./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec7_product34.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec7_product34.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5f7b52dfa978a30892cebb35c28a84cc12db47d20591a31b18d58060a0678455 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:09:21,901 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:09:21,903 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:09:21,935 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:09:21,936 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:09:21,937 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:09:21,939 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:09:21,941 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:09:21,944 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:09:21,945 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:09:21,946 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:09:21,947 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:09:21,948 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:09:21,949 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:09:21,951 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:09:21,952 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:09:21,953 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:09:21,955 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:09:21,957 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:09:21,959 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:09:21,961 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:09:21,963 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:09:21,964 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:09:21,965 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:09:21,969 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:09:21,970 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:09:21,970 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:09:21,971 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:09:21,972 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:09:21,973 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:09:21,973 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:09:21,974 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:09:21,975 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:09:21,976 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:09:21,977 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:09:21,977 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:09:21,978 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:09:21,979 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:09:21,979 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:09:21,980 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:09:21,981 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:09:21,982 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:09:22,009 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:09:22,009 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:09:22,010 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:09:22,010 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:09:22,011 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:09:22,011 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:09:22,011 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:09:22,011 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:09:22,012 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:09:22,012 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:09:22,012 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:09:22,012 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:09:22,013 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:09:22,013 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:09:22,013 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:09:22,014 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:09:22,014 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:09:22,014 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:09:22,014 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:09:22,015 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:09:22,015 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:09:22,015 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:09:22,015 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:09:22,016 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:09:22,016 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:09:22,016 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:09:22,016 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:09:22,017 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:09:22,017 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:09:22,017 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:09:22,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:09:22,018 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:09:22,018 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:09:22,018 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:09:22,018 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:09:22,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:09:22,019 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:09:22,019 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:09:22,019 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:09:22,020 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_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5f7b52dfa978a30892cebb35c28a84cc12db47d20591a31b18d58060a0678455 [2021-11-07 01:09:22,277 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:09:22,302 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:09:22,305 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:09:22,306 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:09:22,307 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:09:22,308 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec7_product34.cil.c [2021-11-07 01:09:22,377 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/data/d9a8e44c7/e0cd14350fe54dc7a866affc0af2c485/FLAG511532e88 [2021-11-07 01:09:22,972 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:09:22,976 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/sv-benchmarks/c/product-lines/email_spec7_product34.cil.c [2021-11-07 01:09:23,004 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/data/d9a8e44c7/e0cd14350fe54dc7a866affc0af2c485/FLAG511532e88 [2021-11-07 01:09:23,368 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/data/d9a8e44c7/e0cd14350fe54dc7a866affc0af2c485 [2021-11-07 01:09:23,370 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:09:23,372 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:09:23,377 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:09:23,377 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:09:23,381 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:09:23,382 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:09:23" (1/1) ... [2021-11-07 01:09:23,384 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71884e81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:23, skipping insertion in model container [2021-11-07 01:09:23,384 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:09:23" (1/1) ... [2021-11-07 01:09:23,391 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:09:23,473 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:09:23,780 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_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/sv-benchmarks/c/product-lines/email_spec7_product34.cil.c[10988,11001] [2021-11-07 01:09:23,992 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:09:24,010 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:09:24,011 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3a3ad740 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:24, skipping insertion in model container [2021-11-07 01:09:24,011 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:09:24,011 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:09:24,017 INFO L168 Benchmark]: Toolchain (without parser) took 643.94 ms. Allocated memory is still 119.5 MB. Free memory was 85.8 MB in the beginning and 78.8 MB in the end (delta: 7.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:09:24,018 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 119.5 MB. Free memory is still 72.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:09:24,018 INFO L168 Benchmark]: CACSL2BoogieTranslator took 634.25 ms. Allocated memory is still 119.5 MB. Free memory was 85.8 MB in the beginning and 78.8 MB in the end (delta: 7.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:09:24,020 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 119.5 MB. Free memory is still 72.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 634.25 ms. Allocated memory is still 119.5 MB. Free memory was 85.8 MB in the beginning and 78.8 MB in the end (delta: 7.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 585]: 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_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec7_product34.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5f7b52dfa978a30892cebb35c28a84cc12db47d20591a31b18d58060a0678455 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:09:26,074 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:09:26,077 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:09:26,140 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:09:26,141 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:09:26,146 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:09:26,147 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:09:26,151 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:09:26,154 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:09:26,164 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:09:26,166 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:09:26,167 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:09:26,168 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:09:26,170 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:09:26,172 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:09:26,174 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:09:26,175 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:09:26,175 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:09:26,177 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:09:26,179 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:09:26,181 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:09:26,185 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:09:26,187 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:09:26,188 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:09:26,191 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:09:26,191 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:09:26,192 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:09:26,193 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:09:26,193 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:09:26,194 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:09:26,195 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:09:26,195 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:09:26,196 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:09:26,197 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:09:26,198 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:09:26,199 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:09:26,199 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:09:26,200 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:09:26,205 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:09:26,207 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:09:26,207 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:09:26,208 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:09:26,255 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:09:26,255 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:09:26,256 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:09:26,257 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:09:26,257 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:09:26,257 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:09:26,257 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:09:26,257 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:09:26,258 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:09:26,259 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:09:26,260 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:09:26,260 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:09:26,260 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:09:26,261 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:09:26,261 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:09:26,261 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:09:26,261 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:09:26,261 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:09:26,262 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:09:26,262 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:09:26,262 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:09:26,262 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:09:26,262 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:09:26,263 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:09:26,263 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:09:26,263 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:09:26,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:09:26,263 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:09:26,264 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:09:26,264 