./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.13.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_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/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_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/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_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/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 58a6b373d05d29cc87bb425c83b649cc4007a71cb802ce7ef5b6914b7a7817df --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:31:57,919 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:31:57,922 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:31:57,970 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:31:57,971 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:31:57,972 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:31:57,974 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:31:57,977 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:31:57,980 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:31:57,981 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:31:57,983 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:31:57,984 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:31:57,985 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:31:57,987 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:31:57,989 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:31:57,990 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:31:57,992 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:31:57,993 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:31:57,996 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:31:57,998 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:31:58,001 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:31:58,002 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:31:58,004 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:31:58,005 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:31:58,009 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:31:58,010 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:31:58,010 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:31:58,012 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:31:58,012 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:31:58,014 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:31:58,014 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:31:58,016 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:31:58,017 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:31:58,018 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:31:58,019 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:31:58,020 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:31:58,020 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:31:58,021 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:31:58,021 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:31:58,023 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:31:58,024 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:31:58,025 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 05:31:58,052 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:31:58,053 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:31:58,053 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:31:58,054 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:31:58,054 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:31:58,054 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:31:58,054 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:31:58,055 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:31:58,055 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:31:58,055 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:31:58,055 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:31:58,056 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:31:58,056 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:31:58,056 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:31:58,057 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:31:58,057 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:31:58,058 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:31:58,058 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:31:58,058 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:31:58,058 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:31:58,059 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:31:58,059 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:31:58,059 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:31:58,059 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:31:58,060 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:31:58,060 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:31:58,060 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:31:58,060 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:31:58,061 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:31:58,061 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:31:58,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:31:58,062 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:31:58,062 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:31:58,062 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:31:58,062 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:31:58,063 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:31:58,063 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:31:58,063 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:31:58,063 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:31:58,064 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_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 58a6b373d05d29cc87bb425c83b649cc4007a71cb802ce7ef5b6914b7a7817df [2021-11-03 05:31:58,305 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:31:58,335 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:31:58,337 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:31:58,338 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:31:58,339 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:31:58,340 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-1.c [2021-11-03 05:31:58,420 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/data/f688bd2e8/9972adc4876e45fc8e5334eb9e334a9c/FLAG7e3ef6580 [2021-11-03 05:31:58,984 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:31:58,985 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-1.c [2021-11-03 05:31:59,019 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/data/f688bd2e8/9972adc4876e45fc8e5334eb9e334a9c/FLAG7e3ef6580 [2021-11-03 05:31:59,237 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/data/f688bd2e8/9972adc4876e45fc8e5334eb9e334a9c [2021-11-03 05:31:59,240 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:31:59,243 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:31:59,246 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:31:59,246 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:31:59,249 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:31:59,251 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:31:59" (1/1) ... [2021-11-03 05:31:59,252 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f599a73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:31:59, skipping insertion in model container [2021-11-03 05:31:59,252 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:31:59" (1/1) ... [2021-11-03 05:31:59,259 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:31:59,335 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:31:59,787 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_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-1.c[74354,74367] [2021-11-03 05:31:59,796 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:31:59,811 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-03 05:31:59,812 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@e7816 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:31:59, skipping insertion in model container [2021-11-03 05:31:59,812 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:31:59,812 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 05:31:59,814 INFO L168 Benchmark]: Toolchain (without parser) took 570.15 ms. Allocated memory is still 98.6 MB. Free memory was 63.7 MB in the beginning and 64.9 MB in the end (delta: -1.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-03 05:31:59,815 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 98.6 MB. Free memory is still 51.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:31:59,816 INFO L168 Benchmark]: CACSL2BoogieTranslator took 566.58 ms. Allocated memory is still 98.6 MB. Free memory was 63.6 MB in the beginning and 64.9 MB in the end (delta: -1.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-03 05:31:59,818 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 98.6 MB. Free memory is still 51.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 566.58 ms. Allocated memory is still 98.6 MB. Free memory was 63.6 MB in the beginning and 64.9 MB in the end (delta: -1.4 MB). Peak memory consumption was 14.7 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_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/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_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/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_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/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 58a6b373d05d29cc87bb425c83b649cc4007a71cb802ce7ef5b6914b7a7817df --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:32:01,950 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:32:01,952 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:32:01,998 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:32:01,999 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:32:02,003 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:32:02,006 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:32:02,013 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:32:02,017 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:32:02,024 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:32:02,026 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:32:02,028 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:32:02,028 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:32:02,031 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:32:02,034 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:32:02,038 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:32:02,040 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:32:02,041 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:32:02,043 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:32:02,051 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:32:02,053 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:32:02,054 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:32:02,057 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:32:02,059 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:32:02,065 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:32:02,066 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:32:02,066 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:32:02,067 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:32:02,068 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:32:02,069 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:32:02,069 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:32:02,070 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:32:02,071 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:32:02,072 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:32:02,073 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:32:02,073 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:32:02,082 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:32:02,083 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:32:02,083 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:32:02,084 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:32:02,085 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:32:02,085 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-03 05:32:02,113 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:32:02,113 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:32:02,114 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:32:02,114 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:32:02,115 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:32:02,115 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:32:02,115 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:32:02,115 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:32:02,115 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:32:02,116 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:32:02,117 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:32:02,117 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:32:02,117 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:32:02,117 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:32:02,118 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:32:02,118 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:32:02,118 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:32:02,118 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 05:32:02,118 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 05:32:02,119 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:32:02,119 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:32:02,119 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:32:02,119 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:32:02,120 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:32:02,120 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 05:32:02,120 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:32:02,120 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:32:02,121 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:32:02,121 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:32:02,121 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:32:02,121 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 05:32:02,122 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 05:32:02,122 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:32:02,122 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:32:02,122 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:32:02,123 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_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 58a6b373d05d29cc87bb425c83b649cc4007a71cb802ce7ef5b6914b7a7817df [2021-11-03 05:32:02,534 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:32:02,554 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:32:02,556 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:32:02,558 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:32:02,558 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:32:02,559 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-1.c [2021-11-03 05:32:02,620 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/data/76f7e3975/530aef991bee41fab07bc20f10134204/FLAG615047e30 [2021-11-03 05:32:03,369 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:32:03,370 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-1.c [2021-11-03 05:32:03,400 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/data/76f7e3975/530aef991bee41fab07bc20f10134204/FLAG615047e30 [2021-11-03 05:32:03,532 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/data/76f7e3975/530aef991bee41fab07bc20f10134204 [2021-11-03 05:32:03,535 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:32:03,537 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:32:03,540 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:32:03,541 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:32:03,544 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:32:03,545 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:32:03" (1/1) ... [2021-11-03 05:32:03,546 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1266b018 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:32:03, skipping insertion in model container [2021-11-03 05:32:03,546 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:32:03" (1/1) ... [2021-11-03 05:32:03,565 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:32:03,650 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:32:04,075 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_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-1.c[74354,74367] [2021-11-03 