./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH --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 f0dfbb8857f62702e453e52a8d4dce71a2bbeaa268873f608805c08e77bb3dfc --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:33:15,799 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:33:15,800 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:33:15,849 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:33:15,850 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:33:15,851 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:33:15,853 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:33:15,856 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:33:15,864 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:33:15,872 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:33:15,873 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:33:15,876 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:33:15,876 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:33:15,879 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:33:15,883 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:33:15,888 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:33:15,889 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:33:15,890 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:33:15,892 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:33:15,894 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:33:15,896 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:33:15,900 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:33:15,904 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:33:15,905 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:33:15,916 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:33:15,916 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:33:15,917 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:33:15,919 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:33:15,919 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:33:15,921 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:33:15,922 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:33:15,926 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:33:15,928 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:33:15,929 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:33:15,930 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:33:15,930 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:33:15,931 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:33:15,931 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:33:15,931 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:33:15,932 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:33:15,933 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:33:15,934 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 04:33:15,980 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:33:15,980 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:33:15,981 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:33:15,981 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:33:15,982 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:33:15,982 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:33:15,982 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:33:15,982 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:33:15,988 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:33:15,989 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:33:15,989 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:33:15,990 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:33:15,990 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:33:15,990 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:33:15,990 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:33:15,991 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:33:15,991 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:33:15,991 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:33:15,992 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:33:15,992 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:33:15,992 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:33:15,992 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:33:15,992 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:33:15,993 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:33:15,993 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:33:15,993 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:33:15,993 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:33:15,993 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:33:15,994 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:33:15,994 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:33:15,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:33:15,994 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:33:15,995 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:33:15,995 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:33:15,995 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:33:15,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:33:15,995 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:33:15,995 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:33:15,996 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:33:15,996 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_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f0dfbb8857f62702e453e52a8d4dce71a2bbeaa268873f608805c08e77bb3dfc [2021-11-03 04:33:16,280 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:33:16,303 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:33:16,305 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:33:16,306 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:33:16,307 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:33:16,308 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c [2021-11-03 04:33:16,378 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/data/4cd240ca8/795cb3e967d542adb446d72a01f6dfe6/FLAGd168f4289 [2021-11-03 04:33:16,958 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:33:16,958 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c [2021-11-03 04:33:16,990 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/data/4cd240ca8/795cb3e967d542adb446d72a01f6dfe6/FLAGd168f4289 [2021-11-03 04:33:17,190 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/data/4cd240ca8/795cb3e967d542adb446d72a01f6dfe6 [2021-11-03 04:33:17,192 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:33:17,194 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:33:17,195 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:33:17,195 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:33:17,198 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:33:17,199 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:33:17" (1/1) ... [2021-11-03 04:33:17,200 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e4a5cc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:33:17, skipping insertion in model container [2021-11-03 04:33:17,200 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:33:17" (1/1) ... [2021-11-03 04:33:17,207 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:33:17,304 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:33:17,789 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_fcf2ca4e-149c-4c67-a658-b12756f4260f/sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c[74369,74382] [2021-11-03 04:33:17,797 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:33:17,822 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-03 04:33:17,823 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@76bc2c96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:33:17, skipping insertion in model container [2021-11-03 04:33:17,823 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:33:17,823 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 04:33:17,827 INFO L168 Benchmark]: Toolchain (without parser) took 630.60 ms. Allocated memory is still 111.1 MB. Free memory was 72.3 MB in the beginning and 75.4 MB in the end (delta: -3.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-03 04:33:17,828 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 111.1 MB. Free memory was 84.1 MB in the beginning and 84.1 MB in the end (delta: 26.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:33:17,829 INFO L168 Benchmark]: CACSL2BoogieTranslator took 628.16 ms. Allocated memory is still 111.1 MB. Free memory was 72.1 MB in the beginning and 75.4 MB in the end (delta: -3.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-03 04:33:17,831 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 111.1 MB. Free memory was 84.1 MB in the beginning and 84.1 MB in the end (delta: 26.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 628.16 ms. Allocated memory is still 111.1 MB. Free memory was 72.1 MB in the beginning and 75.4 MB in the end (delta: -3.3 MB). Peak memory consumption was 12.6 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_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH --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 f0dfbb8857f62702e453e52a8d4dce71a2bbeaa268873f608805c08e77bb3dfc --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:33:19,983 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:33:19,985 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:33:20,016 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:33:20,017 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:33:20,018 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:33:20,020 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:33:20,023 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:33:20,025 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:33:20,026 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:33:20,028 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:33:20,029 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:33:20,030 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:33:20,031 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:33:20,033 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:33:20,034 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:33:20,035 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:33:20,036 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:33:20,039 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:33:20,041 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:33:20,043 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:33:20,044 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:33:20,046 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:33:20,047 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:33:20,050 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:33:20,051 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:33:20,051 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:33:20,052 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:33:20,053 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:33:20,054 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:33:20,055 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:33:20,056 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:33:20,057 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:33:20,058 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:33:20,059 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:33:20,059 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:33:20,060 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:33:20,061 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:33:20,067 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:33:20,068 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:33:20,069 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:33:20,070 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-03 04:33:20,100 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:33:20,101 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:33:20,102 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:33:20,102 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:33:20,102 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:33:20,102 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:33:20,103 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:33:20,103 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:33:20,103 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:33:20,104 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:33:20,104 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:33:20,105 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:33:20,105 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:33:20,105 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:33:20,105 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:33:20,106 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:33:20,106 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:33:20,106 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 04:33:20,106 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 04:33:20,107 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:33:20,107 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:33:20,107 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:33:20,107 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:33:20,108 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:33:20,108 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 04:33:20,108 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:33:20,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:33:20,109 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:33:20,109 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:33:20,109 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:33:20,110 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 04:33:20,110 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 04:33:20,110 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:33:20,110 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:33:20,111 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:33:20,111 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_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f0dfbb8857f62702e453e52a8d4dce71a2bbeaa268873f608805c08e77bb3dfc [2021-11-03 04:33:20,463 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:33:20,483 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:33:20,485 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:33:20,486 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:33:20,487 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:33:20,488 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c [2021-11-03 04:33:20,560 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/data/9988b6eaa/f84b71beb61044bba82abd1e55ba4741/FLAGeaf8aa4f8 [2021-11-03 04:33:21,238 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:33:21,239 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c [2021-11-03 04:33:21,265 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/data/9988b6eaa/f84b71beb61044bba82abd1e55ba4741/FLAGeaf8aa4f8 [2021-11-03 04:33:21,450 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/data/9988b6eaa/f84b71beb61044bba82abd1e55ba4741 [2021-11-03 04:33:21,454 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:33:21,457 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:33:21,460 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:33:21,460 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:33:21,464 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:33:21,468 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:33:21" (1/1) ... [2021-11-03 04:33:21,470 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@303b7b35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:33:21, skipping insertion in model container [2021-11-03 04:33:21,470 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:33:21" (1/1) ... [2021-11-03 04:33:21,478 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:33:21,564 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:33:22,122 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_fcf2ca4e-149c-4c67-a658-b12756f4260f/sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c[74369,74382] [2021-11-03 04:33:22,130 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:33:22,155 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 04:33:22,193 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:33:22,352 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_fcf2ca4e-149c-4c67-a658-b12756f4260f/sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c[74369,74382] [2021-11-03 04:33:22,355 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:33:22,362 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:33:22,444 