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:09:26,264 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:09:26,264 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:09:26,264 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:09:26,265 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:09:26,265 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:09:26,265 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_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5f7b52dfa978a30892cebb35c28a84cc12db47d20591a31b18d58060a0678455 [2021-11-07 01:09:26,638 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:09:26,665 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:09:26,667 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:09:26,668 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:09:26,669 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:09:26,670 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec7_product34.cil.c [2021-11-07 01:09:26,739 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/data/49d372ddc/5e269ffd7977469b8ac1d10bbeec2cc1/FLAGb7aab604e [2021-11-07 01:09:27,340 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:09:27,341 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/sv-benchmarks/c/product-lines/email_spec7_product34.cil.c [2021-11-07 01:09:27,378 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/data/49d372ddc/5e269ffd7977469b8ac1d10bbeec2cc1/FLAGb7aab604e [2021-11-07 01:09:27,784 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/data/49d372ddc/5e269ffd7977469b8ac1d10bbeec2cc1 [2021-11-07 01:09:27,792 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:09:27,794 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:09:27,796 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:09:27,796 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:09:27,800 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:09:27,801 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:09:27" (1/1) ... [2021-11-07 01:09:27,802 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11f4edf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:27, skipping insertion in model container [2021-11-07 01:09:27,802 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:09:27" (1/1) ... [2021-11-07 01:09:27,809 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:09:27,889 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:09:28,296 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_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/sv-benchmarks/c/product-lines/email_spec7_product34.cil.c[10988,11001] [2021-11-07 01:09:28,610 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:09:28,633 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:09:28,657 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:09:28,688 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_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/sv-benchmarks/c/product-lines/email_spec7_product34.cil.c[10988,11001] [2021-11-07 01:09:28,798 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:09:28,807 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:09:28,843 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_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/sv-benchmarks/c/product-lines/email_spec7_product34.cil.c[10988,11001] [2021-11-07 01:09:28,892 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:09:28,934 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:09:28,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:28 WrapperNode [2021-11-07 01:09:28,934 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:09:28,936 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:09:28,936 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:09:28,936 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:09:28,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:28" (1/1) ... [2021-11-07 01:09:28,981 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:28" (1/1) ... [2021-11-07 01:09:29,166 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:09:29,167 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:09:29,167 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:09:29,167 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:09:29,176 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:28" (1/1) ... [2021-11-07 01:09:29,176 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:28" (1/1) ... [2021-11-07 01:09:29,195 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:28" (1/1) ... [2021-11-07 01:09:29,195 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:28" (1/1) ... [2021-11-07 01:09:29,263 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:28" (1/1) ... [2021-11-07 01:09:29,299 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:28" (1/1) ... [2021-11-07 01:09:29,309 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:28" (1/1) ... [2021-11-07 01:09:29,331 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:09:29,332 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:09:29,333 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:09:29,333 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:09:29,334 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:28" (1/1) ... [2021-11-07 01:09:29,378 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:09:29,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:09:29,410 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:09:29,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:09:29,458 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:09:29,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:09:29,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:09:29,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:09:29,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:09:35,797 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:09:35,798 INFO L299 CfgBuilder]: Removed 861 assume(true) statements. [2021-11-07 01:09:35,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:09:35 BoogieIcfgContainer [2021-11-07 01:09:35,803 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:09:35,804 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:09:35,805 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:09:35,808 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:09:35,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:09:27" (1/3) ... [2021-11-07 01:09:35,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ed47bab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:09:35, skipping insertion in model container [2021-11-07 01:09:35,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:28" (2/3) ... [2021-11-07 01:09:35,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ed47bab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:09:35, skipping insertion in model container [2021-11-07 01:09:35,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:09:35" (3/3) ... [2021-11-07 01:09:35,811 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec7_product34.cil.c [2021-11-07 01:09:35,817 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:09:35,817 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 01:09:35,869 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:09:35,875 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:09:35,876 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 01:09:35,919 INFO L276 IsEmpty]: Start isEmpty. Operand has 1254 states, 1247 states have (on average 1.719326383319968) internal successors, (2144), 1253 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:35,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 01:09:35,935 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:35,935 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:09:35,936 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:09:35,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:35,942 INFO L85 PathProgramCache]: Analyzing trace with hash -410760533, now seen corresponding path program 1 times [2021-11-07 01:09:35,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:35,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1883639956] [2021-11-07 01:09:35,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:35,959 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:35,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:35,966 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:35,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:09:36,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:36,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:09:36,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:36,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:36,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:36,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:36,839 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:36,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1883639956] [2021-11-07 01:09:36,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1883639956] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:36,840 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:36,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:09:36,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776793709] [2021-11-07 01:09:36,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:09:36,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:36,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:09:36,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:09:36,869 INFO L87 Difference]: Start difference. First operand has 1254 states, 1247 states have (on average 1.719326383319968) internal successors, (2144), 1253 states have internal predecessors, (2144), 0 states have call successors, (0), 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 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:36,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:36,971 INFO L93 Difference]: Finished difference Result 2223 states and 3765 transitions. [2021-11-07 01:09:36,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:09:36,973 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2021-11-07 01:09:36,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:37,001 INFO L225 Difference]: With dead ends: 2223 [2021-11-07 01:09:37,002 INFO L226 Difference]: Without dead ends: 1090 [2021-11-07 01:09:37,012 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:09:37,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2021-11-07 01:09:37,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 1090. [2021-11-07 01:09:37,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 1084 states have (on average 1.7223247232472325) internal successors, (1867), 1089 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:37,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 1867 transitions. [2021-11-07 01:09:37,133 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 1867 transitions. Word has length 55 [2021-11-07 01:09:37,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:37,133 INFO L470 AbstractCegarLoop]: Abstraction has 1090 states and 1867 transitions. [2021-11-07 01:09:37,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:37,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 1867 transitions. [2021-11-07 01:09:37,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 01:09:37,145 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:37,145 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:09:37,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:37,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:37,366 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:09:37,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:37,367 INFO L85 PathProgramCache]: Analyzing trace with hash -158254989, now seen corresponding path program 1 times [2021-11-07 01:09:37,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:37,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1077820933] [2021-11-07 01:09:37,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:37,369 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:37,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:37,370 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:37,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:09:37,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:37,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:09:37,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:38,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:38,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:38,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:38,281 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:38,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1077820933] [2021-11-07 01:09:38,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1077820933] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:38,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:38,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:09:38,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164130951] [2021-11-07 01:09:38,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:09:38,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:38,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:09:38,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:09:38,290 INFO L87 Difference]: Start difference. First operand 1090 states and 1867 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:38,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:38,446 INFO L93 Difference]: Finished difference Result 3240 states and 5553 transitions. [2021-11-07 01:09:38,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:09:38,447 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 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 56 [2021-11-07 01:09:38,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:38,461 