. [2021-11-07 01:25:21,610 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 957 transitions. Word has length 85 [2021-11-07 01:25:21,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:21,611 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 957 transitions. [2021-11-07 01:25:21,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:21,611 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 957 transitions. [2021-11-07 01:25:21,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-07 01:25:21,614 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:21,614 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-07 01:25:21,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:21,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:25:21,829 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:25:21,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:21,829 INFO L85 PathProgramCache]: Analyzing trace with hash -544062846, now seen corresponding path program 1 times [2021-11-07 01:25:21,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:21,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1990824539] [2021-11-07 01:25:21,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:21,831 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:21,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:21,833 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:21,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:25:23,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:23,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:25:23,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:23,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:25:23,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:25:23,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:25:23,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:25:23,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:25:23,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:25:23,694 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-07 01:25:23,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-07 01:25:23,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:25:23,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:25:23,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:25:24,124 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-07 01:25:24,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-07 01:25:26,064 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:25:26,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-07 01:25:26,211 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:25:26,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:26,763 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:25:26,763 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:26,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1990824539] [2021-11-07 01:25:26,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1990824539] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:26,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:26,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:25:26,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639390108] [2021-11-07 01:25:26,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:25:26,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:26,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:25:26,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:25:26,766 INFO L87 Difference]: Start difference. First operand 640 states and 957 transitions. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:09,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:09,194 INFO L93 Difference]: Finished difference Result 1693 states and 2564 transitions. [2021-11-07 01:26:09,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:26:09,195 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-11-07 01:26:09,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:09,201 INFO L225 Difference]: With dead ends: 1693 [2021-11-07 01:26:09,201 INFO L226 Difference]: Without dead ends: 1090 [2021-11-07 01:26:09,202 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 214 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:26:09,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2021-11-07 01:26:09,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 723. [2021-11-07 01:26:09,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 722 states have (on average 1.5096952908587258) internal successors, (1090), 722 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:09,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 1090 transitions. [2021-11-07 01:26:09,239 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 1090 transitions. Word has length 111 [2021-11-07 01:26:09,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:09,240 INFO L470 AbstractCegarLoop]: Abstraction has 723 states and 1090 transitions. [2021-11-07 01:26:09,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:09,240 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 1090 transitions. [2021-11-07 01:26:09,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-07 01:26:09,243 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:09,243 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-07 01:26:09,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:26:09,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:26:09,482 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:26:09,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:09,482 INFO L85 PathProgramCache]: Analyzing trace with hash -652317732, now seen corresponding path program 1 times [2021-11-07 01:26:09,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:26:09,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [473681410] [2021-11-07 01:26:09,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:09,483 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:26:09,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:26:09,484 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:26:09,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:26:10,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:11,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:26:11,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:11,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:26:11,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:26:11,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:26:11,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:26:11,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:26:11,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:26:11,186 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-07 01:26:11,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-07 01:26:11,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:26:11,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:26:11,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:26:11,564 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-07 01:26:11,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-07 01:26:13,397 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:26:13,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-07 01:26:13,558 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:26:13,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:14,026 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:26:14,026 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:26:14,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [473681410] [2021-11-07 01:26:14,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [473681410] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:14,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:26:14,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:26:14,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480940258] [2021-11-07 01:26:14,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:26:14,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:26:14,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:26:14,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:26:14,028 INFO L87 Difference]: Start difference. First operand 723 states and 1090 transitions. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:46,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:46,990 INFO L93 Difference]: Finished difference Result 1752 states and 2649 transitions. [2021-11-07 01:26:46,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:26:46,992 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-07 01:26:46,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:46,997 INFO L225 Difference]: With dead ends: 1752 [2021-11-07 01:26:46,997 INFO L226 Difference]: Without dead ends: 1066 [2021-11-07 01:26:46,998 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 216 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:26:46,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2021-11-07 01:26:47,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 725. [2021-11-07 01:26:47,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 724 states have (on average 1.5027624309392265) internal successors, (1088), 724 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:47,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 1088 transitions. [2021-11-07 01:26:47,033 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 1088 transitions. Word has length 112 [2021-11-07 01:26:47,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:47,034 INFO L470 AbstractCegarLoop]: Abstraction has 725 states and 1088 transitions. [2021-11-07 01:26:47,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:47,034 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 1088 transitions. [2021-11-07 01:26:47,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-07 01:26:47,037 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:47,037 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-07 01:26:47,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:26:47,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:26:47,253 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:26:47,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:47,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1821991616, now seen corresponding path program 1 times [2021-11-07 01:26:47,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:26:47,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1969974631] [2021-11-07 01:26:47,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:47,255 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:26:47,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:26:47,255 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:26:47,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:26:48,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:48,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:26:48,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:48,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:26:48,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:26:48,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:26:48,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:26:48,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:26:48,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:26:49,048 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-07 01:26:49,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-07 01:26:49,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:26:49,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:26:49,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:26:49,532 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-07 01:26:49,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-07 01:26:51,574 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:26:51,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-07 01:26:51,741 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:26:51,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:52,250 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:26:52,250 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:26:52,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1969974631] [2021-11-07 01:26:52,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1969974631] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:52,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:26:52,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:26:52,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182815152] [2021-11-07 01:26:52,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:26:52,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:26:52,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:26:52,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:26:52,253 INFO L87 Difference]: Start difference. First operand 725 states and 1088 transitions. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:15,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:15,338 INFO L93 Difference]: Finished difference Result 1809 states and 2735 transitions. [2021-11-07 01:27:15,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:27:15,339 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 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 113 [2021-11-07 01:27:15,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:15,344 INFO L225 Difference]: With dead ends: 1809 [2021-11-07 01:27:15,344 INFO L226 Difference]: Without dead ends: 1121 [2021-11-07 01:27:15,345 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 218 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:27:15,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2021-11-07 01:27:15,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 824. [2021-11-07 01:27:15,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 823 states have (on average 1.50546780072904) internal successors, (1239), 823 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:15,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 1239 transitions. [2021-11-07 01:27:15,406 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 1239 transitions. Word has length 113 [2021-11-07 01:27:15,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:15,407 INFO L470 AbstractCegarLoop]: Abstraction has 824 states and 1239 transitions. [2021-11-07 01:27:15,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:15,407 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 1239 transitions. [2021-11-07 01:27:15,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-07 01:27:15,410 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:15,410 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-07 01:27:15,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:15,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:15,631 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:27:15,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:15,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1964206957, now seen corresponding path program 1 times [2021-11-07 01:27:15,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:15,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [358156123] [2021-11-07 01:27:15,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:15,633 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:15,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:15,634 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:15,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5434577-7863-45ee-b1c5-edfcde0d513b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:27:17,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:17,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:27:17,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:17,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:17,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:17,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:17,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:17,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:17,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:27:17,482 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-07 01:27:17,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-07 01:27:17,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:27:17,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:27:17,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:27:17,987 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-07 01:27:17,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-07 01:27:20,392 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:27:20,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-07 01:27:20,605 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:27:20,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:21,166 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:27:21,167 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:21,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [358156123] [2021-11-07 01:27:21,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [358156123] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:21,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:21,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:27:21,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885830601] [2021-11-07 01:27:21,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:27:21,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:21,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:27:21,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:27:21,169 INFO L87 Difference]: Start difference. First operand 824 states and 1239 transitions. Second operand has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)