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_fcf2ca4e-149c-4c67-a658-b12756f4260f/sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c[74369,74382] [2021-11-03 04:33:22,447 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:33:22,464 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:33:22,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:33:22 WrapperNode [2021-11-03 04:33:22,465 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:33:22,466 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:33:22,466 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:33:22,466 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:33:22,486 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:33:22" (1/1) ... [2021-11-03 04:33:22,514 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:33:22" (1/1) ... [2021-11-03 04:33:22,566 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:33:22,567 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:33:22,567 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:33:22,568 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:33:22,576 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:33:22" (1/1) ... [2021-11-03 04:33:22,576 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:33:22" (1/1) ... [2021-11-03 04:33:22,588 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:33:22" (1/1) ... [2021-11-03 04:33:22,588 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:33:22" (1/1) ... [2021-11-03 04:33:22,629 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:33:22" (1/1) ... [2021-11-03 04:33:22,638 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:33:22" (1/1) ... [2021-11-03 04:33:22,641 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:33:22" (1/1) ... [2021-11-03 04:33:22,647 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:33:22,648 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:33:22,648 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:33:22,649 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:33:22,649 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:33:22" (1/1) ... [2021-11-03 04:33:22,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:33:22,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:33:22,694 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:33:22,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:33:22,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 04:33:22,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 04:33:22,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:33:22,746 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 04:33:22,746 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 04:33:22,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 04:33:22,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:33:22,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:33:22,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 04:33:22,997 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-03 04:33:31,007 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-03 04:33:31,007 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-03 04:33:31,014 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:33:31,015 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-03 04:33:31,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:33:31 BoogieIcfgContainer [2021-11-03 04:33:31,017 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:33:31,019 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:33:31,019 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:33:31,022 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:33:31,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:33:21" (1/3) ... [2021-11-03 04:33:31,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@629bc22b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:33:31, skipping insertion in model container [2021-11-03 04:33:31,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:33:22" (2/3) ... [2021-11-03 04:33:31,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@629bc22b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:33:31, skipping insertion in model container [2021-11-03 04:33:31,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:33:31" (3/3) ... [2021-11-03 04:33:31,025 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.07.i.cil-1.c [2021-11-03 04:33:31,029 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:33:31,030 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 04:33:31,074 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:33:31,080 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 [2021-11-03 04:33:31,080 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 04:33:31,097 INFO L276 IsEmpty]: Start isEmpty. Operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:31,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-03 04:33:31,105 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:33:31,106 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] [2021-11-03 04:33:31,106 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:33:31,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:33:31,111 INFO L85 PathProgramCache]: Analyzing trace with hash -442385418, now seen corresponding path program 1 times [2021-11-03 04:33:31,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:33:31,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [480216154] [2021-11-03 04:33:31,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:33:31,127 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:33:31,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:33:31,132 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:33:31,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 04:33:31,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:33:31,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:33:31,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:33:31,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:33:31,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:33:31,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:33:31,845 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:33:31,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [480216154] [2021-11-03 04:33:31,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [480216154] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:33:31,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:33:31,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:33:31,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35047106] [2021-11-03 04:33:31,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:33:31,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:33:31,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:33:31,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:33:31,868 INFO L87 Difference]: Start difference. First operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:32,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:33:32,044 INFO L93 Difference]: Finished difference Result 566 states and 965 transitions. [2021-11-03 04:33:32,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:33:32,046 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 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 37 [2021-11-03 04:33:32,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:33:32,060 INFO L225 Difference]: With dead ends: 566 [2021-11-03 04:33:32,060 INFO L226 Difference]: Without dead ends: 387 [2021-11-03 04:33:32,063 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:33:32,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-11-03 04:33:32,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 385. [2021-11-03 04:33:32,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 1.5286458333333333) internal successors, (587), 384 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:32,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 587 transitions. [2021-11-03 04:33:32,124 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 587 transitions. Word has length 37 [2021-11-03 04:33:32,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:33:32,124 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 587 transitions. [2021-11-03 04:33:32,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:32,125 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 587 transitions. [2021-11-03 04:33:32,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 04:33:32,129 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:33:32,129 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] [2021-11-03 04:33:32,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 04:33:32,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:33:32,348 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:33:32,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:33:32,349 INFO L85 PathProgramCache]: Analyzing trace with hash 746604405, now seen corresponding path program 1 times [2021-11-03 04:33:32,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:33:32,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1630054405] [2021-11-03 04:33:32,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:33:32,350 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:33:32,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:33:32,352 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:33:32,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 04:33:32,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:33:32,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:33:32,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:33:32,893 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:33:32,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:33:33,146 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:33:33,146 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:33:33,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1630054405] [2021-11-03 04:33:33,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1630054405] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:33:33,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:33:33,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:33:33,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972653446] [2021-11-03 04:33:33,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:33:33,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:33:33,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:33:33,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:33:33,150 INFO L87 Difference]: Start difference. First operand 385 states and 587 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:33,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:33:33,669 INFO L93 Difference]: Finished difference Result 882 states and 1357 transitions. [2021-11-03 04:33:33,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:33:33,671 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-03 04:33:33,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:33:33,675 INFO L225 Difference]: With dead ends: 882 [2021-11-03 04:33:33,675 INFO L226 Difference]: Without dead ends: 631 [2021-11-03 04:33:33,677 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 [2021-11-03 04:33:33,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-11-03 04:33:33,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 629. [2021-11-03 04:33:33,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 1.5222929936305734) internal successors, (956), 628 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:33,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 956 transitions. [2021-11-03 04:33:33,745 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 956 transitions. Word has length 60 [2021-11-03 04:33:33,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:33:33,746 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 956 transitions. [2021-11-03 04:33:33,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:33,747 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 956 transitions. [2021-11-03 04:33:33,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-03 04:33:33,760 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:33:33,760 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:33:33,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 04:33:33,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:33:33,965 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:33:33,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:33:33,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1749353389, now seen corresponding path program 1 times [2021-11-03 04:33:33,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:33:33,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1518532602] [2021-11-03 04:33:33,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:33:33,969 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:33:33,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:33:33,970 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:33:33,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 04:33:34,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:33:34,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:33:34,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:33:34,753 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:33:34,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:33:35,175 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:33:35,175 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:33:35,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1518532602] [2021-11-03 04:33:35,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1518532602] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:33:35,176 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:33:35,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:33:35,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841676934] [2021-11-03 04:33:35,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:33:35,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:33:35,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:33:35,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:33:35,179 INFO L87 Difference]: Start difference. First operand 629 states and 956 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:35,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:33:35,674 INFO L93 Difference]: Finished difference Result 1244 states and 1900 transitions. [2021-11-03 04:33:35,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:33:35,675 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 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 119 [2021-11-03 04:33:35,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:33:35,681 INFO L225 Difference]: With dead ends: 1244 [2021-11-03 04:33:35,681 INFO L226 Difference]: Without dead ends: 749 [2021-11-03 04:33:35,683 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:33:35,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-11-03 04:33:35,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 749. [2021-11-03 04:33:35,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 1.518716577540107) internal successors, (1136), 748 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:35,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 1136 transitions. [2021-11-03 04:33:35,710 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 1136 transitions. Word has length 119 [2021-11-03 04:33:35,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:33:35,711 INFO L470 AbstractCegarLoop]: Abstraction has 749 states and 1136 transitions. [2021-11-03 04:33:35,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:35,711 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 1136 transitions. [2021-11-03 04:33:35,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-03 04:33:35,717 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:33:35,718 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1] [2021-11-03 04:33:35,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 04:33:35,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:33:35,939 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:33:35,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:33:35,940 INFO L85 PathProgramCache]: Analyzing trace with hash 433077792, now seen corresponding path program 1 times [2021-11-03 04:33:35,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:33:35,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1992185380] [2021-11-03 04:33:35,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:33:35,943 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:33:35,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:33:35,944 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:33:35,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 04:33:36,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:33:36,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:33:36,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:33:36,864 