05:32:04,085 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:32:04,102 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 05:32:04,114 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:32:04,234 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_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-1.c[74354,74367] [2021-11-03 05:32:04,252 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:32:04,266 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:32:04,429 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_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-1.c[74354,74367] [2021-11-03 05:32:04,431 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:32:04,450 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:32:04,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:32:04 WrapperNode [2021-11-03 05:32:04,451 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:32:04,453 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:32:04,453 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:32:04,453 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:32:04,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:32:04" (1/1) ... [2021-11-03 05:32:04,512 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:32:04" (1/1) ... [2021-11-03 05:32:04,569 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:32:04,569 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:32:04,570 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:32:04,570 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:32:04,578 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:32:04" (1/1) ... [2021-11-03 05:32:04,578 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:32:04" (1/1) ... [2021-11-03 05:32:04,586 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:32:04" (1/1) ... [2021-11-03 05:32:04,587 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:32:04" (1/1) ... [2021-11-03 05:32:04,628 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:32:04" (1/1) ... [2021-11-03 05:32:04,636 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:32:04" (1/1) ... [2021-11-03 05:32:04,655 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:32:04" (1/1) ... [2021-11-03 05:32:04,661 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:32:04,662 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:32:04,662 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:32:04,663 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:32:04,663 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:32:04" (1/1) ... [2021-11-03 05:32:04,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:32:04,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:32:04,706 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:32:04,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:32:04,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 05:32:04,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 05:32:04,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:32:04,754 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 05:32:04,755 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 05:32:04,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 05:32:04,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:32:04,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:32:04,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 05:32:04,988 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-03 05:32:15,329 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-03 05:32:15,329 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-03 05:32:15,337 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:32:15,338 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-03 05:32:15,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:32:15 BoogieIcfgContainer [2021-11-03 05:32:15,340 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:32:15,342 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:32:15,342 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:32:15,345 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:32:15,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:32:03" (1/3) ... [2021-11-03 05:32:15,346 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21ec5976 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:32:15, skipping insertion in model container [2021-11-03 05:32:15,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:32:04" (2/3) ... [2021-11-03 05:32:15,346 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21ec5976 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:32:15, skipping insertion in model container [2021-11-03 05:32:15,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:32:15" (3/3) ... [2021-11-03 05:32:15,348 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.13.i.cil-1.c [2021-11-03 05:32:15,353 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:32:15,353 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 05:32:15,401 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:32:15,407 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 05:32:15,407 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 05:32:15,425 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 05:32:15,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-03 05:32:15,433 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:32:15,433 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 05:32:15,434 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:32:15,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:32:15,447 INFO L85 PathProgramCache]: Analyzing trace with hash -442385417, now seen corresponding path program 1 times [2021-11-03 05:32:15,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:32:15,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1453770821] [2021-11-03 05:32:15,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:32:15,466 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:32:15,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:32:15,469 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:32:15,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 05:32:15,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:32:15,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:32:15,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:32:15,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:32:15,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:32:16,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:32:16,196 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:32:16,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1453770821] [2021-11-03 05:32:16,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1453770821] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:32:16,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:32:16,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:32:16,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690131337] [2021-11-03 05:32:16,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:32:16,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:32:16,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:32:16,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:32:16,220 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 05:32:16,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:32:16,444 INFO L93 Difference]: Finished difference Result 566 states and 965 transitions. [2021-11-03 05:32:16,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:32:16,447 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 05:32:16,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:32:16,474 INFO L225 Difference]: With dead ends: 566 [2021-11-03 05:32:16,474 INFO L226 Difference]: Without dead ends: 387 [2021-11-03 05:32:16,479 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 05:32:16,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-11-03 05:32:16,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 385. [2021-11-03 05:32:16,566 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 05:32:16,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 587 transitions. [2021-11-03 05:32:16,569 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 587 transitions. Word has length 37 [2021-11-03 05:32:16,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:32:16,570 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 587 transitions. [2021-11-03 05:32:16,570 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 05:32:16,571 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 587 transitions. [2021-11-03 05:32:16,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 05:32:16,574 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:32:16,575 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 05:32:16,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 05:32:16,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:32:16,793 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:32:16,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:32:16,794 INFO L85 PathProgramCache]: Analyzing trace with hash 457194935, now seen corresponding path program 1 times [2021-11-03 05:32:16,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:32:16,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1445564875] [2021-11-03 05:32:16,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:32:16,796 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:32:16,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:32:16,797 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:32:16,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 05:32:17,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:32:17,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:32:17,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:32:17,352 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 05:32:17,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:32:17,625 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 05:32:17,625 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:32:17,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1445564875] [2021-11-03 05:32:17,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1445564875] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:32:17,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:32:17,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:32:17,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561120220] [2021-11-03 05:32:17,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:32:17,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:32:17,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:32:17,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:32:17,629 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 05:32:18,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:32:18,451 INFO L93 Difference]: Finished difference Result 882 states and 1357 transitions. [2021-11-03 05:32:18,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:32:18,454 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 05:32:18,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:32:18,459 INFO L225 Difference]: With dead ends: 882 [2021-11-03 05:32:18,459 INFO L226 Difference]: Without dead ends: 631 [2021-11-03 05:32:18,461 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 05:32:18,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-11-03 05:32:18,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 629. [2021-11-03 05:32:18,491 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 05:32:18,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 956 transitions. [2021-11-03 05:32:18,495 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 956 transitions. Word has length 60 [2021-11-03 05:32:18,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:32:18,495 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 956 transitions. [2021-11-03 05:32:18,496 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 05:32:18,496 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 956 transitions. [2021-11-03 05:32:18,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-03 05:32:18,504 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:32:18,505 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] [2021-11-03 05:32:18,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 05:32:18,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:32:18,718 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:32:18,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:32:18,719 INFO L85 PathProgramCache]: Analyzing trace with hash 335691035, now seen corresponding path program 1 times [2021-11-03 05:32:18,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:32:18,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1065167378] [2021-11-03 05:32:18,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:32:18,722 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:32:18,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:32:18,723 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:32:18,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 05:32:19,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:32:19,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:32:19,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:32:19,464 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 05:32:19,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:32:19,844 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 05:32:19,844 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:32:19,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1065167378] [2021-11-03 05:32:19,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1065167378] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:32:19,844 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:32:19,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:32:19,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790372103] [2021-11-03 05:32:19,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:32:19,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:32:19,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:32:19,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:32:19,847 INFO L87 Difference]: Start difference. First operand 629 states and 956 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 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 05:32:20,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:32:20,179 INFO L93 Difference]: Finished difference Result 1370 states and 2096 transitions. [2021-11-03 05:32:20,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:32:20,179 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 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 112 [2021-11-03 05:32:20,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:32:20,186 INFO L225 Difference]: With dead ends: 1370 [2021-11-03 05:32:20,186 INFO L226 Difference]: Without dead ends: 875 [2021-11-03 05:32:20,187 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:32:20,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-11-03 05:32:20,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 875. [2021-11-03 05:32:20,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 1.5183066361556063) internal successors, (1327), 874 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:32:20,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1327 transitions. [2021-11-03 05:32:20,225 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1327 transitions. Word has length 112 [2021-11-03 05:32:20,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:32:20,225 INFO L470 AbstractCegarLoop]: Abstraction has 875 states and 1327 transitions. [2021-11-03 05:32:20,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 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 05:32:20,226 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1327 transitions. [2021-11-03 05:32:20,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-03 05:32:20,231 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:32:20,231 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:32:20,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 05:32:20,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:32:20,447 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:32:20,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:32:20,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1891434834, now seen corresponding path program 1 times [2021-11-03 05:32:20,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:32:20,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [472858371] [2021-11-03 