./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec1_product29.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_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/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_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec1_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/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_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/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 63bdee5cc43e6d0ce6e1fd7ff8178b7d4c48f0f239c647cbda6fb7b36603cc42 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:54:35,933 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:54:35,935 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:54:35,967 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:54:35,968 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:54:35,970 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:54:35,972 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:54:35,975 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:54:35,977 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:54:35,978 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:54:35,980 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:54:35,981 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:54:35,982 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:54:35,983 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:54:35,985 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:54:35,987 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:54:35,988 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:54:35,989 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:54:35,992 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:54:35,995 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:54:35,997 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:54:35,999 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:54:36,001 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:54:36,002 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:54:36,006 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:54:36,007 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:54:36,008 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:54:36,009 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:54:36,010 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:54:36,011 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:54:36,012 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:54:36,013 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:54:36,014 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:54:36,016 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:54:36,017 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:54:36,018 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:54:36,019 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:54:36,019 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:54:36,019 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:54:36,021 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:54:36,021 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:54:36,022 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:54:36,051 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:54:36,052 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:54:36,053 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:54:36,053 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:54:36,053 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:54:36,054 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:54:36,054 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:54:36,054 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:54:36,055 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:54:36,055 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:54:36,055 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:54:36,056 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:54:36,056 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:54:36,056 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:54:36,057 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:54:36,057 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:54:36,058 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:54:36,058 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:54:36,058 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:54:36,059 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:54:36,059 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:54:36,059 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:54:36,060 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:54:36,060 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:54:36,060 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:54:36,061 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:54:36,061 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:54:36,061 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:54:36,062 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:54:36,062 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:54:36,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:54:36,063 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:54:36,063 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:54:36,063 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:54:36,063 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:54:36,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:54:36,064 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:54:36,064 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:54:36,065 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:54:36,065 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_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 63bdee5cc43e6d0ce6e1fd7ff8178b7d4c48f0f239c647cbda6fb7b36603cc42 [2021-11-07 01:54:36,416 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:54:36,448 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:54:36,451 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:54:36,453 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:54:36,454 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:54:36,455 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec1_product29.cil.c [2021-11-07 01:54:36,555 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/data/ea06a195a/2b6e9e65da7049bdac2cce6d2f799bf3/FLAGa0dd0db56 [2021-11-07 01:54:37,295 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:54:37,296 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/sv-benchmarks/c/product-lines/email_spec1_product29.cil.c [2021-11-07 01:54:37,318 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/data/ea06a195a/2b6e9e65da7049bdac2cce6d2f799bf3/FLAGa0dd0db56 [2021-11-07 01:54:37,436 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/data/ea06a195a/2b6e9e65da7049bdac2cce6d2f799bf3 [2021-11-07 01:54:37,440 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:54:37,443 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:54:37,446 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:54:37,446 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:54:37,450 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:54:37,451 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:54:37" (1/1) ... [2021-11-07 01:54:37,453 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71d5294f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:54:37, skipping insertion in model container [2021-11-07 01:54:37,454 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:54:37" (1/1) ... [2021-11-07 01:54:37,462 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:54:37,568 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:54:38,140 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_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/sv-benchmarks/c/product-lines/email_spec1_product29.cil.c[32754,32767] [2021-11-07 01:54:38,310 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:54:38,324 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 01:54:38,325 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@190941e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:54:38, skipping insertion in model container [2021-11-07 01:54:38,325 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:54:38,326 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:54:38,328 INFO L168 Benchmark]: Toolchain (without parser) took 883.71 ms. Allocated memory is still 125.8 MB. Free memory was 90.7 MB in the beginning and 88.1 MB in the end (delta: 2.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:54:38,329 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 88.1 MB. Free memory is still 42.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:54:38,330 INFO L168 Benchmark]: CACSL2BoogieTranslator took 879.37 ms. Allocated memory is still 125.8 MB. Free memory was 90.7 MB in the beginning and 88.1 MB in the end (delta: 2.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:54:38,332 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 88.1 MB. Free memory is still 42.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 879.37 ms. Allocated memory is still 125.8 MB. Free memory was 90.7 MB in the beginning and 88.1 MB in the end (delta: 2.