INFO L225 Difference]: With dead ends: 3240 [2021-11-07 01:09:38,461 INFO L226 Difference]: Without dead ends: 2165 [2021-11-07 01:09:38,464 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:09:38,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2165 states. [2021-11-07 01:09:38,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2165 to 1089. [2021-11-07 01:09:38,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1089 states, 1083 states have (on average 1.719298245614035) internal successors, (1862), 1088 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:38,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1089 states to 1089 states and 1862 transitions. [2021-11-07 01:09:38,521 INFO L78 Accepts]: Start accepts. Automaton has 1089 states and 1862 transitions. Word has length 56 [2021-11-07 01:09:38,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:38,521 INFO L470 AbstractCegarLoop]: Abstraction has 1089 states and 1862 transitions. [2021-11-07 01:09:38,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:38,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1089 states and 1862 transitions. [2021-11-07 01:09:38,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 01:09:38,524 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:38,524 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:09:38,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:38,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:38,741 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:09:38,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:38,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1762727501, now seen corresponding path program 1 times [2021-11-07 01:09:38,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:38,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [667818046] [2021-11-07 01:09:38,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:38,747 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:38,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:38,748 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:38,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:09:39,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:39,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:09:39,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:39,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:39,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:39,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:39,554 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:39,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [667818046] [2021-11-07 01:09:39,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [667818046] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:39,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:39,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:09:39,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559386654] [2021-11-07 01:09:39,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:09:39,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:39,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:09:39,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:09:39,557 INFO L87 Difference]: Start difference. First operand 1089 states and 1862 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:39,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:39,947 INFO L93 Difference]: Finished difference Result 4273 states and 7310 transitions. [2021-11-07 01:09:39,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:09:39,948 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 01:09:39,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:39,968 INFO L225 Difference]: With dead ends: 4273 [2021-11-07 01:09:39,968 INFO L226 Difference]: Without dead ends: 3202 [2021-11-07 01:09:39,970 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:09:39,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3202 states. [2021-11-07 01:09:40,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3202 to 1088. [2021-11-07 01:09:40,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1088 states, 1082 states have (on average 1.7171903881700554) internal successors, (1858), 1087 states have internal predecessors, (1858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:40,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 1858 transitions. [2021-11-07 01:09:40,053 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 1858 transitions. Word has length 58 [2021-11-07 01:09:40,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:40,053 INFO L470 AbstractCegarLoop]: Abstraction has 1088 states and 1858 transitions. [2021-11-07 01:09:40,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:40,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 1858 transitions. [2021-11-07 01:09:40,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 01:09:40,055 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:40,055 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:09:40,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:40,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:40,270 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:09:40,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:40,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1760741210, now seen corresponding path program 1 times [2021-11-07 01:09:40,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:40,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [765326520] [2021-11-07 01:09:40,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:40,272 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:40,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:40,274 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:40,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:09:40,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:40,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:09:40,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:40,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:40,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:41,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:41,061 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:41,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [765326520] [2021-11-07 01:09:41,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [765326520] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:41,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:41,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:09:41,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671565411] [2021-11-07 01:09:41,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:09:41,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:41,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:09:41,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:09:41,065 INFO L87 Difference]: Start difference. First operand 1088 states and 1858 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:41,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:41,196 INFO L93 Difference]: Finished difference Result 2173 states and 3713 transitions. [2021-11-07 01:09:41,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:09:41,197 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-07 01:09:41,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:41,204 INFO L225 Difference]: With dead ends: 2173 [2021-11-07 01:09:41,204 INFO L226 Difference]: Without dead ends: 1093 [2021-11-07 01:09:41,206 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:09:41,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2021-11-07 01:09:41,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 1088. [2021-11-07 01:09:41,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1088 states, 1082 states have (on average 1.7144177449168208) internal successors, (1855), 1087 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:41,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 1855 transitions. [2021-11-07 01:09:41,276 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 1855 transitions. Word has length 59 [2021-11-07 01:09:41,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:41,277 INFO L470 AbstractCegarLoop]: Abstraction has 1088 states and 1855 transitions. [2021-11-07 01:09:41,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:41,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 1855 transitions. [2021-11-07 01:09:41,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:09:41,279 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:41,279 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:09:41,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:41,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:41,493 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:09:41,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:41,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1065417115, now seen corresponding path program 1 times [2021-11-07 01:09:41,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:41,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [750598368] [2021-11-07 01:09:41,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:41,495 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:41,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:41,496 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:41,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:09:41,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:41,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:09:41,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:42,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:42,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:42,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:42,340 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:42,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [750598368] [2021-11-07 01:09:42,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [750598368] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:42,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:42,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:09:42,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731266855] [2021-11-07 01:09:42,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:09:42,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:42,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:09:42,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:09:42,346 INFO L87 Difference]: Start difference. First operand 1088 states and 1855 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:42,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:42,815 INFO L93 Difference]: Finished difference Result 4260 states and 7286 transitions. [2021-11-07 01:09:42,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:09:42,816 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 01:09:42,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:42,834 INFO L225 Difference]: With dead ends: 4260 [2021-11-07 01:09:42,835 INFO L226 Difference]: Without dead ends: 3198 [2021-11-07 01:09:42,837 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:09:42,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3198 states. [2021-11-07 01:09:42,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3198 to 1088. [2021-11-07 01:09:42,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1088 states, 1082 states have (on average 1.7116451016635859) internal successors, (1852), 1087 states have internal predecessors, (1852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:42,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 1852 transitions. [2021-11-07 01:09:42,937 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 1852 transitions. Word has length 60 [2021-11-07 01:09:42,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:42,937 INFO L470 AbstractCegarLoop]: Abstraction has 1088 states and 1852 transitions. [2021-11-07 01:09:42,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:42,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 1852 transitions. [2021-11-07 01:09:42,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 01:09:42,939 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:42,940 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:09:42,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:43,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:43,154 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:09:43,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:43,155 INFO L85 PathProgramCache]: Analyzing trace with hash 2020144394, now seen corresponding path program 1 times [2021-11-07 01:09:43,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:43,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1457425279] [2021-11-07 01:09:43,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:43,156 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:43,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:43,157 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:43,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:09:43,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:43,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:09:43,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:43,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:43,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:43,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:43,938 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:43,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1457425279] [2021-11-07 01:09:43,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1457425279] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:43,938 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:43,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:09:43,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544081617] [2021-11-07 