05:32:20,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:32:20,451 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:32:20,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:32:20,452 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:32:20,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 05:32:20,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:32:20,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:32:20,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:32:21,375 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-03 05:32:21,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:32:21,806 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-03 05:32:21,806 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:32:21,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [472858371] [2021-11-03 05:32:21,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [472858371] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:32:21,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:32:21,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:32:21,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750928044] [2021-11-03 05:32:21,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:32:21,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:32:21,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:32:21,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:32:21,809 INFO L87 Difference]: Start difference. First operand 875 states and 1327 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:32:22,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:32:22,476 INFO L93 Difference]: Finished difference Result 1863 states and 2837 transitions. [2021-11-03 05:32:22,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:32:22,477 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 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 141 [2021-11-03 05:32:22,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:32:22,486 INFO L225 Difference]: With dead ends: 1863 [2021-11-03 05:32:22,486 INFO L226 Difference]: Without dead ends: 1122 [2021-11-03 05:32:22,487 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:32:22,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2021-11-03 05:32:22,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 1122. [2021-11-03 05:32:22,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 1.5138269402319358) internal successors, (1697), 1121 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:32:22,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 1697 transitions. [2021-11-03 05:32:22,543 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 1697 transitions. Word has length 141 [2021-11-03 05:32:22,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:32:22,545 INFO L470 AbstractCegarLoop]: Abstraction has 1122 states and 1697 transitions. [2021-11-03 05:32:22,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:32:22,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 1697 transitions. [2021-11-03 05:32:22,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-03 05:32:22,553 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:32:22,559 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] [2021-11-03 05:32:22,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 05:32:22,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:32:22,775 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:32:22,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:32:22,775 INFO L85 PathProgramCache]: Analyzing trace with hash -490932893, now seen corresponding path program 1 times [2021-11-03 05:32:22,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:32:22,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1969707048] [2021-11-03 05:32:22,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:32:22,778 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:32:22,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:32:22,779 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:32:22,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 05:32:23,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:32:23,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 05:32:23,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:32:23,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-03 05:32:23,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-03 05:32:24,091 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:32:24,095 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-03 05:32:24,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 221 treesize of output 210 [2021-11-03 05:32:24,675 INFO L354 Elim1Store]: treesize reduction 1607, result has 2.8 percent of original size [2021-11-03 05:32:24,676 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 849 treesize of output 821 [2021-11-03 05:32:24,865 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-03 05:32:24,866 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 05:32:24,877 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:32:24,879 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-03 05:32:24,887 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:32:24,889 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-11-03 05:32:24,900 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 05:32:24,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:24,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:24,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:24,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:24,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:24,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:24,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:24,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:24,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:24,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:24,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:24,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:24,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:24,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:24,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:24,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:24,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:24,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:24,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:24,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:24,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:24,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:24,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:24,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:24,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:24,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:24,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:24,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:24,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:24,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:24,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:24,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:24,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:24,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:24,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:24,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:24,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:24,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:24,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:24,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:24,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:24,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:25,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:25,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:25,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:25,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:25,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:25,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:25,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:25,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:25,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:25,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:25,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:25,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:25,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:25,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:25,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:25,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:25,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:25,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:25,049 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 05:32:25,162 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-03 05:32:25,163 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 05:32:25,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:25,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:25,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:25,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:25,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:25,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:25,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:25,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:25,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:25,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:25,197 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 05:32:25,232 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 05:32:25,237 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 05:32:25,699 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 05:32:25,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:32:26,312 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:32:26,318 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-11-03 05:32:26,323 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:32:26,331 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-03 05:32:26,486 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:32:26,488 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 393 [2021-11-03 05:32:26,496 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:32:26,498 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 510 [2021-11-03 05:32:26,512 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:32:26,515 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 687 [2021-11-03 05:32:26,529 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:32:26,533 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 744 [2021-11-03 05:32:26,558 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:32:26,562 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 861 [2021-11-03 05:32:26,586 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:32:26,591 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1038 [2021-11-03 05:32:27,078 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 05:32:27,078 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:32:27,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1969707048] [2021-11-03 05:32:27,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1969707048] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:32:27,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:32:27,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 05:32:27,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276586702] [2021-11-03 05:32:27,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:32:27,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:32:27,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:32:27,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:32:27,081 INFO L87 Difference]: Start difference. First operand 1122 states and 1697 transitions. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:32:54,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:32:54,146 INFO L93 Difference]: Finished difference Result 2241 states and 3390 transitions. [2021-11-03 05:32:54,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:32:54,149 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 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 05:32:54,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:32:54,158 INFO L225 Difference]: With dead ends: 2241 [2021-11-03 05:32:54,159 INFO L226 Difference]: Without dead ends: 1122 [2021-11-03 05:32:54,161 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 321 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 05:32:54,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2021-11-03 05:32:54,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 1122. [2021-11-03 05:32:54,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 1.512934879571811) internal successors, (1696), 1121 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:32:54,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 1696 transitions. [2021-11-03 05:32:54,217 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 1696 transitions. Word has length 165 [2021-11-03 05:32:54,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:32:54,220 INFO L470 AbstractCegarLoop]: Abstraction has 1122 states and 1696 transitions. [2021-11-03 05:32:54,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:32:54,221 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 1696 transitions. [2021-11-03 05:32:54,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-03 05:32:54,225 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:32:54,226 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] [2021-11-03 05:32:54,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 05:32:54,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:32:54,451 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:32:54,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:32:54,451 INFO L85 PathProgramCache]: Analyzing trace with hash 7623909, now seen corresponding path program 1 times [2021-11-03 05:32:54,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:32:54,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [234861610] [2021-11-03 05:32:54,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:32:54,453 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:32:54,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:32:54,453 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:32:54,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 05:32:55,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:32:55,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:32:55,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:32:55,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:55,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:55,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:55,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:55,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:32:55,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:32:55,796 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-03 05:32:55,796 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 05:32:55,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:32:55,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:32:55,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:32:56,218 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 05:32:56,218 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 05:32:57,658 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:32:57,659 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 05:32:57,964 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 05:32:57,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:32:58,662 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 05:32:58,662 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:32:58,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [234861610] [2021-11-03 05:32:58,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [234861610] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:32:58,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:32:58,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 05:32:58,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116649893] [2021-11-03 05:32:58,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:32:58,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:32:58,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:32:58,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:32:58,665 INFO L87 Difference]: Start difference. First operand 1122 states and 1696 transitions. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 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 05:33:52,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:33:52,423 INFO L93 Difference]: Finished difference Result 4230 states and 6420 transitions. [2021-11-03 05:33:52,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:33:52,425 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 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 165 [2021-11-03 05:33:52,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:33:52,445 INFO L225 Difference]: With dead ends: 4230 [2021-11-03 05:33:52,445 INFO L226 Difference]: Without dead ends: 3118 [2021-11-03 05:33:52,448 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 322 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 05:33:52,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3118 states. [2021-11-03 05:33:52,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3118 to 1346. [2021-11-03 05:33:52,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1346 states, 1345 states have (on average 1.5479553903345724) internal successors, (2082), 1345 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:33:52,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1346 states to 1346 states and 2082 transitions. [2021-11-03 05:33:52,559 INFO L78 Accepts]: Start accepts. Automaton has 1346 states and 2082 transitions. Word has length 165 [2021-11-03 05:33:52,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:33:52,559 INFO L470 AbstractCegarLoop]: Abstraction has 1346 states and 2082 transitions. [2021-11-03 05:33:52,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 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 05:33:52,560 INFO L276 IsEmpty]: Start isEmpty. Operand 1346 states and 2082 transitions. [2021-11-03 05:33:52,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-03 05:33:52,564 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:33:52,565 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] [2021-11-03 05:33:52,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 05:33:52,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:33:52,786 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:33:52,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:33:52,786 INFO L85 PathProgramCache]: Analyzing trace with hash -2042784989, now seen corresponding path program 1 times [2021-11-03 05:33:52,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:33:52,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1843585494] [2021-11-03 05:33:52,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:33:52,788 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:33:52,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:33:52,800 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:33:52,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 05:33:53,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:33:53,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:33:53,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:33:54,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:33:54,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:33:54,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:33:54,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:33:54,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:33:54,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:33:54,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:33:54,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:33:54,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:33:54,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:33:54,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:33:54,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:33:54,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:33:54,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:33:54,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:33:54,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:33:54,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:33:54,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:33:54,471 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 05:33:54,471 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 05:33:56,286 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:33:56,287 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 05:33:56,444 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 05:33:56,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:33:56,959 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 05:33:56,959 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:33:56,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1843585494] [2021-11-03 05:33:56,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1843585494] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:33:56,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:33:56,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 05:33:56,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734559585] [2021-11-03 05:33:56,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:33:56,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:33:56,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:33:56,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:33:56,961 INFO L87 Difference]: Start difference. First operand 1346 states and 2082 transitions. Second operand has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:34:15,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:34:15,608 INFO L93 Difference]: Finished difference Result 3254 states and 5034 transitions. [2021-11-03 05:34:15,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:34:15,613 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 0 states have call successors, (0), 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 05:34:15,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:34:15,625 INFO L225 Difference]: With dead ends: 3254 [2021-11-03 05:34:15,625 INFO L226 Difference]: Without dead ends: 1918 [2021-11-03 05:34:15,627 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 324 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 05:34:15,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2021-11-03 05:34:15,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1598. [2021-11-03 05:34:15,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1598 states, 1597 states have (on average 1.5798371947401377) internal successors, (2523), 1597 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:34:15,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1598 states to 1598 states and 2523 transitions. [2021-11-03 05:34:15,728 INFO L78 Accepts]: Start accepts. Automaton has 1598 states and 2523 transitions. Word has length 165 [2021-11-03 05:34:15,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:34:15,729 INFO L470 AbstractCegarLoop]: Abstraction has 1598 states and 2523 transitions. [2021-11-03 05:34:15,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:34:15,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1598 states and 2523 transitions. [2021-11-03 05:34:15,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-03 05:34:15,736 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:34:15,737 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] [2021-11-03 05:34:15,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 05:34:15,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:34:15,958 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:34:15,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:34:15,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1123899760, now seen corresponding path program 1 times [2021-11-03 05:34:15,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:34:15,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [519467155] [2021-11-03 05:34:15,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:34:15,960 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:34:15,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:34:15,960 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:34:15,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 05:34:17,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:34:17,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:34:17,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:34:17,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:34:17,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:34:17,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:34:17,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:34:17,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:34:17,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:34:17,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:34:17,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:34:17,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:34:17,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:34:17,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:34:17,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:34:17,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:34:17,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:34:17,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:34:17,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:34:17,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:34:17,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:34:17,779 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 05:34:17,779 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 05:34:18,581 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:34:18,581 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 05:34:18,786 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 05:34:18,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:34:19,287 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 05:34:19,287 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:34:19,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [519467155] [2021-11-03 05:34:19,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [519467155] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:34:19,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:34:19,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:34:19,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128587857] [2021-11-03 05:34:19,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:34:19,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:34:19,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:34:19,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:34:19,289 INFO L87 Difference]: Start difference. First operand 1598 states and 2523 transitions. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:34:50,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:34:50,772 INFO L93 Difference]: Finished difference Result 4742 states and 7402 transitions. [2021-11-03 05:34:50,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:34:50,776 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 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 178 [2021-11-03 05:34:50,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:34:50,794 INFO L225 Difference]: With dead ends: 4742 [2021-11-03 05:34:50,794 INFO L226 Difference]: Without dead ends: 3154 [2021-11-03 05:34:50,797 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 350 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 05:34:50,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3154 states. [2021-11-03 05:34:51,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3154 to 1870. [2021-11-03 05:34:51,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1869 states have (on average 1.5815944355270197) internal successors, (2956), 1869 states have internal predecessors, (2956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:34:51,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 2956 transitions. [2021-11-03 05:34:51,044 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 2956 transitions. Word has length 178 [2021-11-03 05:34:51,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:34:51,045 INFO L470 AbstractCegarLoop]: Abstraction has 1870 states and 2956 transitions. [2021-11-03 05:34:51,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:34:51,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 2956 transitions. [2021-11-03 05:34:51,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-03 05:34:51,050 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:34:51,051 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] [2021-11-03 05:34:51,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 05:34:51,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:34:51,275 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:34:51,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:34:51,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1047988863, now seen corresponding path program 1 times [2021-11-03 05:34:51,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:34:51,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [160805060] [2021-11-03 05:34:51,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:34:51,277 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:34:51,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:34:51,279 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:34:51,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 05:34:52,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:34:52,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:34:52,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:34:53,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:34:53,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:34:53,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:34:53,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:34:53,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:34:53,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:34:53,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:34:53,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:34:53,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:34:53,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:34:53,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:34:53,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:34:53,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:34:53,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:34:53,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:34:53,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:34:53,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:34:53,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:34:53,543 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 05:34:53,543 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 05:34:53,981 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:34:53,982 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 05:34:54,200 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 05:34:54,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:34:54,660 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 05:34:54,660 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:34:54,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [160805060] [2021-11-03 05:34:54,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [160805060] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:34:54,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:34:54,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:34:54,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560116509] [2021-11-03 05:34:54,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:34:54,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:34:54,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:34:54,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:34:54,662 INFO L87 Difference]: Start difference. First operand 1870 states and 2956 transitions. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:35:33,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:35:33,967 INFO L93 Difference]: Finished difference Result 5149 states and 8034 transitions. [2021-11-03 05:35:33,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:35:33,969 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 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 179 [2021-11-03 05:35:33,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:35:33,992 INFO L225 Difference]: With dead ends: 5149 [2021-11-03 05:35:33,992 INFO L226 Difference]: Without dead ends: 3289 [2021-11-03 05:35:33,995 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 352 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 05:35:34,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3289 states. [2021-11-03 05:35:34,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3289 to 1978. [2021-11-03 05:35:34,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1977 states have (on average 1.5594334850784015) internal successors, (3083), 1977 states have internal predecessors, (3083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:35:34,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 3083 transitions. [2021-11-03 05:35:34,167 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 3083 transitions. Word has length 179 [2021-11-03 05:35:34,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:35:34,168 INFO L470 AbstractCegarLoop]: Abstraction has 1978 states and 3083 transitions. [2021-11-03 05:35:34,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:35:34,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 3083 transitions. [2021-11-03 05:35:34,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-03 05:35:34,175 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:35:34,175 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] [2021-11-03 05:35:34,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 05:35:34,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:35:34,392 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:35:34,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:35:34,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1895629075, now seen corresponding path program 1 times [2021-11-03 05:35:34,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:35:34,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1694055322] [2021-11-03 05:35:34,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:35:34,394 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:35:34,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:35:34,395 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:35:34,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 05:35:36,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:35:36,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:35:36,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:35:36,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:35:36,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:35:36,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:35:36,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:35:36,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:35:36,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:35:36,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:35:36,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:35:36,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:35:36,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:35:36,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:35:36,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:35:36,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:35:36,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:35:36,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:35:36,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:35:36,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:35:36,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:35:36,854 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 05:35:36,854 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 05:35:37,340 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:35:37,341 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 05:35:37,575 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 05:35:37,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:35:38,131 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 05:35:38,131 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:35:38,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1694055322] [2021-11-03 05:35:38,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1694055322] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:35:38,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:35:38,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:35:38,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150998972] [2021-11-03 05:35:38,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:35:38,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:35:38,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:35:38,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:35:38,133 INFO L87 Difference]: Start difference. First operand 1978 states and 3083 transitions. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:36:23,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:36:23,446 INFO L93 Difference]: Finished difference Result 5464 states and 8432 transitions. [2021-11-03 05:36:23,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:36:23,461 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 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 179 [2021-11-03 05:36:23,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:36:23,478 INFO L225 Difference]: With dead ends: 5464 [2021-11-03 05:36:23,478 INFO L226 Difference]: Without dead ends: 3496 [2021-11-03 05:36:23,481 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 352 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 05:36:23,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3496 states. [2021-11-03 05:36:23,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3496 to 2185. [2021-11-03 05:36:23,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2185 states, 2184 states have (on average 1.539835164835165) internal successors, (3363), 2184 states have internal predecessors, (3363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:36:23,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2185 states to 2185 states and 3363 transitions. [2021-11-03 05:36:23,704 INFO L78 Accepts]: Start accepts. Automaton has 2185 states and 3363 transitions. Word has length 179 [2021-11-03 05:36:23,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:36:23,706 INFO L470 AbstractCegarLoop]: Abstraction has 2185 states and 3363 transitions. [2021-11-03 05:36:23,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:36:23,707 INFO L276 IsEmpty]: Start isEmpty. Operand 2185 states and 3363 transitions. [2021-11-03 05:36:23,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-03 05:36:23,719 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:36:23,719 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] [2021-11-03 05:36:23,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-11-03 05:36:23,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:36:23,921 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:36:23,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:36:23,921 INFO L85 PathProgramCache]: Analyzing trace with hash -892296342, now seen corresponding path program 1 times [2021-11-03 05:36:23,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:36:23,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [194002045] [2021-11-03 05:36:23,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:36:23,922 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:36:23,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:36:23,923 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:36:23,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 05:36:25,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:36:25,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:36:25,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:36:25,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:36:25,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:36:25,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:36:25,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:36:25,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:36:25,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:36:25,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:36:25,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:36:25,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:36:25,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:36:25,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:36:25,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:36:25,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:36:25,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:36:25,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:36:25,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:36:25,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:36:25,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:36:26,344 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 05:36:26,344 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 05:36:27,297 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:36:27,297 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 05:36:27,508 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 05:36:27,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:36:28,035 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 05:36:28,036 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:36:28,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [194002045] [2021-11-03 05:36:28,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [194002045] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:36:28,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:36:28,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:36:28,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401900294] [2021-11-03 05:36:28,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:36:28,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:36:28,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:36:28,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:36:28,039 INFO L87 Difference]: Start difference. First operand 2185 states and 3363 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 05:37:05,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:37:05,964 INFO L93 Difference]: Finished difference Result 5545 states and 8461 transitions. [2021-11-03 05:37:05,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:37:05,966 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 179 [2021-11-03 05:37:05,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:37:05,982 INFO L225 Difference]: With dead ends: 5545 [2021-11-03 05:37:05,982 INFO L226 Difference]: Without dead ends: 3370 [2021-11-03 05:37:05,985 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 352 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 05:37:05,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3370 states. [2021-11-03 05:37:06,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3370 to 2201. [2021-11-03 05:37:06,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2201 states, 2200 states have (on average 1.5313636363636363) internal successors, (3369), 2200 states have internal predecessors, (3369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:37:06,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2201 states to 2201 states and 3369 transitions. [2021-11-03 05:37:06,179 INFO L78 Accepts]: Start accepts. Automaton has 2201 states and 3369 transitions. Word has length 179 [2021-11-03 05:37:06,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:37:06,180 INFO L470 AbstractCegarLoop]: Abstraction has 2201 states and 3369 transitions. [2021-11-03 05:37:06,180 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 05:37:06,181 INFO L276 IsEmpty]: Start isEmpty. Operand 2201 states and 3369 transitions. [2021-11-03 05:37:06,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-03 05:37:06,187 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:37:06,187 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] [2021-11-03 05:37:06,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 05:37:06,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:37:06,392 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:37:06,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:37:06,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1478052906, now seen corresponding path program 1 times [2021-11-03 05:37:06,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:37:06,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [146660125] [2021-11-03 05:37:06,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:37:06,404 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:37:06,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:37:06,405 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:37:06,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 05:37:08,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:37:08,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:37:08,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:37:08,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:37:08,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:37:08,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:37:08,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:37:08,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:37:08,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:37:08,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:37:08,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:37:08,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:37:08,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:37:08,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:37:08,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:37:08,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:37:08,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:37:08,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:37:08,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:37:08,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:37:08,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:37:08,987 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 05:37:08,988 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 05:37:09,806 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:37:09,806 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 05:37:10,019 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 05:37:10,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:37:10,554 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 05:37:10,554 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:37:10,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [146660125] [2021-11-03 05:37:10,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [146660125] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:37:10,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:37:10,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:37:10,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296381807] [2021-11-03 05:37:10,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:37:10,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:37:10,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:37:10,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:37:10,557 INFO L87 Difference]: Start difference. First operand 2201 states and 3369 transitions. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:37:53,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:37:53,473 INFO L93 Difference]: Finished difference Result 5543 states and 8423 transitions. [2021-11-03 05:37:53,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:37:53,475 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 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 179 [2021-11-03 05:37:53,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:37:53,494 INFO L225 Difference]: With dead ends: 5543 [2021-11-03 05:37:53,495 INFO L226 Difference]: Without dead ends: 3352 [2021-11-03 05:37:53,497 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 352 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 05:37:53,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3352 states. [2021-11-03 05:37:53,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3352 to 2201. [2021-11-03 05:37:53,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2201 states, 2200 states have (on average 1.5195454545454545) internal successors, (3343), 2200 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:37:53,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2201 states to 2201 states and 3343 transitions. [2021-11-03 05:37:53,701 INFO L78 Accepts]: Start accepts. Automaton has 2201 states and 3343 transitions. Word has length 179 [2021-11-03 05:37:53,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:37:53,702 INFO L470 AbstractCegarLoop]: Abstraction has 2201 states and 3343 transitions. [2021-11-03 05:37:53,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:37:53,702 INFO L276 IsEmpty]: Start isEmpty. Operand 2201 states and 3343 transitions. [2021-11-03 05:37:53,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-03 05:37:53,721 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:37:53,722 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] [2021-11-03 05:37:53,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 05:37:53,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:37:53,948 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:37:53,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:37:53,949 INFO L85 PathProgramCache]: Analyzing trace with hash -704993927, now seen corresponding path program 1 times [2021-11-03 05:37:53,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:37:53,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [579500459] [2021-11-03 05:37:53,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:37:53,950 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:37:53,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:37:53,951 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:37:53,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 05:37:56,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:37:56,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:37:56,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:37:56,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:37:56,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:37:56,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:37:56,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:37:56,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:37:56,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:37:56,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:37:56,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:37:56,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:37:56,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:37:56,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:37:56,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:37:56,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:37:56,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:37:56,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:37:56,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:37:56,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:37:56,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:37:56,868 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 05:37:56,869 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 05:37:57,422 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:37:57,423 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 05:37:57,667 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 05:37:57,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:37:58,192 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 05:37:58,192 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:37:58,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [579500459] [2021-11-03 05:37:58,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [579500459] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:37:58,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:37:58,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:37:58,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520544000] [2021-11-03 05:37:58,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:37:58,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:37:58,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:37:58,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:37:58,194 INFO L87 Difference]: Start difference. First operand 2201 states and 3343 transitions. Second operand has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:38:28,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:38:28,262 INFO L93 Difference]: Finished difference Result 5655 states and 8556 transitions. [2021-11-03 05:38:28,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:38:28,264 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 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 180 [2021-11-03 05:38:28,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:38:28,274 INFO L225 Difference]: With dead ends: 5655 [2021-11-03 05:38:28,274 INFO L226 Difference]: Without dead ends: 3464 [2021-11-03 05:38:28,277 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 354 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 05:38:28,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3464 states. [2021-11-03 05:38:28,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3464 to 2214. [2021-11-03 05:38:28,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2214 states, 2213 states have (on average 1.5051965657478537) internal successors, (3331), 2213 states have internal predecessors, (3331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:38:28,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2214 states to 2214 states and 3331 transitions. [2021-11-03 05:38:28,463 INFO L78 Accepts]: Start accepts. Automaton has 2214 states and 3331 transitions. Word has length 180 [2021-11-03 05:38:28,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:38:28,464 INFO L470 AbstractCegarLoop]: Abstraction has 2214 states and 3331 transitions. [2021-11-03 05:38:28,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:38:28,465 INFO L276 IsEmpty]: Start isEmpty. Operand 2214 states and 3331 transitions. [2021-11-03 05:38:28,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-03 05:38:28,471 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:38:28,471 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] [2021-11-03 05:38:28,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 05:38:28,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:38:28,684 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:38:28,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:38:28,685 INFO L85 PathProgramCache]: Analyzing trace with hash 320365464, now seen corresponding path program 1 times [2021-11-03 05:38:28,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:38:28,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [598490439] [2021-11-03 05:38:28,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:38:28,686 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:38:28,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:38:28,687 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:38:28,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 05:38:31,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:38:31,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:38:31,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:38:31,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:38:31,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:38:31,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:38:31,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:38:31,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:38:31,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:38:31,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:38:31,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:38:31,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:38:31,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:38:31,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:38:31,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:38:31,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:38:31,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:38:31,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:38:31,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:38:31,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:38:31,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:38:31,904 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 05:38:31,904 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 05:38:32,549 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:38:32,549 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 05:38:32,842 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 05:38:32,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:38:33,455 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 05:38:33,455 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:38:33,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [598490439] [2021-11-03 05:38:33,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [598490439] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:38:33,455 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:38:33,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:38:33,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483606338] [2021-11-03 05:38:33,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:38:33,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:38:33,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:38:33,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:38:33,457 INFO L87 Difference]: Start difference. First operand 2214 states and 3331 transitions. Second operand has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:39:06,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:39:06,159 INFO L93 Difference]: Finished difference Result 5664 states and 8504 transitions. [2021-11-03 05:39:06,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:39:06,160 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 0 states have call successors, (0), 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 181 [2021-11-03 05:39:06,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:39:06,169 INFO L225 Difference]: With dead ends: 5664 [2021-11-03 05:39:06,169 INFO L226 Difference]: Without dead ends: 3464 [2021-11-03 05:39:06,171 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 356 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 05:39:06,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3464 states. [2021-11-03 05:39:06,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3464 to 2223. [2021-11-03 05:39:06,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2223 states, 2222 states have (on average 1.4914491449144915) internal successors, (3314), 2222 states have internal predecessors, (3314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:39:06,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 3314 transitions. [2021-11-03 05:39:06,345 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 3314 transitions. Word has length 181 [2021-11-03 05:39:06,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:39:06,346 INFO L470 AbstractCegarLoop]: Abstraction has 2223 states and 3314 transitions. [2021-11-03 05:39:06,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:39:06,346 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 3314 transitions. [2021-11-03 05:39:06,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-03 05:39:06,353 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:39:06,353 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] [2021-11-03 05:39:06,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-03 05:39:06,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:39:06,576 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:39:06,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:39:06,577 INFO L85 PathProgramCache]: Analyzing trace with hash 2082029342, now seen corresponding path program 1 times [2021-11-03 05:39:06,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:39:06,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [978284957] [2021-11-03 05:39:06,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:39:06,578 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:39:06,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:39:06,579 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:39:06,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 05:39:08,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:39:08,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:39:08,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:39:09,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:39:09,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:39:09,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:39:09,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:39:09,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:39:09,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:39:09,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:39:09,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:39:09,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:39:09,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:39:09,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:39:09,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:39:09,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:39:09,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:39:09,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:39:09,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:39:09,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:39:09,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:39:09,597 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 05:39:09,598 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 05:39:10,481 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:39:10,482 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 05:39:10,763 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 05:39:10,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:39:11,349 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 05:39:11,349 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:39:11,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [978284957] [2021-11-03 05:39:11,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [978284957] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:39:11,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:39:11,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:39:11,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933409989] [2021-11-03 05:39:11,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:39:11,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:39:11,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:39:11,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:39:11,352 INFO L87 Difference]: Start difference. First operand 2223 states and 3314 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 05:39:50,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:39:50,764 INFO L93 Difference]: Finished difference Result 5493 states and 8191 transitions. [2021-11-03 05:39:50,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:39:50,766 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 182 [2021-11-03 05:39:50,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:39:50,774 INFO L225 Difference]: With dead ends: 5493 [2021-11-03 05:39:50,774 INFO L226 Difference]: Without dead ends: 3284 [2021-11-03 05:39:50,776 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 358 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 05:39:50,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3284 states. [2021-11-03 05:39:51,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3284 to 2223. [2021-11-03 05:39:51,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2223 states, 2222 states have (on average 1.4756975697569756) internal successors, (3279), 2222 states have internal predecessors, (3279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:39:51,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 3279 transitions. [2021-11-03 05:39:51,067 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 3279 transitions. Word has length 182 [2021-11-03 05:39:51,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:39:51,068 INFO L470 AbstractCegarLoop]: Abstraction has 2223 states and 3279 transitions. [2021-11-03 05:39:51,069 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 05:39:51,069 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 3279 transitions. [2021-11-03 05:39:51,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-03 05:39:51,074 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:39:51,075 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] [2021-11-03 05:39:51,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 05:39:51,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:39:51,298 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:39:51,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:39:51,298 INFO L85 