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-03 04:33:36,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:33:37,291 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-03 04:33:37,291 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:33:37,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1992185380] [2021-11-03 04:33:37,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1992185380] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:33:37,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:33:37,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:33:37,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340874052] [2021-11-03 04:33:37,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:33:37,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:33:37,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:33:37,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:33:37,294 INFO L87 Difference]: Start difference. First operand 749 states and 1136 transitions. Second operand has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:37,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:33:37,752 INFO L93 Difference]: Finished difference Result 1611 states and 2457 transitions. [2021-11-03 04:33:37,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:33:37,753 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 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 143 [2021-11-03 04:33:37,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:33:37,759 INFO L225 Difference]: With dead ends: 1611 [2021-11-03 04:33:37,759 INFO L226 Difference]: Without dead ends: 996 [2021-11-03 04:33:37,760 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:33:37,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2021-11-03 04:33:37,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 996. [2021-11-03 04:33:37,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 1.5155778894472363) internal successors, (1508), 995 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:37,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 1508 transitions. [2021-11-03 04:33:37,798 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 1508 transitions. Word has length 143 [2021-11-03 04:33:37,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:33:37,798 INFO L470 AbstractCegarLoop]: Abstraction has 996 states and 1508 transitions. [2021-11-03 04:33:37,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:37,799 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 1508 transitions. [2021-11-03 04:33:37,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-03 04:33:37,802 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:33:37,803 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-03 04:33:37,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 04:33:38,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:33:38,019 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:33:38,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:33:38,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1349783187, now seen corresponding path program 1 times [2021-11-03 04:33:38,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:33:38,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1544307154] [2021-11-03 04:33:38,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:33:38,021 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:33:38,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:33:38,021 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:33:38,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 04:33:38,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:33:38,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:33:38,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:33:39,029 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 165 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-03 04:33:39,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:33:39,470 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 165 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-03 04:33:39,470 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:33:39,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1544307154] [2021-11-03 04:33:39,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1544307154] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:33:39,471 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:33:39,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:33:39,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724596624] [2021-11-03 04:33:39,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:33:39,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:33:39,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:33:39,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:33:39,473 INFO L87 Difference]: Start difference. First operand 996 states and 1508 transitions. Second operand has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:40,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:33:40,111 INFO L93 Difference]: Finished difference Result 2102 states and 3195 transitions. [2021-11-03 04:33:40,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:33:40,112 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 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 165 [2021-11-03 04:33:40,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:33:40,121 INFO L225 Difference]: With dead ends: 2102 [2021-11-03 04:33:40,121 INFO L226 Difference]: Without dead ends: 1240 [2021-11-03 04:33:40,125 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:33:40,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-11-03 04:33:40,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1240. [2021-11-03 04:33:40,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 1239 states have (on average 1.5125100887812752) internal successors, (1874), 1239 states have internal predecessors, (1874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:40,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 1874 transitions. [2021-11-03 04:33:40,174 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 1874 transitions. Word has length 165 [2021-11-03 04:33:40,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:33:40,175 INFO L470 AbstractCegarLoop]: Abstraction has 1240 states and 1874 transitions. [2021-11-03 04:33:40,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:40,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 1874 transitions. [2021-11-03 04:33:40,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-03 04:33:40,179 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:33:40,179 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:33:40,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 04:33:40,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:33:40,396 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:33:40,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:33:40,397 INFO L85 PathProgramCache]: Analyzing trace with hash -381805375, now seen corresponding path program 1 times [2021-11-03 04:33:40,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:33:40,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [281048596] [2021-11-03 04:33:40,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:33:40,402 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:33:40,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:33:40,403 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:33:40,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 04:33:41,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:33:41,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 04:33:41,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:33:41,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-03 04:33:41,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-03 04:33:41,674 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:33:41,677 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-03 04:33:41,684 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:33:41,687 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-11-03 04:33:41,705 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 [2021-11-03 04:33:42,164 INFO L354 Elim1Store]: treesize reduction 1607, result has 2.8 percent of original size [2021-11-03 04:33:42,165 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 [2021-11-03 04:33:42,255 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:33:42,258 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-03 04:33:42,266 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:33:42,273 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-11-03 04:33:42,290 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 [2021-11-03 04:33:42,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,430 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 97 treesize of output 49 [2021-11-03 04:33:42,537 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-03 04:33:42,537 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 4 case distinctions, treesize of input 62 treesize of output 13 [2021-11-03 04:33:42,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:42,572 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 [2021-11-03 04:33:42,607 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 [2021-11-03 04:33:42,611 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 [2021-11-03 04:33:43,073 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-03 04:33:43,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:33:43,657 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:33:43,658 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-11-03 04:33:43,664 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:33:43,666 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-03 04:33:43,804 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:33:43,806 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 393 [2021-11-03 04:33:43,814 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:33:43,817 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 510 [2021-11-03 04:33:43,828 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:33:43,832 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 687 [2021-11-03 04:33:43,850 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:33:43,853 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 744 [2021-11-03 04:33:43,875 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:33:43,878 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 861 [2021-11-03 04:33:43,909 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:33:43,912 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1038 [2021-11-03 04:33:44,389 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-03 04:33:44,390 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:33:44,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [281048596] [2021-11-03 04:33:44,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [281048596] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:33:44,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:33:44,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 04:33:44,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734080994] [2021-11-03 04:33:44,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:33:44,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:33:44,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:33:44,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:33:44,395 INFO L87 Difference]: Start difference. First operand 1240 states and 1874 transitions. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:09,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:34:09,969 INFO L93 Difference]: Finished difference Result 2477 states and 3744 transitions. [2021-11-03 04:34:09,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:34:09,971 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 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 172 [2021-11-03 04:34:09,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:34:09,978 INFO L225 Difference]: With dead ends: 2477 [2021-11-03 04:34:09,978 INFO L226 Difference]: Without dead ends: 1240 [2021-11-03 04:34:09,980 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 335 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:34:09,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-11-03 04:34:10,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1240. [2021-11-03 04:34:10,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 1239 states have (on average 1.5117029862792575) internal successors, (1873), 1239 states have internal predecessors, (1873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:10,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 1873 transitions. [2021-11-03 04:34:10,037 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 1873 transitions. Word has length 172 [2021-11-03 04:34:10,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:10,037 INFO L470 AbstractCegarLoop]: Abstraction has 1240 states and 1873 transitions. [2021-11-03 04:34:10,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:10,038 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 1873 transitions. [2021-11-03 04:34:10,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-03 04:34:10,042 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:10,042 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:34:10,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 04:34:10,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:34:10,268 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:34:10,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:10,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1884903681, now seen corresponding path program 1 times [2021-11-03 04:34:10,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:34:10,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1766728278] [2021-11-03 04:34:10,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:10,269 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:34:10,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:34:10,270 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:34:10,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 04:34:11,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:11,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:34:11,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:34:11,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:34:11,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:34:11,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:34:11,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:34:11,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:34:11,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:34:11,629 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-03 04:34:11,629 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 [2021-11-03 04:34:11,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:34:11,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:34:11,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:34:11,998 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 04:34:11,999 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 [2021-11-03 04:34:13,350 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:34:13,351 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 [2021-11-03 04:34:13,661 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-03 04:34:13,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:34:14,217 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-03 04:34:14,218 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:34:14,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1766728278] [2021-11-03 04:34:14,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1766728278] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:34:14,218 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:34:14,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:34:14,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816489423] [2021-11-03 04:34:14,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:34:14,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:34:14,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:34:14,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:34:14,221 INFO L87 Difference]: Start difference. First operand 1240 states and 1873 transitions. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:03,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:35:03,553 INFO L93 Difference]: Finished difference Result 4654 states and 7069 transitions. [2021-11-03 04:35:03,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:35:03,555 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 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 172 [2021-11-03 04:35:03,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:35:03,574 INFO L225 Difference]: With dead ends: 4654 [2021-11-03 04:35:03,575 INFO L226 Difference]: Without dead ends: 3424 [2021-11-03 04:35:03,577 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 336 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:35:03,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3424 states. [2021-11-03 04:35:03,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3424 to 1489. [2021-11-03 04:35:03,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1489 states, 1488 states have (on average 1.5470430107526882) internal successors, (2302), 1488 states have internal predecessors, (2302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:03,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1489 states to 1489 states and 2302 transitions. [2021-11-03 04:35:03,689 INFO L78 Accepts]: Start accepts. Automaton has 1489 states and 2302 transitions. Word has length 172 [2021-11-03 04:35:03,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:35:03,689 INFO L470 AbstractCegarLoop]: Abstraction has 1489 states and 2302 transitions. [2021-11-03 04:35:03,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:03,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1489 states and 2302 transitions. [2021-11-03 04:35:03,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-03 04:35:03,694 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:35:03,694 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:35:03,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 04:35:03,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:35:03,915 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:35:03,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:35:03,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1462011649, now seen corresponding path program 1 times [2021-11-03 04:35:03,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:35:03,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [819621728] [2021-11-03 04:35:03,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:35:03,917 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:35:03,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:35:03,917 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:35:03,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 04:35:04,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:35:05,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:35:05,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:35:05,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:35:05,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:35:05,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:35:05,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:35:05,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:35:05,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:35:05,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:35:05,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:35:05,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:35:05,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:35:05,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:35:05,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:35:05,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:35:05,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:35:05,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:35:05,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:35:05,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:35:05,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:35:05,602 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 04:35:05,602 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 [2021-11-03 04:35:07,319 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:35:07,320 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 [2021-11-03 04:35:07,487 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-03 04:35:07,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:35:08,027 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-03 04:35:08,027 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:35:08,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [819621728] [2021-11-03 04:35:08,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [819621728] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:35:08,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:35:08,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 04:35:08,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438031718] [2021-11-03 04:35:08,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:35:08,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:35:08,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:35:08,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:35:08,030 INFO L87 Difference]: Start difference. First operand 1489 states and 2302 transitions. Second operand has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:27,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:35:27,366 INFO L93 Difference]: Finished difference Result 3604 states and 5571 transitions. [2021-11-03 04:35:27,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:35:27,373 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 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 172 [2021-11-03 04:35:27,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:35:27,387 INFO L225 Difference]: With dead ends: 3604 [2021-11-03 04:35:27,388 INFO L226 Difference]: Without dead ends: 2125 [2021-11-03 04:35:27,390 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 338 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:35:27,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2125 states. [2021-11-03 04:35:27,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2125 to 1769. [2021-11-03 04:35:27,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1769 states, 1768 states have (on average 1.579185520361991) internal successors, (2792), 1768 states have internal predecessors, (2792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:27,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1769 states to 1769 states and 2792 transitions. [2021-11-03 04:35:27,504 INFO L78 Accepts]: Start accepts. Automaton has 1769 states and 2792 transitions. Word has length 172 [2021-11-03 04:35:27,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:35:27,505 INFO L470 AbstractCegarLoop]: Abstraction has 1769 states and 2792 transitions. [2021-11-03 04:35:27,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:27,506 INFO L276 IsEmpty]: Start isEmpty. Operand 1769 states and 2792 transitions. [2021-11-03 04:35:27,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-03 04:35:27,512 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:35:27,512 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:35:27,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-03 04:35:27,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:35:27,737 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:35:27,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:35:27,737 INFO L85 PathProgramCache]: Analyzing trace with hash 991422329, now seen corresponding path program 1 times [2021-11-03 04:35:27,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:35:27,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1815272888] [2021-11-03 04:35:27,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:35:27,739 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:35:27,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:35:27,748 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:35:27,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 04:35:29,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:35:29,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:35:29,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:35:29,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:35:29,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:35:29,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:35:29,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:35:29,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:35:29,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:35:29,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:35:29,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:35:29,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:35:29,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:35:29,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:35:29,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:35:29,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:35:29,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:35:29,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:35:29,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:35:29,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:35:29,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:35:30,186 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 04:35:30,186 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 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-03 04:35:30,948 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:35:30,948 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 [2021-11-03 04:35:31,243 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 199 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 04:35:31,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:35:31,725 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 199 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 04:35:31,726 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:35:31,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1815272888] [2021-11-03 04:35:31,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1815272888] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:35:31,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:35:31,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:35:31,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017632105] [2021-11-03 04:35:31,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:35:31,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:35:31,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:35:31,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:35:31,728 INFO L87 Difference]: Start difference. First operand 1769 states and 2792 transitions. Second operand has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:10,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:36:10,385 INFO L93 Difference]: Finished difference Result 5243 states and 8185 transitions. [2021-11-03 04:36:10,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:36:10,393 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 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 185 [2021-11-03 04:36:10,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:36:10,415 INFO L225 Difference]: With dead ends: 5243 [2021-11-03 04:36:10,416 INFO L226 Difference]: Without dead ends: 3484 [2021-11-03 04:36:10,419 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:36:10,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3484 states. [2021-11-03 04:36:10,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3484 to 2073. [2021-11-03 04:36:10,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2073 states, 2072 states have (on average 1.5810810810810811) internal successors, (3276), 2072 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:10,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2073 states to 2073 states and 3276 transitions. [2021-11-03 04:36:10,570 INFO L78 Accepts]: Start accepts. Automaton has 2073 states and 3276 transitions. Word has length 185 [2021-11-03 04:36:10,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:36:10,570 INFO L470 AbstractCegarLoop]: Abstraction has 2073 states and 3276 transitions. [2021-11-03 04:36:10,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:10,571 INFO L276 IsEmpty]: Start isEmpty. Operand 2073 states and 3276 transitions. [2021-11-03 04:36:10,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-03 04:36:10,578 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:36:10,578 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:36:10,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 04:36:10,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:36:10,804 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:36:10,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:36:10,804 INFO L85 PathProgramCache]: Analyzing trace with hash -503738714, now seen corresponding path program 1 times [2021-11-03 04:36:10,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:36:10,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1029541488] [2021-11-03 04:36:10,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:36:10,807 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:36:10,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:36:10,808 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:36:10,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 04:36:13,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:36:13,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:36:13,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:36:13,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:36:13,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:36:13,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:36:13,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:36:13,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:36:13,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:36:13,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:36:13,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:36:13,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:36:13,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:36:13,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:36:13,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:36:13,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:36:13,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:36:13,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:36:13,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:36:13,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:36:13,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:36:13,764 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 04:36:13,764 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 [2021-11-03 04:36:14,186 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:36:14,187 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 [2021-11-03 04:36:14,457 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 04:36:14,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:36:14,975 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 04:36:14,975 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:36:14,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1029541488] [2021-11-03 04:36:14,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1029541488] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:36:14,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:36:14,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:36:14,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174823915] [2021-11-03 04:36:14,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:36:14,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:36:14,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:36:14,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:36:14,978 INFO L87 Difference]: Start difference. First operand 2073 states and 3276 transitions. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:59,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:36:59,130 INFO L93 Difference]: Finished difference Result 5447 states and 8470 transitions. [2021-11-03 04:36:59,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:36:59,132 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 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 186 [2021-11-03 04:36:59,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:36:59,148 INFO L225 Difference]: With dead ends: 5447 [2021-11-03 04:36:59,148 INFO L226 Difference]: Without dead ends: 3384 [2021-11-03 04:36:59,151 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:36:59,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3384 states. [2021-11-03 04:36:59,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3384 to 2073. [2021-11-03 04:36:59,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2073 states, 2072 states have (on average 1.5622586872586872) internal successors, (3237), 2072 states have internal predecessors, (3237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:59,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2073 states to 2073 states and 3237 transitions. [2021-11-03 04:36:59,285 INFO L78 Accepts]: Start accepts. Automaton has 2073 states and 3237 transitions. Word has length 186 [2021-11-03 04:36:59,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:36:59,286 INFO L470 AbstractCegarLoop]: Abstraction has 2073 states and 3237 transitions. [2021-11-03 04:36:59,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:59,286 INFO L276 IsEmpty]: Start isEmpty. Operand 2073 states and 3237 transitions. [2021-11-03 04:36:59,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-03 04:36:59,292 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:36:59,292 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:36:59,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 04:36:59,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:36:59,518 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:36:59,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:36:59,519 INFO L85 PathProgramCache]: Analyzing trace with hash 790677906, now seen corresponding path program 1 times [2021-11-03 04:36:59,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:36:59,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1334380709] [2021-11-03 04:36:59,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:36:59,521 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:36:59,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:36:59,522 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:36:59,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 04:37:01,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:37:01,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:37:01,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:37:01,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:37:01,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:37:01,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:37:01,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:37:01,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:37:01,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:37:01,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:37:01,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:37:01,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:37:01,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:37:01,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:37:01,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:37:01,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:37:01,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:37:01,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:37:01,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:37:01,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:37:01,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:37:01,645 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 04:37:01,646 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 [2021-11-03 04:37:02,091 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:37:02,092 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 [2021-11-03 04:37:02,302 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 04:37:02,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:37:02,759 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 04:37:02,759 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:37:02,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1334380709] [2021-11-03 04:37:02,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1334380709] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:37:02,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:37:02,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:37:02,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201430062] [2021-11-03 04:37:02,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:37:02,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:37:02,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:37:02,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:37:02,762 INFO L87 Difference]: Start difference. First operand 2073 states and 3237 transitions. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 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) [2021-11-03 04:37:41,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:37:41,077 INFO L93 Difference]: Finished difference Result 5663 states and 8752 transitions. [2021-11-03 04:37:41,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:37:41,079 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 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 186 [2021-11-03 04:37:41,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:37:41,098 INFO L225 Difference]: With dead ends: 5663 [2021-11-03 04:37:41,098 INFO L226 Difference]: Without dead ends: 3600 [2021-11-03 04:37:41,101 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:37:41,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3600 states. [2021-11-03 04:37:41,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3600 to 2181. [2021-11-03 04:37:41,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2181 states, 2180 states have (on average 1.5412844036697249) internal successors, (3360), 2180 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:37:41,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2181 states to 2181 states and 3360 transitions. [2021-11-03 04:37:41,264 INFO L78 Accepts]: Start accepts. Automaton has 2181 states and 3360 transitions. Word has length 186 [2021-11-03 04:37:41,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:37:41,265 INFO L470 AbstractCegarLoop]: Abstraction has 2181 states and 3360 transitions. [2021-11-03 04:37:41,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 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) [2021-11-03 04:37:41,265 INFO L276 IsEmpty]: Start isEmpty. Operand 2181 states and 3360 transitions. [2021-11-03 04:37:41,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-03 04:37:41,271 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:37:41,271 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:37:41,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 04:37:41,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:37:41,484 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:37:41,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:37:41,485 INFO L85 PathProgramCache]: Analyzing trace with hash 2111383387, now seen corresponding path program 1 times [2021-11-03 04:37:41,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:37:41,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1692443466] [2021-11-03 04:37:41,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:37:41,487 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:37:41,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:37:41,487 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:37:41,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 04:37:43,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:37:43,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:37:43,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:37:43,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:37:43,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:37:43,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:37:43,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:37:43,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:37:43,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:37:43,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:37:43,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:37:43,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:37:43,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:37:43,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:37:43,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:37:43,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:37:43,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:37:43,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:37:43,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:37:43,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:37:43,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:37:43,567 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 04:37:43,568 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 [2021-11-03 04:37:44,397 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:37:44,397 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 107 treesize of output 35 [2021-11-03 04:37:44,596 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 04:37:44,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:37:45,046 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 04:37:45,046 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:37:45,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1692443466] [2021-11-03 04:37:45,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1692443466] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:37:45,050 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:37:45,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:37:45,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788652620] [2021-11-03 04:37:45,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:37:45,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:37:45,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:37:45,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:37:45,052 INFO L87 Difference]: Start difference. First operand 2181 states and 3360 transitions. Second operand has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:38:18,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:38:18,809 INFO L93 Difference]: Finished difference Result 5643 states and 8618 transitions. [2021-11-03 04:38:18,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:38:18,810 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 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 186 [2021-11-03 04:38:18,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:38:18,827 INFO L225 Difference]: With dead ends: 5643 [2021-11-03 04:38:18,827 INFO L226 Difference]: Without dead ends: 3472 [2021-11-03 04:38:18,829 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:38:18,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3472 states. [2021-11-03 04:38:18,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3472 to 2199. [2021-11-03 04:38:18,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2199 states, 2198 states have (on average 1.5318471337579618) internal successors, (3367), 2198 states have internal predecessors, (3367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:38:18,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2199 states to 2199 states and 3367 transitions. [2021-11-03 04:38:18,981 INFO L78 Accepts]: Start accepts. Automaton has 2199 states and 3367 transitions. Word has length 186 [2021-11-03 04:38:18,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:38:18,981 INFO L470 AbstractCegarLoop]: Abstraction has 2199 states and 3367 transitions. [2021-11-03 04:38:18,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:38:18,982 INFO L276 IsEmpty]: Start isEmpty. Operand 2199 states and 3367 transitions. [2021-11-03 04:38:18,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-03 04:38:18,986 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:38:18,987 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:38:19,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 04:38:19,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:38:19,200 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:38:19,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:38:19,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1645926757, now seen corresponding path program 1 times [2021-11-03 04:38:19,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:38:19,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1914452023] [2021-11-03 04:38:19,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:38:19,202 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:38:19,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:38:19,203 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:38:19,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 04:38:20,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:38:20,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:38:20,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:38:21,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:38:21,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:38:21,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:38:21,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:38:21,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:38:21,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:38:21,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:38:21,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:38:21,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:38:21,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:38:21,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:38:21,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:38:21,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:38:21,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:38:21,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:38:21,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:38:21,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:38:21,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:38:21,489 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 04:38:21,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-03 04:38:22,214 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:38:22,214 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 [2021-11-03 04:38:22,430 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 04:38:22,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:38:22,922 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 04:38:22,922 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:38:22,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1914452023] [2021-11-03 04:38:22,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1914452023] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:38:22,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:38:22,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:38:22,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740974117] [2021-11-03 04:38:22,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:38:22,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:38:22,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:38:22,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:38:22,924 INFO L87 Difference]: Start difference. First operand 2199 states and 3367 transitions. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:38:57,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:38:57,733 INFO L93 Difference]: Finished difference Result 5641 states and 8576 transitions. [2021-11-03 04:38:57,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:38:57,734 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 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 186 [2021-11-03 04:38:57,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:38:57,742 INFO L225 Difference]: With dead ends: 5641 [2021-11-03 04:38:57,742 INFO L226 Difference]: Without dead ends: 3452 [2021-11-03 04:38:57,745 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:38:57,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3452 states. [2021-11-03 04:38:57,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3452 to 2199. [2021-11-03 04:38:57,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2199 states, 2198 states have (on average 1.518653321201092) internal successors, (3338), 2198 states have internal predecessors, (3338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:38:57,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2199 states to 2199 states and 3338 transitions. [2021-11-03 04:38:57,889 INFO L78 Accepts]: Start accepts. Automaton has 2199 states and 3338 transitions. Word has length 186 [2021-11-03 04:38:57,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:38:57,890 INFO L470 AbstractCegarLoop]: Abstraction has 2199 states and 3338 transitions. [2021-11-03 04:38:57,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:38:57,890 INFO L276 IsEmpty]: Start isEmpty. Operand 2199 states and 3338 transitions. [2021-11-03 04:38:57,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-03 04:38:57,895 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:38:57,896 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:38:57,920 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-03 04:38:58,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:38:58,123 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:38:58,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:38:58,123 INFO L85 PathProgramCache]: Analyzing trace with hash -855064592, now seen corresponding path program 1 times [2021-11-03 04:38:58,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:38:58,124 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1734086265] [2021-11-03 04:38:58,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:38:58,124 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:38:58,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:38:58,126 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:38:58,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 04:39:00,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:39:00,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:39:00,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:39:00,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:00,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:00,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:00,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:00,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:00,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:00,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:00,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:00,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:00,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:00,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:00,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:00,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:00,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:39:00,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:39:00,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:39:00,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:39:00,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:39:00,806 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 04:39:00,807 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 [2021-11-03 04:39:01,376 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:39:01,376 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 [2021-11-03 04:39:01,621 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 04:39:01,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:39:02,105 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 04:39:02,106 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:39:02,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1734086265] [2021-11-03 04:39:02,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1734086265] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:39:02,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:39:02,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:39:02,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769311989] [2021-11-03 04:39:02,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:39:02,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:39:02,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:39:02,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:39:02,108 INFO L87 Difference]: Start difference. First operand 2199 states and 3338 transitions. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 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) [2021-11-03 04:39:37,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:39:37,596 INFO L93 Difference]: Finished difference Result 5749 states and 8698 transitions. [2021-11-03 04:39:37,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:39:37,597 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 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 187 [2021-11-03 04:39:37,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:39:37,605 INFO L225 Difference]: With dead ends: 5749 [2021-11-03 04:39:37,606 INFO L226 Difference]: Without dead ends: 3560 [2021-11-03 04:39:37,609 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:39:37,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3560 states. [2021-11-03 04:39:37,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3560 to 2208. [2021-11-03 04:39:37,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2208 states, 2207 states have (on average 1.5029451744449478) internal successors, (3317), 2207 states have internal predecessors, (3317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:39:37,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2208 states to 2208 states and 3317 transitions. [2021-11-03 04:39:37,807 INFO L78 Accepts]: Start accepts. Automaton has 2208 states and 3317 transitions. Word has length 187 [2021-11-03 04:39:37,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:39:37,808 INFO L470 AbstractCegarLoop]: Abstraction has 2208 states and 3317 transitions. [2021-11-03 04:39:37,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 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) [2021-11-03 04:39:37,808 INFO L276 IsEmpty]: Start isEmpty. Operand 2208 states and 3317 transitions. [2021-11-03 04:39:37,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-03 04:39:37,812 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:39:37,813 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:39:37,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-03 04:39:38,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:39:38,036 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:39:38,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:39:38,037 INFO L85 PathProgramCache]: Analyzing trace with hash -711546899, now seen corresponding path program 1 times [2021-11-03 04:39:38,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:39:38,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1666413651] [2021-11-03 04:39:38,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:39:38,038 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:39:38,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:39:38,040 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:39:38,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 04:39:40,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:39:40,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:39:40,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:39:40,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:40,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:40,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:40,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:40,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:40,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:40,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:40,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:40,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:40,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:40,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:40,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:40,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:40,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:39:40,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:39:40,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:39:40,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:39:40,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:39:40,870 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 04:39:40,870 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 [2021-11-03 04:39:41,459 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:39:41,460 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 [2021-11-03 04:39:41,757 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 04:39:41,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:39:42,266 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 04:39:42,267 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:39:42,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1666413651] [2021-11-03 04:39:42,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1666413651] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:39:42,267 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:39:42,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:39:42,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549170099] [2021-11-03 04:39:42,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:39:42,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:39:42,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:39:42,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:39:42,269 INFO L87 Difference]: Start difference. First operand 2208 states and 3317 transitions. Second operand has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 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) [2021-11-03 04:40:12,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:40:12,424 INFO L93 Difference]: Finished difference Result 5758 states and 8638 transitions. [2021-11-03 04:40:12,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:40:12,426 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 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 188 [2021-11-03 04:40:12,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:40:12,435 INFO L225 Difference]: With dead ends: 5758 [2021-11-03 04:40:12,435 INFO L226 Difference]: Without dead ends: 3560 [2021-11-03 04:40:12,439 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:40:12,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3560 states. [2021-11-03 04:40:12,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3560 to 2217. [2021-11-03 04:40:12,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2217 states, 2216 states have (on average 1.4873646209386282) internal successors, (3296), 2216 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:40:12,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2217 states to 2217 states and 3296 transitions. [2021-11-03 04:40:12,567 INFO L78 Accepts]: Start accepts. Automaton has 2217 states and 3296 transitions. Word has length 188 [2021-11-03 04:40:12,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:40:12,568 INFO L470 AbstractCegarLoop]: Abstraction has 2217 states and 3296 transitions. [2021-11-03 04:40:12,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 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) [2021-11-03 04:40:12,568 INFO L276 IsEmpty]: Start isEmpty. Operand 2217 states and 3296 transitions. [2021-11-03 04:40:12,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-03 04:40:12,572 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:40:12,572 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:40:12,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 04:40:12,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:40:12,788 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:40:12,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:40:12,789 INFO L85 PathProgramCache]: Analyzing trace with hash -935538133, now seen corresponding path program 1 times [2021-11-03 04:40:12,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:40:12,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1909986163] [2021-11-03 04:40:12,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:40:12,790 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:40:12,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:40:12,791 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:40:12,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 04:40:14,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:40:14,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:40:14,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:40:14,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:40:14,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:40:14,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:40:14,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:40:14,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:40:14,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:40:14,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:40:14,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:40:14,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:40:14,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:40:14,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:40:14,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:40:14,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:40:14,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:40:14,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:40:14,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:40:14,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:40:14,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:40:15,260 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 04:40:15,261 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 [2021-11-03 04:40:15,871 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:40:15,872 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 [2021-11-03 04:40:16,076 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 193 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 04:40:16,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:40:16,568 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 193 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 04:40:16,568 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:40:16,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1909986163] [2021-11-03 04:40:16,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1909986163] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:40:16,568 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:40:16,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:40:16,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989149053] [2021-11-03 04:40:16,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:40:16,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:40:16,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:40:16,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:40:16,570 INFO L87 Difference]: Start difference. First operand 2217 states and 3296 transitions. Second operand has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:40:46,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:40:46,117 INFO L93 Difference]: Finished difference Result 5567 states and 8291 transitions. [2021-11-03 04:40:46,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:40:46,119 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 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 189 [2021-11-03 04:40:46,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:40:46,141 INFO L225 Difference]: With dead ends: 5567 [2021-11-03 04:40:46,141 INFO L226 Difference]: Without dead ends: 3360 [2021-11-03 04:40:46,144 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:40:46,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3360 states. [2021-11-03 04:40:46,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3360 to 2217. [2021-11-03 04:40:46,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2217 states, 2216 states have (on average 1.4697653429602888) internal successors, (3257), 2216 states have internal predecessors, (3257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:40:46,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2217 states to 2217 states and 3257 transitions. [2021-11-03 04:40:46,335 INFO L78 Accepts]: Start accepts. Automaton has 2217 states and 3257 transitions. Word has length 189 [2021-11-03 04:40:46,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:40:46,335 INFO L470 AbstractCegarLoop]: Abstraction has 2217 states and 3257 transitions. [2021-11-03 04:40:46,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:40:46,336 INFO L276 IsEmpty]: Start isEmpty. Operand 2217 states and 3257 transitions. [2021-11-03 04:40:46,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-03 04:40:46,346 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:40:46,346 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:40:46,366 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-03 04:40:46,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:40:46,550 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:40:46,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:40:46,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1463772801, now seen corresponding path program 1 times [2021-11-03 04:40:46,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:40:46,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1630452611] [2021-11-03 04:40:46,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:40:46,551 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:40:46,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:40:46,552 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:40:46,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 