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 489]: 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_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/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_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec1_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/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_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/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 63bdee5cc43e6d0ce6e1fd7ff8178b7d4c48f0f239c647cbda6fb7b36603cc42 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:54:40,768 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:54:40,770 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:54:40,820 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:54:40,820 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:54:40,825 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:54:40,827 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:54:40,832 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:54:40,835 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:54:40,843 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:54:40,845 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:54:40,847 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:54:40,847 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:54:40,851 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:54:40,852 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:54:40,853 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:54:40,854 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:54:40,854 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:54:40,856 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:54:40,859 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:54:40,861 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:54:40,864 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:54:40,867 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:54:40,873 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:54:40,878 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:54:40,883 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:54:40,883 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:54:40,884 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:54:40,886 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:54:40,888 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:54:40,889 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:54:40,890 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:54:40,892 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:54:40,893 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:54:40,895 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:54:40,895 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:54:40,896 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:54:40,897 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:54:40,897 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:54:40,899 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:54:40,900 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:54:40,901 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:54:40,953 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:54:40,953 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:54:40,955 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:54:40,955 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:54:40,955 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:54:40,956 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:54:40,956 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:54:40,956 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:54:40,956 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:54:40,958 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:54:40,959 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:54:40,959 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:54:40,960 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:54:40,960 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:54:40,960 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:54:40,960 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:54:40,961 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:54:40,961 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:54:40,961 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:54:40,961 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:54:40,961 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:54:40,962 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:54:40,962 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:54:40,962 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:54:40,963 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:54:40,963 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:54:40,963 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:54:40,963 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:54:40,964 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:54:40,964 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:54:40,964 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:54:40,964 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:54:40,965 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:54:40,965 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:54:40,965 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:54:40,966 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_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 63bdee5cc43e6d0ce6e1fd7ff8178b7d4c48f0f239c647cbda6fb7b36603cc42 [2021-11-07 01:54:41,355 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:54:41,398 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:54:41,401 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:54:41,402 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:54:41,403 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:54:41,404 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec1_product29.cil.c [2021-11-07 01:54:41,491 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/data/2d4eae8bc/f11d897ea69743d69e82abaa3b488b57/FLAG3ebd3afb1 [2021-11-07 01:54:42,302 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:54:42,303 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/sv-benchmarks/c/product-lines/email_spec1_product29.cil.c [2021-11-07 01:54:42,336 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/data/2d4eae8bc/f11d897ea69743d69e82abaa3b488b57/FLAG3ebd3afb1 [2021-11-07 01:54:42,481 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/data/2d4eae8bc/f11d897ea69743d69e82abaa3b488b57 [2021-11-07 01:54:42,486 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:54:42,488 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:54:42,492 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:54:42,492 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:54:42,496 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:54:42,496 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:54:42" (1/1) ... [2021-11-07 01:54:42,500 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@db254eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:54:42, skipping insertion in model container [2021-11-07 01:54:42,500 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:54:42" (1/1) ... [2021-11-07 01:54:42,510 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:54:42,578 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:54:43,079 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_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/sv-benchmarks/c/product-lines/email_spec1_product29.cil.c[32754,32767] [2021-11-07 01:54:43,279 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:54:43,310 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:54:43,332 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:54:43,438 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_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/sv-benchmarks/c/product-lines/email_spec1_product29.cil.c[32754,32767] [2021-11-07 01:54:43,521 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:54:43,532 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:54:43,626 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_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/sv-benchmarks/c/product-lines/email_spec1_product29.cil.c[32754,32767] [2021-11-07 01:54:43,661 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:54:43,721 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:54:43,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:54:43 WrapperNode [2021-11-07 01:54:43,722 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:54:43,724 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:54:43,724 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:54:43,725 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:54:43,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:54:43" (1/1) ... [2021-11-07 01:54:43,811 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:54:43" (1/1) ... [2021-11-07 01:54:43,967 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:54:43,968 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:54:43,968 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:54:43,968 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:54:43,978 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:54:43" (1/1) ... [2021-11-07 01:54:43,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:54:43" (1/1) ... [2021-11-07 01:54:44,002 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:54:43" (1/1) ... [2021-11-07 01:54:44,003 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:54:43" (1/1) ... [2021-11-07 01:54:44,080 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:54:43" (1/1) ... [2021-11-07 01:54:44,133 