PathProgramCache]: Analyzing trace with hash 51593096, now seen corresponding path program 1 times [2021-11-03 05:39:51,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:39:51,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1500253720] [2021-11-03 05:39:51,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:39:51,300 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:39:51,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:39:51,301 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:39:51,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 05:39:53,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:39:53,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:39:53,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:39:53,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:39:53,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:39:53,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:39:53,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:39:53,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:39:53,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:39:53,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:39:53,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:39:53,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:39:53,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:39:53,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:39:53,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:39:53,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:39:53,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:39:53,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:39:53,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:39:53,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:39:53,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:39:54,321 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 05:39:54,322 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 05:39:55,333 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:39:55,334 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 05:39:55,559 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 05:39:55,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:39:56,112 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 05:39:56,112 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:39:56,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1500253720] [2021-11-03 05:39:56,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1500253720] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:39:56,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:39:56,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:39:56,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471971565] [2021-11-03 05:39:56,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:39:56,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:39:56,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:39:56,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:39:56,115 INFO L87 Difference]: Start difference. First operand 2223 states and 3279 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 05:40:44,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:40:44,345 INFO L93 Difference]: Finished difference Result 5463 states and 8067 transitions. [2021-11-03 05:40:44,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:40:44,353 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 182 [2021-11-03 05:40:44,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:40:44,358 INFO L225 Difference]: With dead ends: 5463 [2021-11-03 05:40:44,359 INFO L226 Difference]: Without dead ends: 3500 [2021-11-03 05:40:44,361 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 358 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 05:40:44,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3500 states. [2021-11-03 05:40:44,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3500 to 2402. [2021-11-03 05:40:44,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2402 states, 2401 states have (on average 1.4552269887546856) internal successors, (3494), 2401 states have internal predecessors, (3494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:40:44,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2402 states to 2402 states and 3494 transitions. [2021-11-03 05:40:44,699 INFO L78 Accepts]: Start accepts. Automaton has 2402 states and 3494 transitions. Word has length 182 [2021-11-03 05:40:44,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:40:44,699 INFO L470 AbstractCegarLoop]: Abstraction has 2402 states and 3494 transitions. [2021-11-03 05:40:44,700 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 05:40:44,700 INFO L276 IsEmpty]: Start isEmpty. Operand 2402 states and 3494 transitions. [2021-11-03 05:40:44,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-03 05:40:44,705 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:40:44,706 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] [2021-11-03 05:40:44,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-03 05:40:44,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:40:44,925 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:40:44,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:40:44,926 INFO L85 PathProgramCache]: Analyzing trace with hash 525669319, now seen corresponding path program 1 times [2021-11-03 05:40:44,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:40:44,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1089674736] [2021-11-03 05:40:44,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:40:44,927 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:40:44,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:40:44,928 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:40:44,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 05:40:47,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:40:47,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:40:47,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:40:47,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:40:47,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:40:47,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:40:47,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:40:47,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:40:47,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:40:47,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:40:47,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:40:47,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:40:47,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:40:47,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:40:47,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:40:47,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:40:47,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:40:47,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:40:47,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:40:47,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:40:47,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:40:48,075 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 05:40:48,075 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 05:40:49,188 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:40:49,188 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 05:40:49,401 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 05:40:49,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:40:49,962 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 05:40:49,963 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:40:49,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1089674736] [2021-11-03 05:40:49,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1089674736] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:40:49,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:40:49,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:40:49,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568738706] [2021-11-03 05:40:49,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:40:49,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:40:49,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:40:49,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:40:49,965 INFO L87 Difference]: Start difference. First operand 2402 states and 3494 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 05:41:25,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:41:25,632 INFO L93 Difference]: Finished difference Result 5629 states and 8240 transitions. [2021-11-03 05:41:25,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:41:25,637 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 183 [2021-11-03 05:41:25,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:41:25,645 INFO L225 Difference]: With dead ends: 5629 [2021-11-03 05:41:25,646 INFO L226 Difference]: Without dead ends: 3507 [2021-11-03 05:41:25,648 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 360 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 05:41:25,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3507 states. [2021-11-03 05:41:25,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3507 to 2426. [2021-11-03 05:41:25,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2426 states, 2425 states have (on average 1.447422680412371) internal successors, (3510), 2425 states have internal predecessors, (3510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:41:25,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2426 states to 2426 states and 3510 transitions. [2021-11-03 05:41:25,882 INFO L78 Accepts]: Start accepts. Automaton has 2426 states and 3510 transitions. Word has length 183 [2021-11-03 05:41:25,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:41:25,883 INFO L470 AbstractCegarLoop]: Abstraction has 2426 states and 3510 transitions. [2021-11-03 05:41:25,883 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 05:41:25,884 INFO L276 IsEmpty]: Start isEmpty. Operand 2426 states and 3510 transitions. [2021-11-03 05:41:25,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-03 05:41:25,888 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:41:25,889 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] [2021-11-03 05:41:25,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-03 05:41:26,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:41:26,100 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:41:26,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:41:26,101 INFO L85 PathProgramCache]: Analyzing trace with hash -81246291, now seen corresponding path program 1 times [2021-11-03 05:41:26,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:41:26,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [876499887] [2021-11-03 05:41:26,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:41:26,103 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:41:26,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:41:26,105 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:41:26,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 05:41:28,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:41:28,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:41:28,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:41:29,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:41:29,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:41:29,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:41:29,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:41:29,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:41:29,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:41:29,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:41:29,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:41:29,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:41:29,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:41:29,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:41:29,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:41:29,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:41:29,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:41:29,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:41:29,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:41:29,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:41:29,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:41:29,645 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 05:41:29,646 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 05:41:30,751 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:41:30,751 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 05:41:30,981 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 05:41:30,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:41:31,567 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 05:41:31,567 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:41:31,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [876499887] [2021-11-03 05:41:31,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [876499887] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:41:31,568 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:41:31,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:41:31,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425803940] [2021-11-03 05:41:31,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:41:31,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:41:31,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:41:31,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:41:31,570 INFO L87 Difference]: Start difference. First operand 2426 states and 3510 transitions. Second operand has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:42:05,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:42:05,546 INFO L93 Difference]: Finished difference Result 5798 states and 8415 transitions. [2021-11-03 05:42:05,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:42:05,548 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 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 184 [2021-11-03 05:42:05,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:42:05,577 INFO L225 Difference]: With dead ends: 5798 [2021-11-03 05:42:05,578 INFO L226 Difference]: Without dead ends: 3661 [2021-11-03 05:42:05,581 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 362 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 05:42:05,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3661 states. [2021-11-03 05:42:05,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3661 to 2623. [2021-11-03 05:42:05,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2623 states, 2622 states have (on average 1.4275362318840579) internal successors, (3743), 2622 states have internal predecessors, (3743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:42:05,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2623 states to 2623 states and 3743 transitions. [2021-11-03 05:42:05,895 INFO L78 Accepts]: Start accepts. Automaton has 2623 states and 3743 transitions. Word has length 184 [2021-11-03 05:42:05,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:42:05,896 INFO L470 AbstractCegarLoop]: Abstraction has 2623 states and 3743 transitions. [2021-11-03 05:42:05,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:42:05,896 INFO L276 IsEmpty]: Start isEmpty. Operand 2623 states and 3743 transitions. [2021-11-03 05:42:05,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-03 05:42:05,899 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:42:05,899 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] [2021-11-03 05:42:05,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-03 05:42:06,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:42:06,100 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:42:06,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:42:06,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1756566683, now seen corresponding path program 1 times [2021-11-03 05:42:06,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:42:06,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [263977491] [2021-11-03 05:42:06,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:42:06,103 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:42:06,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:42:06,104 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:42:06,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-03 05:42:08,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:42:08,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:42:08,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:42:09,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:42:09,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:42:09,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:42:09,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:42:09,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:42:09,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:42:09,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:42:09,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:42:09,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:42:09,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:42:09,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:42:09,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:42:09,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:42:09,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:42:09,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:42:09,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:42:09,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:42:09,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:42:09,559 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 05:42:09,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-03 05:42:10,732 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:42:10,733 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 05:42:10,950 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 05:42:10,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:42:11,514 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 05:42:11,514 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:42:11,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [263977491] [2021-11-03 05:42:11,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [263977491] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:42:11,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:42:11,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:42:11,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314227240] [2021-11-03 05:42:11,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:42:11,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:42:11,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:42:11,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:42:11,517 INFO L87 Difference]: Start difference. First operand 2623 states and 3743 transitions. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:42:44,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:42:44,802 INFO L93 Difference]: Finished difference Result 6428 states and 9210 transitions. [2021-11-03 05:42:44,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:42:44,804 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 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 05:42:44,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:42:44,810 INFO L225 Difference]: With dead ends: 6428 [2021-11-03 05:42:44,810 INFO L226 Difference]: Without dead ends: 3826 [2021-11-03 05:42:44,828 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 368 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 05:42:44,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3826 states. [2021-11-03 05:42:45,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3826 to 2807. [2021-11-03 05:42:45,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2807 states, 2806 states have (on average 1.410192444761226) internal successors, (3957), 2806 states have internal predecessors, (3957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:42:45,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2807 states to 2807 states and 3957 transitions. [2021-11-03 05:42:45,094 INFO L78 Accepts]: Start accepts. Automaton has 2807 states and 3957 transitions. Word has length 187 [2021-11-03 05:42:45,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:42:45,095 INFO L470 AbstractCegarLoop]: Abstraction has 2807 states and 3957 transitions. [2021-11-03 05:42:45,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:42:45,095 INFO L276 IsEmpty]: Start isEmpty. Operand 2807 states and 3957 transitions. [2021-11-03 05:42:45,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-03 05:42:45,144 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:42:45,144 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] [2021-11-03 05:42:45,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-03 05:42:45,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:42:45,345 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:42:45,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:42:45,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1708017185, now seen corresponding path program 1 times [2021-11-03 05:42:45,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:42:45,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2114442818] [2021-11-03 05:42:45,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:42:45,347 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:42:45,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:42:45,348 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:42:45,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-03 05:42:48,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:42:48,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:42:48,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:42:48,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:42:48,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:42:48,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:42:48,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:42:48,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:42:48,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:42:48,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:42:48,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:42:48,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:42:48,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:42:48,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:42:48,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:42:48,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:42:48,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:42:48,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:42:48,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:42:48,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:42:48,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:42:48,987 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 05:42:48,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-03 05:42:50,286 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:42:50,286 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 05:42:50,508 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 05:42:50,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:42:51,112 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 05:42:51,112 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:42:51,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2114442818] [2021-11-03 05:42:51,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2114442818] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:42:51,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:42:51,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:42:51,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138106984] [2021-11-03 05:42:51,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:42:51,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:42:51,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:42:51,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:42:51,115 INFO L87 Difference]: Start difference. First operand 2807 states and 3957 transitions. Second operand has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 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 05:43:21,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:43:21,001 INFO L93 Difference]: Finished difference Result 6558 states and 9322 transitions. [2021-11-03 05:43:21,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:43:21,003 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 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 188 [2021-11-03 05:43:21,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:43:21,006 INFO L225 Difference]: With dead ends: 6558 [2021-11-03 05:43:21,006 INFO L226 Difference]: Without dead ends: 3772 [2021-11-03 05:43:21,009 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 05:43:21,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3772 states. [2021-11-03 05:43:21,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3772 to 2815. [2021-11-03 05:43:21,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2815 states, 2814 states have (on average 1.4026297085998578) internal successors, (3947), 2814 states have internal predecessors, (3947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:21,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2815 states to 2815 states and 3947 transitions. [2021-11-03 05:43:21,332 INFO L78 Accepts]: Start accepts. Automaton has 2815 states and 3947 transitions. Word has length 188 [2021-11-03 05:43:21,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:43:21,332 INFO L470 AbstractCegarLoop]: Abstraction has 2815 states and 3947 transitions. [2021-11-03 05:43:21,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 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 05:43:21,348 INFO L276 IsEmpty]: Start isEmpty. Operand 2815 states and 3947 transitions. [2021-11-03 05:43:21,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-03 05:43:21,354 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:43:21,354 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] [2021-11-03 05:43:21,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-03 05:43:21,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:43:21,555 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:43:21,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:43:21,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1435725805, now seen corresponding path program 1 times [2021-11-03 05:43:21,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:43:21,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1601421894] [2021-11-03 05:43:21,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:43:21,557 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:43:21,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:43:21,558 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:43:21,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-03 05:43:24,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:43:24,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:43:24,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:43:24,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:24,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:24,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:24,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:24,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:25,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:25,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:25,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:25,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:25,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:25,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:25,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:25,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:43:25,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:43:25,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:43:25,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:43:25,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:43:25,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:43:25,389 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 05:43:25,389 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 05:43:26,949 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:43:26,949 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 05:43:27,179 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 05:43:27,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:43:27,778 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 05:43:27,778 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:43:27,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1601421894] [2021-11-03 05:43:27,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1601421894] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:43:27,778 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:43:27,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:43:27,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143976458] [2021-11-03 05:43:27,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:43:27,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:43:27,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:43:27,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:43:27,780 INFO L87 Difference]: Start difference. First operand 2815 states and 3947 transitions. Second operand has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:58,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:43:58,154 INFO L93 Difference]: Finished difference Result 6517 states and 9222 transitions. [2021-11-03 05:43:58,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:43:58,155 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 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 05:43:58,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:43:58,159 INFO L225 Difference]: With dead ends: 6517 [2021-11-03 05:43:58,159 INFO L226 Difference]: Without dead ends: 3723 [2021-11-03 05:43:58,161 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 05:43:58,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3723 states. [2021-11-03 05:43:58,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3723 to 2832. [2021-11-03 05:43:58,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2832 states, 2831 states have (on average 1.399858707170611) internal successors, (3963), 2831 states have internal predecessors, (3963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:58,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2832 states to 2832 states and 3963 transitions. [2021-11-03 05:43:58,465 INFO L78 Accepts]: Start accepts. Automaton has 2832 states and 3963 transitions. Word has length 188 [2021-11-03 05:43:58,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:43:58,466 INFO L470 AbstractCegarLoop]: Abstraction has 2832 states and 3963 transitions. [2021-11-03 05:43:58,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:58,466 INFO L276 IsEmpty]: Start isEmpty. Operand 2832 states and 3963 transitions. [2021-11-03 05:43:58,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-03 05:43:58,471 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:43:58,472 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] [2021-11-03 05:43:58,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-03 05:43:58,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:43:58,688 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:43:58,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:43:58,689 INFO L85 PathProgramCache]: Analyzing trace with hash -904229234, now seen corresponding path program 1 times [2021-11-03 05:43:58,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:43:58,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [403869317] [2021-11-03 05:43:58,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:43:58,690 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:43:58,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:43:58,691 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:43:58,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dba6c06f-9b8a-44f9-9035-de5fa054ab8f/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-03 05:44:01,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:44:01,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:44:01,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:44:02,146 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 05:44:02,152 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 05:44:02,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:44:02,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:44:02,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:44:02,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:02,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:44:02,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:44:02,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:44:02,165 INFO L190 IndexEqualityManager]: detected not equals via solver