04:40:48,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:40:48,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:40:48,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:40:48,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:40:48,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:40:48,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:40:48,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:40:48,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:40:48,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:40:48,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:40:48,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:40:48,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:40:48,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:40:48,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:40:48,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:40:48,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:40:48,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:40:48,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:40:48,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:40:48,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:40:48,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:40:49,135 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 04:40:49,135 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 [2021-11-03 04:40:49,931 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:40:49,934 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 [2021-11-03 04:40:50,125 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 220 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 04:40:50,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:40:50,659 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 220 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 04:40:50,660 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:40:50,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1630452611] [2021-11-03 04:40:50,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1630452611] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:40:50,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:40:50,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:40:50,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461720983] [2021-11-03 04:40:50,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:40:50,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:40:50,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:40:50,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:40:50,662 INFO L87 Difference]: Start difference. First operand 2217 states and 3257 transitions. Second operand has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:41:22,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:41:22,562 INFO L93 Difference]: Finished difference Result 5584 states and 8228 transitions. [2021-11-03 04:41:22,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:41:22,567 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 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 189 [2021-11-03 04:41:22,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:41:22,575 INFO L225 Difference]: With dead ends: 5584 [2021-11-03 04:41:22,575 INFO L226 Difference]: Without dead ends: 3600 [2021-11-03 04:41:22,577 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:41:22,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3600 states. [2021-11-03 04:41:22,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3600 to 2416. [2021-11-03 04:41:22,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2416 states, 2415 states have (on average 1.4476190476190476) internal successors, (3496), 2415 states have internal predecessors, (3496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:41:22,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2416 states to 2416 states and 3496 transitions. [2021-11-03 04:41:22,825 INFO L78 Accepts]: Start accepts. Automaton has 2416 states and 3496 transitions. Word has length 189 [2021-11-03 04:41:22,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:41:22,826 INFO L470 AbstractCegarLoop]: Abstraction has 2416 states and 3496 transitions. [2021-11-03 04:41:22,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:41:22,826 INFO L276 IsEmpty]: Start isEmpty. Operand 2416 states and 3496 transitions. [2021-11-03 04:41:22,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-03 04:41:22,830 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:41:22,830 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:41:22,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-03 04:41:23,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:41:23,048 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:41:23,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:41:23,048 INFO L85 PathProgramCache]: Analyzing trace with hash -70761122, now seen corresponding path program 1 times [2021-11-03 04:41:23,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:41:23,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1402499141] [2021-11-03 04:41:23,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:41:23,049 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:41:23,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:41:23,050 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:41:23,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 04:41:25,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:41:25,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:41:25,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:41:25,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:41:25,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:41:25,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:41:25,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:41:25,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:41:25,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:41:25,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:41:25,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:41:25,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:41:25,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:41:25,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:41:25,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:41:25,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:41:25,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:41:25,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:41:25,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:41:25,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:41:25,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:41:25,685 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 04:41:25,686 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 [2021-11-03 04:41:26,529 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:41:26,530 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 [2021-11-03 04:41:26,719 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 225 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 04:41:26,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:41:27,212 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 225 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 04:41:27,212 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:41:27,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1402499141] [2021-11-03 04:41:27,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1402499141] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:41:27,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:41:27,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:41:27,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861645682] [2021-11-03 04:41:27,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:41:27,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:41:27,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:41:27,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:41:27,215 INFO L87 Difference]: Start difference. First operand 2416 states and 3496 transitions. Second operand has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:41:57,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:41:57,718 INFO L93 Difference]: Finished difference Result 5774 states and 8426 transitions. [2021-11-03 04:41:57,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:41:57,720 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 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 190 [2021-11-03 04:41:57,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:41:57,727 INFO L225 Difference]: With dead ends: 5774 [2021-11-03 04:41:57,727 INFO L226 Difference]: Without dead ends: 3611 [2021-11-03 04:41:57,730 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 374 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:41:57,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3611 states. [2021-11-03 04:41:58,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3611 to 2446. [2021-11-03 04:41:58,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2446 states, 2445 states have (on average 1.4384458077709612) internal successors, (3517), 2445 states have internal predecessors, (3517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:41:58,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2446 states to 2446 states and 3517 transitions. [2021-11-03 04:41:58,063 INFO L78 Accepts]: Start accepts. Automaton has 2446 states and 3517 transitions. Word has length 190 [2021-11-03 04:41:58,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:41:58,063 INFO L470 AbstractCegarLoop]: Abstraction has 2446 states and 3517 transitions. [2021-11-03 04:41:58,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:41:58,064 INFO L276 IsEmpty]: Start isEmpty. Operand 2446 states and 3517 transitions. [2021-11-03 04:41:58,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-03 04:41:58,066 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:41:58,067 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:41:58,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-03 04:41:58,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:41:58,267 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:41:58,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:41:58,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1700911676, now seen corresponding path program 1 times [2021-11-03 04:41:58,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:41:58,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1571607053] [2021-11-03 04:41:58,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:41:58,269 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:41:58,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:41:58,270 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:41:58,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-03 04:42:00,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:42:00,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:42:00,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:42:00,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:42:00,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:42:00,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:42:00,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:42:00,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:42:00,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:42:00,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:42:00,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:42:00,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:42:00,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:42:00,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:42:00,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:42:00,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:42:00,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:42:00,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:42:00,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:42:00,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:42:00,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:42:01,168 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 04:42:01,168 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 [2021-11-03 04:42:02,125 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:42:02,125 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 [2021-11-03 04:42:02,311 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 230 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 04:42:02,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:42:02,793 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 230 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 04:42:02,794 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:42:02,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1571607053] [2021-11-03 04:42:02,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1571607053] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:42:02,794 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:42:02,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:42:02,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817964972] [2021-11-03 04:42:02,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:42:02,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:42:02,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:42:02,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:42:02,799 INFO L87 Difference]: Start difference. First operand 2446 states and 3517 transitions. Second operand has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 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) [2021-11-03 04:42:26,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:42:26,853 INFO L93 Difference]: Finished difference Result 5962 states and 8621 transitions. [2021-11-03 04:42:26,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:42:26,854 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 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) Word has length 191 [2021-11-03 04:42:26,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:42:26,859 INFO L225 Difference]: With dead ends: 5962 [2021-11-03 04:42:26,859 INFO L226 Difference]: Without dead ends: 3782 [2021-11-03 04:42:26,861 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:42:26,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3782 states. [2021-11-03 04:42:27,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3782 to 2665. [2021-11-03 04:42:27,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2665 states, 2664 states have (on average 1.4174174174174174) internal successors, (3776), 2664 states have internal predecessors, (3776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:42:27,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2665 states to 2665 states and 3776 transitions. [2021-11-03 04:42:27,092 INFO L78 Accepts]: Start accepts. Automaton has 2665 states and 3776 transitions. Word has length 191 [2021-11-03 04:42:27,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:42:27,092 INFO L470 AbstractCegarLoop]: Abstraction has 2665 states and 3776 transitions. [2021-11-03 04:42:27,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 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) [2021-11-03 04:42:27,093 INFO L276 IsEmpty]: Start isEmpty. Operand 2665 states and 3776 transitions. [2021-11-03 04:42:27,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-03 04:42:27,097 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:42:27,097 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:42:27,135 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-03 04:42:27,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:42:27,319 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:42:27,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:42:27,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1281413366, now seen corresponding path program 1 times [2021-11-03 04:42:27,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:42:27,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [480828992] [2021-11-03 04:42:27,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:42:27,321 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:42:27,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:42:27,322 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:42:27,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-03 