01:09:43,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:09:43,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:43,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:09:43,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:09:43,940 INFO L87 Difference]: Start difference. First operand 1088 states and 1852 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:44,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:44,158 INFO L93 Difference]: Finished difference Result 2955 states and 5021 transitions. [2021-11-07 01:09:44,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:09:44,158 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-07 01:09:44,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:44,171 INFO L225 Difference]: With dead ends: 2955 [2021-11-07 01:09:44,171 INFO L226 Difference]: Without dead ends: 2150 [2021-11-07 01:09:44,173 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:09:44,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2150 states. [2021-11-07 01:09:44,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2150 to 1345. [2021-11-07 01:09:44,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1339 states have (on average 1.7363704256908141) internal successors, (2325), 1344 states have internal predecessors, (2325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:44,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 2325 transitions. [2021-11-07 01:09:44,287 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 2325 transitions. Word has length 62 [2021-11-07 01:09:44,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:44,287 INFO L470 AbstractCegarLoop]: Abstraction has 1345 states and 2325 transitions. [2021-11-07 01:09:44,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:44,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 2325 transitions. [2021-11-07 01:09:44,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:09:44,290 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:44,290 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:09:44,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:44,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:44,505 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:09:44,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:44,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1926950439, now seen corresponding path program 1 times [2021-11-07 01:09:44,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:44,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [428519025] [2021-11-07 01:09:44,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:44,507 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:44,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:44,508 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:44,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:09:44,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:45,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:09:45,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:45,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:45,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:45,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:45,383 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:45,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [428519025] [2021-11-07 01:09:45,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [428519025] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:45,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:45,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:09:45,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347095884] [2021-11-07 01:09:45,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:09:45,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:45,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:09:45,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:09:45,386 INFO L87 Difference]: Start difference. First operand 1345 states and 2325 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:45,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:45,578 INFO L93 Difference]: Finished difference Result 3616 states and 6241 transitions. [2021-11-07 01:09:45,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:09:45,579 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 01:09:45,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:45,593 INFO L225 Difference]: With dead ends: 3616 [2021-11-07 01:09:45,593 INFO L226 Difference]: Without dead ends: 2355 [2021-11-07 01:09:45,597 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:09:45,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2355 states. [2021-11-07 01:09:45,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2355 to 1550. [2021-11-07 01:09:45,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1550 states, 1544 states have (on average 1.7493523316062176) internal successors, (2701), 1549 states have internal predecessors, (2701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:45,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 2701 transitions. [2021-11-07 01:09:45,761 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 2701 transitions. Word has length 74 [2021-11-07 01:09:45,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:45,763 INFO L470 AbstractCegarLoop]: Abstraction has 1550 states and 2701 transitions. [2021-11-07 01:09:45,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:45,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 2701 transitions. [2021-11-07 01:09:45,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:09:45,766 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:45,767 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:09:45,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:45,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:45,986 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:09:45,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:45,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1246831770, now seen corresponding path program 1 times [2021-11-07 01:09:45,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:45,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [188683385] [2021-11-07 01:09:45,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:45,988 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:45,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:45,991 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:45,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:09:46,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:46,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:09:46,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:46,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:46,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:46,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:46,869 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:46,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [188683385] [2021-11-07 01:09:46,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [188683385] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:46,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:46,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:09:46,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075674504] [2021-11-07 01:09:46,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:09:46,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:46,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:09:46,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:09:46,872 INFO L87 Difference]: Start difference. First operand 1550 states and 2701 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:47,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:47,145 INFO L93 Difference]: Finished difference Result 4275 states and 7455 transitions. [2021-11-07 01:09:47,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:09:47,146 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 01:09:47,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:47,164 INFO L225 Difference]: With dead ends: 4275 [2021-11-07 01:09:47,164 INFO L226 Difference]: Without dead ends: 2813 [2021-11-07 01:09:47,168 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:09:47,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2813 states. [2021-11-07 01:09:47,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2813 to 2008. [2021-11-07 01:09:47,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2008 states, 2002 states have (on average 1.7697302697302697) internal successors, (3543), 2007 states have internal predecessors, (3543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:47,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 3543 transitions. [2021-11-07 01:09:47,340 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 3543 transitions. Word has length 75 [2021-11-07 01:09:47,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:47,340 INFO L470 AbstractCegarLoop]: Abstraction has 2008 states and 3543 transitions. [2021-11-07 01:09:47,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:47,340 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 3543 transitions. [2021-11-07 01:09:47,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 01:09:47,349 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:47,349 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:09:47,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:47,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:47,565 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:09:47,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:47,566 INFO L85 PathProgramCache]: Analyzing trace with hash -49880150, now seen corresponding path program 1 times [2021-11-07 01:09:47,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:47,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [778319052] [2021-11-07 01:09:47,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:47,567 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:47,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:47,568 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:47,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:09:48,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:48,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:09:48,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:48,363 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:48,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:48,526 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:48,526 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:48,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [778319052] [2021-11-07 01:09:48,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [778319052] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:48,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:48,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:09:48,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240026637] [2021-11-07 01:09:48,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:09:48,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:48,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:09:48,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:09:48,528 INFO L87 Difference]: Start difference. First operand 2008 states and 3543 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:48,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:48,745 INFO L93 Difference]: Finished difference Result 4532 states and 7925 transitions. [2021-11-07 01:09:48,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:09:48,746 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 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 76 [2021-11-07 01:09:48,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:48,763 INFO L225 Difference]: With dead ends: 4532 [2021-11-07 01:09:48,763 INFO L226 Difference]: Without dead ends: 2813 [2021-11-07 01:09:48,766 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:09:48,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2813 states. [2021-11-07 01:09:48,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2813 to 2008. [2021-11-07 01:09:48,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2008 states, 2002 states have (on average 1.7687312687312686) internal successors, (3541), 2007 states have internal predecessors, (3541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:48,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 3541 transitions. [2021-11-07 01:09:48,936 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 3541 transitions. Word has length 76 [2021-11-07 01:09:48,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:48,937 INFO L470 AbstractCegarLoop]: Abstraction has 2008 states and 3541 transitions. [2021-11-07 01:09:48,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:48,937 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 3541 transitions. [2021-11-07 01:09:48,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 01:09:48,941 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:48,941 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:09:48,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:49,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:49,157 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:09:49,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:49,158 INFO L85 PathProgramCache]: Analyzing trace with hash 954506475, now seen corresponding path program 1 times [2021-11-07 01:09:49,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:49,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1254833365] [2021-11-07 01:09:49,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:49,158 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:49,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:49,159 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:49,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:09:49,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:49,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:09:49,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:49,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:49,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:50,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:50,036 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:50,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1254833365] [2021-11-07 01:09:50,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1254833365] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:50,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:50,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:09:50,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253257320] [2021-11-07 01:09:50,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:09:50,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:50,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:09:50,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:09:50,038 INFO L87 Difference]: Start difference. First operand 2008 states and 3541 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:50,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:50,298 INFO L93 Difference]: Finished difference Result 5621 states and 9930 transitions. [2021-11-07 01:09:50,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:09:50,298 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 01:09:50,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:50,334 INFO L225 Difference]: With dead ends: 5621 [2021-11-07 01:09:50,337 INFO L226 Difference]: Without dead ends: 3709 [2021-11-07 01:09:50,340 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:09:50,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3709 states. [2021-11-07 01:09:50,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3709 to 2904. [2021-11-07 01:09:50,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2904 states, 2898 states have (on average 1.790200138026225) internal successors, (5188), 2903 states have internal predecessors, (5188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:50,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2904 states to 2904 states and 5188 transitions. [2021-11-07 01:09:50,579 INFO L78 Accepts]: Start accepts. Automaton has 2904 states and 5188 transitions. Word has length 76 [2021-11-07 01:09:50,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:50,579 INFO L470 AbstractCegarLoop]: Abstraction has 2904 states and 5188 transitions. [2021-11-07 01:09:50,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:50,580 INFO L276 IsEmpty]: Start isEmpty. Operand 2904 states and 5188 transitions. [2021-11-07 01:09:50,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:09:50,586 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:50,586 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:09:50,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:50,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:50,802 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:09:50,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:50,802 INFO L85 PathProgramCache]: Analyzing trace with hash 183761048, now seen corresponding path program 1 times [2021-11-07 01:09:50,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:50,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1576642472] [2021-11-07 01:09:50,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:50,803 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:50,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:50,804 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:50,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:09:51,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:51,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:09:51,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:51,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:51,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:51,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:51,799 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:51,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1576642472] [2021-11-07 01:09:51,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1576642472] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:51,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:51,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:09:51,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039684503] [2021-11-07 01:09:51,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:09:51,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:51,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:09:51,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:09:51,801 INFO L87 Difference]: Start difference. First operand 2904 states and 5188 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:52,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:52,175 INFO L93 Difference]: Finished difference Result 8045 states and 14390 transitions. [2021-11-07 01:09:52,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:09:52,176 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-07 01:09:52,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:52,193 INFO L225 Difference]: With dead ends: 8045 [2021-11-07 01:09:52,193 INFO L226 Difference]: Without dead ends: 5271 [2021-11-07 01:09:52,198 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:09:52,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5271 states. [2021-11-07 01:09:52,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5271 to 4466. [2021-11-07 01:09:52,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4466 states, 4460 states have (on average 1.8065022421524664) internal successors, (8057), 4465 states have internal predecessors, (8057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:52,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4466 states to 4466 states and 8057 transitions. [2021-11-07 01:09:52,533 INFO L78 Accepts]: Start accepts. Automaton has 4466 states and 8057 transitions. Word has length 77 [2021-11-07 01:09:52,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:52,534 INFO L470 AbstractCegarLoop]: Abstraction has 4466 states and 8057 transitions. [2021-11-07 01:09:52,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:52,535 INFO L276 IsEmpty]: Start isEmpty. Operand 4466 states and 8057 transitions. [2021-11-07 01:09:52,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 01:09:52,545 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:52,547 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:09:52,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:52,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:52,777 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:09:52,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:52,778 INFO L85 PathProgramCache]: Analyzing trace with hash -66316358, now seen corresponding path program 1 times [2021-11-07 01:09:52,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:52,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1983308157] [2021-11-07 01:09:52,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:52,779 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:52,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:52,781 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:52,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:09:53,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:53,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:09:53,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:53,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:53,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:53,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:53,854 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:53,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1983308157] [2021-11-07 01:09:53,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1983308157] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:53,854 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:53,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:09:53,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543255746] [2021-11-07 01:09:53,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:09:53,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:53,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:09:53,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:09:53,856 INFO L87 Difference]: Start difference. First operand 4466 states and 8057 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:54,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:54,288 INFO L93 Difference]: Finished difference Result 12447 states and 22480 transitions. [2021-11-07 01:09:54,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:09:54,289 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 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 78 [2021-11-07 01:09:54,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:54,313 INFO L225 Difference]: With dead ends: 12447 [2021-11-07 01:09:54,313 INFO L226 Difference]: Without dead ends: 8145 [2021-11-07 01:09:54,320 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:09:54,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8145 states. [2021-11-07 01:09:54,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8145 to 7340. [2021-11-07 01:09:54,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7340 states, 7334 states have (on average 1.8175620398145622) internal successors, (13330), 7339 states have internal predecessors, (13330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:54,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7340 states to 7340 states and 13330 transitions. [2021-11-07 01:09:54,915 INFO L78 Accepts]: Start accepts. Automaton has 7340 states and 13330 transitions. Word has length 78 [2021-11-07 01:09:54,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:54,915 INFO L470 AbstractCegarLoop]: Abstraction has 7340 states and 13330 transitions. [2021-11-07 01:09:54,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:54,916 INFO L276 IsEmpty]: Start isEmpty. Operand 7340 states and 13330 transitions. [2021-11-07 01:09:54,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:09:54,925 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:54,926 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:09:54,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:55,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:55,141 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:09:55,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:55,142 INFO L85 PathProgramCache]: Analyzing trace with hash -206181930, now seen corresponding path program 1 times [2021-11-07 01:09:55,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:55,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1946815286] [2021-11-07 01:09:55,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:55,143 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:55,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:55,144 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:55,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:09:55,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:55,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:09:55,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:56,012 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:09:56,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:56,241 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:09:56,241 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:56,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1946815286] [2021-11-07 01:09:56,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1946815286] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:56,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:56,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:09:56,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472929623] [2021-11-07 01:09:56,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:09:56,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:56,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:09:56,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:09:56,243 INFO L87 Difference]: Start difference. First operand 7340 states and 13330 transitions. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:59,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:59,522 INFO L93 Difference]: Finished difference Result 27871 states and 50655 transitions. [2021-11-07 01:09:59,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:09:59,523 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 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 79 [2021-11-07 01:09:59,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:59,588 INFO L225 Difference]: With dead ends: 27871 [2021-11-07 01:09:59,588 INFO L226 Difference]: Without dead ends: 20818 [2021-11-07 01:09:59,601 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:09:59,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20818 states. [2021-11-07 01:10:00,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20818 to 7290. [2021-11-07 01:10:00,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7290 states, 7284 states have (on average 1.8025809994508513) internal successors, (13130), 7289 states have internal predecessors, (13130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:00,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7290 states to 7290 states and 13130 transitions. [2021-11-07 01:10:00,258 INFO L78 Accepts]: Start accepts. Automaton has 7290 states and 13130 transitions. Word has length 79 [2021-11-07 01:10:00,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:00,258 INFO L470 AbstractCegarLoop]: Abstraction has 7290 states and 13130 transitions. [2021-11-07 01:10:00,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:00,259 INFO L276 IsEmpty]: Start isEmpty. Operand 7290 states and 13130 transitions. [2021-11-07 01:10:00,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:10:00,274 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:00,274 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:00,292 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-07 01:10:00,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:00,488 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:10:00,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:00,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1019130183, now seen corresponding path program 1 times [2021-11-07 01:10:00,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:00,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1673640697] [2021-11-07 01:10:00,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:00,489 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:00,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:00,490 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:00,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:10:01,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:01,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:10:01,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:01,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:01,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:01,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:01,508 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:01,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1673640697] [2021-11-07 01:10:01,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1673640697] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:01,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:01,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:10:01,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877189382] [2021-11-07 01:10:01,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:10:01,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:01,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:10:01,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:01,510 INFO L87 Difference]: Start difference. First operand 7290 states and 13130 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:02,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:02,088 INFO L93 Difference]: Finished difference Result 21248 states and 38322 transitions. [2021-11-07 01:10:02,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:10:02,089 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-07 01:10:02,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:02,128 INFO L225 Difference]: With dead ends: 21248 [2021-11-07 01:10:02,129 INFO L226 Difference]: Without dead ends: 14129 [2021-11-07 01:10:02,138 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:02,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14129 states. [2021-11-07 01:10:02,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14129 to 13324. [2021-11-07 01:10:02,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13324 states, 13318 states have (on average 1.8089052410271813) internal successors, (24091), 13323 states have internal predecessors, (24091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:02,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13324 states to 13324 states and 24091 transitions. [2021-11-07 01:10:02,976 INFO L78 Accepts]: Start accepts. Automaton has 13324 states and 24091 transitions. Word has length 79 [2021-11-07 01:10:02,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:02,977 INFO L470 AbstractCegarLoop]: Abstraction has 13324 states and 24091 transitions. [2021-11-07 01:10:02,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:02,977 INFO L276 IsEmpty]: Start isEmpty. Operand 13324 states and 24091 transitions. [2021-11-07 01:10:02,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 01:10:02,990 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:02,991 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:03,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:03,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:03,204 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:10:03,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:03,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1805864325, now seen corresponding path program 1 times [2021-11-07 01:10:03,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:03,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [200563211] [2021-11-07 01:10:03,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:03,206 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:03,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:03,207 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:03,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:10:03,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:03,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:10:03,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:04,154 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:04,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:04,441 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:04,441 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:04,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [200563211] [2021-11-07 01:10:04,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [200563211] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:10:04,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1264210446] [2021-11-07 01:10:04,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:04,442 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:10:04,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:10:04,450 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:10:04,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 01:10:05,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:05,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:10:05,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:05,682 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:10:05,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:05,994 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:10:05,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1264210446] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:05,994 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:10:05,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 16 [2021-11-07 01:10:05,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331380747] [2021-11-07 01:10:05,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:10:05,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:05,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:10:05,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:10:05,996 INFO L87 Difference]: Start difference. First operand 13324 states and 24091 transitions. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:13,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:13,774 INFO L93 Difference]: Finished difference Result 90396 states and 162311 transitions. [2021-11-07 01:10:13,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 01:10:13,774 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 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 80 [2021-11-07 01:10:13,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:13,958 INFO L225 Difference]: With dead ends: 90396 [2021-11-07 01:10:13,959 INFO L226 Difference]: Without dead ends: 89609 [2021-11-07 01:10:13,981 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=242, Invalid=1018, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 01:10:14,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89609 states. [2021-11-07 01:10:16,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89609 to 26319. [2021-11-07 01:10:16,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26319 states, 26313 states have (on average 1.8103218941207768) internal successors, (47635), 26318 states have internal predecessors, (47635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:16,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26319 states to 26319 states and 47635 transitions. [2021-11-07 01:10:16,277 INFO L78 Accepts]: Start accepts. Automaton has 26319 states and 47635 transitions. Word has length 80 [2021-11-07 01:10:16,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:16,278 INFO L470 AbstractCegarLoop]: Abstraction has 26319 states and 47635 transitions. [2021-11-07 01:10:16,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:16,278 INFO L276 IsEmpty]: Start isEmpty. Operand 26319 states and 47635 transitions. [2021-11-07 01:10:16,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 01:10:16,301 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:16,302 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:16,307 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-11-07 01:10:16,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-07 01:10:16,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:16,707 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:10:16,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:16,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1998886891, now seen corresponding path program 1 times [2021-11-07 01:10:16,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:16,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2045365803] [2021-11-07 01:10:16,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:16,708 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:16,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:16,709 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:16,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:10:17,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:17,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:10:17,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:17,662 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:17,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:17,876 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:17,877 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:17,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2045365803] [2021-11-07 01:10:17,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2045365803] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:10:17,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [764064541] [2021-11-07 01:10:17,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:17,877 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:10:17,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:10:17,878 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:10:17,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 01:10:18,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:18,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:10:18,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:19,226 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:10:19,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:19,441 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:10:19,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [764064541] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:19,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:10:19,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-07 01:10:19,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346661952] [2021-11-07 01:10:19,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:10:19,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:19,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:10:19,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:10:19,444 INFO L87 Difference]: Start difference. First operand 26319 states and 47635 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:23,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:23,017 INFO L93 Difference]: Finished difference Result 28636 states and 51492 transitions. [2021-11-07 01:10:23,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:10:23,017 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-07 01:10:23,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:23,074 INFO L225 Difference]: With dead ends: 28636 [2021-11-07 01:10:23,074 INFO L226 Difference]: Without dead ends: 27363 [2021-11-07 01:10:23,082 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:10:23,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27363 states. [2021-11-07 01:10:24,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27363 to 26313. [2021-11-07 01:10:24,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26313 states, 26307 states have (on average 1.8102406203672026) internal successors, (47622), 26312 states have internal predecessors, (47622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:24,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26313 states to 26313 states and 47622 transitions. [2021-11-07 01:10:24,452 INFO L78 Accepts]: Start accepts. Automaton has 26313 states and 47622 transitions. Word has length 81 [2021-11-07 01:10:24,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:24,453 INFO L470 AbstractCegarLoop]: Abstraction has 26313 states and 47622 transitions. [2021-11-07 01:10:24,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:24,453 INFO L276 IsEmpty]: Start isEmpty. Operand 26313 states and 47622 transitions. [2021-11-07 01:10:24,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 01:10:24,474 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:24,474 