04:42:29,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:42:29,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:42:29,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:42:29,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:42:29,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:42:29,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:42:29,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:42:29,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:42:29,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:42:29,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:42:29,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:42:29,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:42:29,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:42:29,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:42:29,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:42:29,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:42:29,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:42:29,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:42:29,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:42:29,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:42:29,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:42:30,327 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 04:42:30,327 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 [2021-11-03 04:42:31,386 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:42:31,386 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 [2021-11-03 04:42:31,593 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 237 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 04:42:31,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:42:32,107 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 237 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 04:42:32,107 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:42:32,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [480828992] [2021-11-03 04:42:32,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [480828992] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:42:32,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:42:32,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:42:32,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437855496] [2021-11-03 04:42:32,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:42:32,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:42:32,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:42:32,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:42:32,108 INFO L87 Difference]: Start difference. First operand 2665 states and 3776 transitions. Second operand has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 6 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:42:59,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:42:59,460 INFO L93 Difference]: Finished difference Result 6612 states and 9430 transitions. [2021-11-03 04:42:59,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:42:59,464 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 6 states have internal predecessors, (146), 0 states have call successors, (0), 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 194 [2021-11-03 04:42:59,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:42:59,469 INFO L225 Difference]: With dead ends: 6612 [2021-11-03 04:42:59,469 INFO L226 Difference]: Without dead ends: 3968 [2021-11-03 04:42:59,471 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:42:59,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3968 states. [2021-11-03 04:42:59,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3968 to 2872. [2021-11-03 04:42:59,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2872 states, 2871 states have (on average 1.399164054336468) internal successors, (4017), 2871 states have internal predecessors, (4017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:42:59,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2872 states to 2872 states and 4017 transitions. [2021-11-03 04:42:59,675 INFO L78 Accepts]: Start accepts. Automaton has 2872 states and 4017 transitions. Word has length 194 [2021-11-03 04:42:59,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:42:59,676 INFO L470 AbstractCegarLoop]: Abstraction has 2872 states and 4017 transitions. [2021-11-03 04:42:59,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 6 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:42:59,676 INFO L276 IsEmpty]: Start isEmpty. Operand 2872 states and 4017 transitions. [2021-11-03 04:42:59,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-03 04:42:59,678 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:42:59,679 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:42:59,696 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-11-03 04:42:59,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:42:59,882 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:42:59,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:42:59,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1834561464, now seen corresponding path program 1 times [2021-11-03 04:42:59,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:42:59,883 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [67351626] [2021-11-03 04:42:59,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:42:59,884 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:42:59,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:42:59,885 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:42:59,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-03 04:43:02,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:43:02,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:43:02,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:43:02,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:43:02,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:43:02,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:43:02,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:43:02,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:43:02,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:43:02,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:43:02,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:43:02,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:43:02,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:43:02,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:43:02,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:43:02,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:43:02,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:43:02,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:43:02,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:43:02,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:43:02,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:43:02,969 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 04:43:02,969 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 [2021-11-03 04:43:03,955 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:43:03,955 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 [2021-11-03 04:43:04,140 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 241 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 04:43:04,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:43:04,681 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 241 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 04:43:04,682 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:43:04,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [67351626] [2021-11-03 04:43:04,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [67351626] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:43:04,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:43:04,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:43:04,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847470453] [2021-11-03 04:43:04,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:43:04,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:43:04,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:43:04,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:43:04,683 INFO L87 Difference]: Start difference. First operand 2872 states and 4017 transitions. Second operand has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:43:29,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:43:29,524 INFO L93 Difference]: Finished difference Result 6759 states and 9558 transitions. [2021-11-03 04:43:29,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:43:29,525 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 0 states have call successors, (0), 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 195 [2021-11-03 04:43:29,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:43:29,530 INFO L225 Difference]: With dead ends: 6759 [2021-11-03 04:43:29,530 INFO L226 Difference]: Without dead ends: 3908 [2021-11-03 04:43:29,532 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:43:29,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3908 states. [2021-11-03 04:43:29,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3908 to 2881. [2021-11-03 04:43:29,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2881 states, 2880 states have (on average 1.3909722222222223) internal successors, (4006), 2880 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:43:29,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2881 states to 2881 states and 4006 transitions. [2021-11-03 04:43:29,699 INFO L78 Accepts]: Start accepts. Automaton has 2881 states and 4006 transitions. Word has length 195 [2021-11-03 04:43:29,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:43:29,700 INFO L470 AbstractCegarLoop]: Abstraction has 2881 states and 4006 transitions. [2021-11-03 04:43:29,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:43:29,700 INFO L276 IsEmpty]: Start isEmpty. Operand 2881 states and 4006 transitions. [2021-11-03 04:43:29,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-03 04:43:29,704 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:43:29,704 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:43:29,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-03 04:43:29,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:43:29,928 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:43:29,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:43:29,929 INFO L85 PathProgramCache]: Analyzing trace with hash 585189628, now seen corresponding path program 1 times [2021-11-03 04:43:29,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:43:29,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1758754186] [2021-11-03 04:43:29,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:43:29,930 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:43:29,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:43:29,931 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:43:29,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-03 04:43:32,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:43:32,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:43:32,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:43:32,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:43:32,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:43:32,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:43:32,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:43:32,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:43:32,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:43:32,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:43:32,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:43:32,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:43:32,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:43:32,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:43:32,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:43:32,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:43:32,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:43:32,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:43:32,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:43:32,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:43:32,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:43:33,067 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 04:43:33,067 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 [2021-11-03 04:43:34,231 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:43:34,231 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 [2021-11-03 04:43:34,428 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 246 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 04:43:34,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:43:34,946 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 246 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 04:43:34,946 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:43:34,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1758754186] [2021-11-03 04:43:34,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1758754186] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:43:34,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:43:34,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:43:34,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317813576] [2021-11-03 04:43:34,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:43:34,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:43:34,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:43:34,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:43:34,948 INFO L87 Difference]: Start difference. First operand 2881 states and 4006 transitions. Second operand has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:44:02,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:44:02,559 INFO L93 Difference]: Finished difference Result 6714 states and 9448 transitions. [2021-11-03 04:44:02,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:44:02,561 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 0 states have call successors, (0), 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 195 [2021-11-03 04:44:02,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:44:02,564 INFO L225 Difference]: With dead ends: 6714 [2021-11-03 04:44:02,564 INFO L226 Difference]: Without dead ends: 3854 [2021-11-03 04:44:02,566 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:44:02,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3854 states. [2021-11-03 04:44:02,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3854 to 2900. [2021-11-03 04:44:02,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2900 states, 2899 states have (on average 1.388064849948258) internal successors, (4024), 2899 states have internal predecessors, (4024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:44:02,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2900 states to 2900 states and 4024 transitions. [2021-11-03 04:44:02,724 INFO L78 Accepts]: Start accepts. Automaton has 2900 states and 4024 transitions. Word has length 195 [2021-11-03 04:44:02,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:44:02,724 INFO L470 AbstractCegarLoop]: Abstraction has 2900 states and 4024 transitions. [2021-11-03 04:44:02,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:44:02,724 INFO L276 IsEmpty]: Start isEmpty. Operand 2900 states and 4024 transitions. [2021-11-03 04:44:02,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-03 04:44:02,727 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:44:02,727 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:44:02,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-03 04:44:02,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:44:02,928 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:44:02,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:44:02,928 INFO L85 PathProgramCache]: Analyzing trace with hash -396295493, now seen corresponding path program 1 times [2021-11-03 04:44:02,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:44:02,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [128719818] [2021-11-03 04:44:02,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:44:02,930 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:44:02,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:44:02,930 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:44:02,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcf2ca4e-149c-4c67-a658-b12756f4260f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-03 04:44:05,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:44:05,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:44:05,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:44:06,001 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 162 treesize of output 138 [2021-11-03 04:44:06,005 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 138 treesize of output 90 [2021-11-03 04:44:06,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:44:06,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:44:06,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:44:06,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:44:06,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:44:06,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:44:06,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:44:06,013 INFO L190 IndexEqualityManager]: detected not equals via solver