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:24,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:24,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:24,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:10:24,892 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:10:24,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:24,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1358752936, now seen corresponding path program 1 times [2021-11-07 01:10:24,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:24,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [166858441] [2021-11-07 01:10:24,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:24,893 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:24,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:24,893 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:24,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:10:25,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:25,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:10:25,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:25,852 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:10:25,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:26,045 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:10:26,045 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:26,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [166858441] [2021-11-07 01:10:26,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [166858441] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:26,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:26,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:10:26,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211315563] [2021-11-07 01:10:26,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:10:26,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:26,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:10:26,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:10:26,047 INFO L87 Difference]: Start difference. First operand 26313 states and 47622 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:27,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:27,607 INFO L93 Difference]: Finished difference Result 51897 states and 94122 transitions. [2021-11-07 01:10:27,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:10:27,608 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-07 01:10:27,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:27,648 INFO L225 Difference]: With dead ends: 51897 [2021-11-07 01:10:27,648 INFO L226 Difference]: Without dead ends: 25874 [2021-11-07 01:10:27,675 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:10:27,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25874 states. [2021-11-07 01:10:28,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25874 to 13322. [2021-11-07 01:10:28,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13322 states, 13316 states have (on average 1.8085010513667767) internal successors, (24082), 13321 states have internal predecessors, (24082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:28,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13322 states to 13322 states and 24082 transitions. [2021-11-07 01:10:28,635 INFO L78 Accepts]: Start accepts. Automaton has 13322 states and 24082 transitions. Word has length 81 [2021-11-07 01:10:28,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:28,635 INFO L470 AbstractCegarLoop]: Abstraction has 13322 states and 24082 transitions. [2021-11-07 01:10:28,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:28,635 INFO L276 IsEmpty]: Start isEmpty. Operand 13322 states and 24082 transitions. [2021-11-07 01:10:28,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 01:10:28,645 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:28,645 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:28,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:28,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:28,848 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:10:28,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:28,849 INFO L85 PathProgramCache]: Analyzing trace with hash -669954211, now seen corresponding path program 1 times [2021-11-07 01:10:28,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:28,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1967831602] [2021-11-07 01:10:28,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:28,850 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:28,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:28,851 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:28,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 01:10:29,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:29,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:10:29,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:29,934 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:29,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:30,162 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:30,162 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:30,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1967831602] [2021-11-07 01:10:30,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1967831602] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:10:30,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [508726406] [2021-11-07 01:10:30,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:30,163 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:10:30,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:10:30,163 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:10:30,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-07 01:10:31,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:31,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:10:31,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:32,151 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:10:32,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:32,659 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:10:32,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [508726406] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:32,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:10:32,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 01:10:32,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192783658] [2021-11-07 01:10:32,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:10:32,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:32,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:10:32,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:10:32,662 INFO L87 Difference]: Start difference. First operand 13322 states and 24082 transitions. Second operand has 16 states, 16 states have (on average 8.4375) internal successors, (135), 15 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) [2021-11-07 01:10:52,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:52,113 INFO L93 Difference]: Finished difference Result 36825 states and 64792 transitions. [2021-11-07 01:10:52,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-07 01:10:52,115 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.4375) internal successors, (135), 15 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 83 [2021-11-07 01:10:52,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:52,162 INFO L225 Difference]: With dead ends: 36825 [2021-11-07 01:10:52,162 INFO L226 Difference]: Without dead ends: 36086 [2021-11-07 01:10:52,169 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1102 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1073, Invalid=3483, Unknown=0, NotChecked=0, Total=4556 [2021-11-07 01:10:52,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36086 states. [2021-11-07 01:10:53,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36086 to 26941. [2021-11-07 01:10:53,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26941 states, 26935 states have (on average 1.806942639688138) internal successors, (48670), 26940 states have internal predecessors, (48670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:53,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26941 states to 26941 states and 48670 transitions. [2021-11-07 01:10:53,827 INFO L78 Accepts]: Start accepts. Automaton has 26941 states and 48670 transitions. Word has length 83 [2021-11-07 01:10:53,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:53,827 INFO L470 AbstractCegarLoop]: Abstraction has 26941 states and 48670 transitions. [2021-11-07 01:10:53,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.4375) internal successors, (135), 15 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) [2021-11-07 01:10:53,828 INFO L276 IsEmpty]: Start isEmpty. Operand 26941 states and 48670 transitions. [2021-11-07 01:10:53,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:10:53,850 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:53,850 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:53,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:54,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:54,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:10:54,267 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:10:54,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:54,268 INFO L85 PathProgramCache]: Analyzing trace with hash 902819882, now seen corresponding path program 1 times [2021-11-07 01:10:54,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:54,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1586743879] [2021-11-07 01:10:54,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:54,269 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:54,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:54,270 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:54,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 01:10:55,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:55,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:10:55,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:55,393 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:55,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:55,657 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:55,658 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:55,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1586743879] [2021-11-07 01:10:55,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1586743879] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:10:55,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [236405636] [2021-11-07 01:10:55,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:55,658 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:10:55,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:10:55,664 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:10:55,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-07 01:10:56,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:56,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 01:10:56,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:57,292 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:10:57,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:57,582 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:10:57,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [236405636] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:57,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:10:57,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 14 [2021-11-07 01:10:57,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752205005] [2021-11-07 01:10:57,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:10:57,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:57,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:10:57,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:10:57,586 INFO L87 Difference]: Start difference. First operand 26941 states and 48670 transitions. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:01,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:01,883 INFO L93 Difference]: Finished difference Result 29998 states and 53719 transitions. [2021-11-07 01:11:01,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:11:01,883 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-07 01:11:01,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:01,927 INFO L225 Difference]: With dead ends: 29998 [2021-11-07 01:11:01,927 INFO L226 Difference]: Without dead ends: 28044 [2021-11-07 01:11:01,933 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:11:01,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28044 states. [2021-11-07 01:11:03,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28044 to 26887. [2021-11-07 01:11:03,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26887 states, 26881 states have (on average 1.8061084037052193) internal successors, (48550), 26886 states have internal predecessors, (48550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:03,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26887 states to 26887 states and 48550 transitions. [2021-11-07 01:11:03,595 INFO L78 Accepts]: Start accepts. Automaton has 26887 states and 48550 transitions. Word has length 84 [2021-11-07 01:11:03,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:03,595 INFO L470 AbstractCegarLoop]: Abstraction has 26887 states and 48550 transitions. [2021-11-07 01:11:03,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:03,595 INFO L276 IsEmpty]: Start isEmpty. Operand 26887 states and 48550 transitions. [2021-11-07 01:11:03,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:11:03,610 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:03,610 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:03,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:03,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:04,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:11:04,011 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:11:04,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:04,011 INFO L85 PathProgramCache]: Analyzing trace with hash 250060546, now seen corresponding path program 1 times [2021-11-07 01:11:04,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:04,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [940667199] [2021-11-07 01:11:04,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:04,012 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:04,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:04,013 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:04,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 01:11:05,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:05,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:11:05,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:05,261 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:05,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:05,535 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:05,535 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:05,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [940667199] [2021-11-07 01:11:05,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [940667199] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:11:05,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [439580293] [2021-11-07 01:11:05,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:05,536 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:11:05,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:11:05,537 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:11:05,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-07 01:11:06,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:06,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:11:06,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:07,694 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:11:07,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:08,155 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:11:08,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [439580293] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:08,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:11:08,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 01:11:08,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906394511] [2021-11-07 01:11:08,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:11:08,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:08,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:11:08,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:11:08,157 INFO L87 Difference]: Start difference. First operand 26887 states and 48550 transitions. Second operand has 16 states, 16 states have (on average 8.5625) internal successors, (137), 15 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:40,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:40,987 INFO L93 Difference]: Finished difference Result 71894 states and 126735 transitions. [2021-11-07 01:11:40,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-07 01:11:40,987 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.5625) internal successors, (137), 15 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-07 01:11:40,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:41,106 INFO L225 Difference]: With dead ends: 71894 [2021-11-07 01:11:41,106 INFO L226 Difference]: Without dead ends: 70264 [2021-11-07 01:11:41,119 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1073, Invalid=3483, Unknown=0, NotChecked=0, Total=4556 [2021-11-07 01:11:41,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70264 states. [2021-11-07 01:11:44,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70264 to 53979. [2021-11-07 01:11:44,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53979 states, 53973 states have (on average 1.805217423526578) internal successors, (97433), 53978 states have internal predecessors, (97433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:45,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53979 states to 53979 states and 97433 transitions. [2021-11-07 01:11:45,246 INFO L78 Accepts]: Start accepts. Automaton has 53979 states and 97433 transitions. Word has length 84 [2021-11-07 01:11:45,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:45,247 INFO L470 AbstractCegarLoop]: Abstraction has 53979 states and 97433 transitions. [2021-11-07 01:11:45,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.5625) internal successors, (137), 15 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:45,247 INFO L276 IsEmpty]: Start isEmpty. Operand 53979 states and 97433 transitions. [2021-11-07 01:11:45,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:11:45,269 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:45,270 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:45,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:45,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:45,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:11:45,671 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:11:45,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:45,671 INFO L85 PathProgramCache]: Analyzing trace with hash -567587904, now seen corresponding path program 1 times [2021-11-07 01:11:45,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:45,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [657171393] [2021-11-07 01:11:45,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:45,672 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:45,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:45,673 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:45,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-07 01:11:46,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:46,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:11:46,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:47,088 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:47,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:47,398 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:47,398 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:47,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [657171393] [2021-11-07 01:11:47,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [657171393] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:11:47,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1089409744] [2021-11-07 01:11:47,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:47,399 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:11:47,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:11:47,404 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:11:47,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-07 01:11:49,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:49,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 01:11:49,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:49,509 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:11:49,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:50,038 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:11:50,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1089409744] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:50,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:11:50,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 20 [2021-11-07 01:11:50,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147767145] [2021-11-07 01:11:50,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 01:11:50,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:50,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 01:11:50,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:11:50,040 INFO L87 Difference]: Start difference. First operand 53979 states and 97433 transitions. Second operand has 14 states, 14 states have (on average 9.928571428571429) internal successors, (139), 14 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) [2021-11-07 01:12:12,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:12,005 INFO L93 Difference]: Finished difference Result 102608 states and 177675 transitions. [2021-11-07 01:12:12,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-07 01:12:12,006 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 9.928571428571429) internal successors, (139), 14 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 84 [2021-11-07 01:12:12,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:12,190 INFO L225 Difference]: With dead ends: 102608 [2021-11-07 01:12:12,190 INFO L226 Difference]: Without dead ends: 98654 [2021-11-07 01:12:12,213 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=827, Invalid=2713, Unknown=0, NotChecked=0, Total=3540 [2021-11-07 01:12:12,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98654 states. [2021-11-07 01:12:17,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98654 to 58013. [2021-11-07 01:12:17,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58013 states, 58007 states have (on average 1.7936973123933317) internal successors, (104047), 58012 states have internal predecessors, (104047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:17,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58013 states to 58013 states and 104047 transitions. [2021-11-07 01:12:17,804 INFO L78 Accepts]: Start accepts. Automaton has 58013 states and 104047 transitions. Word has length 84 [2021-11-07 01:12:17,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:17,805 INFO L470 AbstractCegarLoop]: Abstraction has 58013 states and 104047 transitions. [2021-11-07 01:12:17,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.928571428571429) internal successors, (139), 14 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) [2021-11-07 01:12:17,805 INFO L276 IsEmpty]: Start isEmpty. Operand 58013 states and 104047 transitions. [2021-11-07 01:12:17,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 01:12:17,832 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:17,833 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:17,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-07 01:12:18,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-07 01:12:18,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:12:18,248 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:12:18,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:18,249 INFO L85 PathProgramCache]: Analyzing trace with hash -811920227, now seen corresponding path program 1 times [2021-11-07 01:12:18,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:18,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [293408445] [2021-11-07 01:12:18,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:18,250 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:18,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:18,251 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:18,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-07 01:12:19,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:19,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:12:19,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:19,805 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:12:19,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:20,132 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:12:20,132 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:20,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [293408445] [2021-11-07 01:12:20,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [293408445] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:12:20,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1622336133] [2021-11-07 01:12:20,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:20,133 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:12:20,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:12:20,134 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:12:20,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_403c9f1d-9944-40b9-8d47-0b7c6e6b048b/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-07 01:12:22,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:22,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:12:22,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:22,475 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:12:22,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:22,812 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:12:22,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1622336133] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:22,812 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:12:22,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 11 [2021-11-07 01:12:22,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005486141] [2021-11-07 01:12:22,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:12:22,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:22,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:12:22,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:12:22,815 INFO L87 Difference]: Start difference. First operand 58013 states and 104047 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:38,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:38,736 INFO L93 Difference]: Finished difference Result 108129 states and 186567 transitions. [2021-11-07 01:12:38,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:12:38,739 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-07 01:12:38,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:38,927 INFO L225 Difference]: With dead ends: 108129 [2021-11-07 01:12:38,927 INFO L226 Difference]: Without dead ends: 100895 [2021-11-07 01:12:38,948 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:12:39,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100895 states.