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:54:43" (1/1) ... [2021-11-07 01:54:44,148 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:54:43" (1/1) ... [2021-11-07 01:54:44,187 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:54:44,190 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:54:44,192 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:54:44,192 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:54:44,193 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:54:43" (1/1) ... [2021-11-07 01:54:44,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:54:44,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:54:44,233 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:54:44,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:54:44,300 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:54:44,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:54:44,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:54:44,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:54:44,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:54:50,435 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:54:50,435 INFO L299 CfgBuilder]: Removed 605 assume(true) statements. [2021-11-07 01:54:50,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:54:50 BoogieIcfgContainer [2021-11-07 01:54:50,439 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:54:50,441 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:54:50,442 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:54:50,445 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:54:50,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:54:42" (1/3) ... [2021-11-07 01:54:50,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1851aeb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:54:50, skipping insertion in model container [2021-11-07 01:54:50,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:54:43" (2/3) ... [2021-11-07 01:54:50,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1851aeb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:54:50, skipping insertion in model container [2021-11-07 01:54:50,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:54:50" (3/3) ... [2021-11-07 01:54:50,448 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec1_product29.cil.c [2021-11-07 01:54:50,454 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:54:50,454 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 01:54:50,527 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:54:50,537 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 01:54:50,538 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 01:54:50,588 INFO L276 IsEmpty]: Start isEmpty. Operand has 998 states, 991 states have (on average 1.7628657921291624) internal successors, (1747), 997 states have internal predecessors, (1747), 0 states have call successors, (0), 0 states 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 01:54:50,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 01:54:50,616 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:50,617 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] [2021-11-07 01:54:50,617 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 01:54:50,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:50,624 INFO L85 PathProgramCache]: Analyzing trace with hash 14496712, now seen corresponding path program 1 times [2021-11-07 01:54:50,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:50,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1021977094] [2021-11-07 01:54:50,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:50,648 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:50,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:50,655 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:50,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:54:51,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:51,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:54:51,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:51,408 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 01:54:51,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:51,602 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 01:54:51,603 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:51,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1021977094] [2021-11-07 01:54:51,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1021977094] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:51,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:54:51,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:54:51,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301656912] [2021-11-07 01:54:51,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:54:51,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:51,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:54:51,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:54:51,637 INFO L87 Difference]: Start difference. First operand has 998 states, 991 states have (on average 1.7628657921291624) internal successors, (1747), 997 states have internal predecessors, (1747), 0 states have call successors, (0), 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 24.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 0 states 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 01:54:51,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:51,731 INFO L93 Difference]: Finished difference Result 1715 states and 2978 transitions. [2021-11-07 01:54:51,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:54:51,732 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-11-07 01:54:51,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:51,755 INFO L225 Difference]: With dead ends: 1715 [2021-11-07 01:54:51,756 INFO L226 Difference]: Without dead ends: 864 [2021-11-07 01:54:51,763 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 94 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 01:54:51,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2021-11-07 01:54:51,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 864. [2021-11-07 01:54:51,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 858 states have (on average 1.7575757575757576) internal successors, (1508), 863 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:54:51,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 1508 transitions. [2021-11-07 01:54:51,891 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 1508 transitions. Word has length 48 [2021-11-07 01:54:51,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:51,892 INFO L470 AbstractCegarLoop]: Abstraction has 864 states and 1508 transitions. [2021-11-07 01:54:51,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 0 states 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 01:54:51,893 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 1508 transitions. [2021-11-07 01:54:51,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 01:54:51,898 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:51,898 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:54:51,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:52,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:52,113 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 01:54:52,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:52,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1411858955, now seen corresponding path program 1 times [2021-11-07 01:54:52,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:52,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [166399943] [2021-11-07 01:54:52,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:52,120 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:52,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:52,123 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:52,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:54:52,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:52,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:54:52,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:52,713 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 01:54:52,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:52,962 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 01:54:52,962 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:52,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [166399943] [2021-11-07 01:54:52,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [166399943] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:52,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:54:52,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:54:52,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662331338] [2021-11-07 01:54:52,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:54:52,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:52,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:54:52,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:54:52,966 INFO L87 Difference]: Start difference. First operand 864 states and 1508 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states 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 01:54:53,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:53,141 INFO L93 Difference]: Finished difference Result 2562 states and 4476 transitions. [2021-11-07 01:54:53,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:54:53,142 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-07 01:54:53,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:53,161 INFO L225 Difference]: With dead ends: 2562 [2021-11-07 01:54:53,161 INFO L226 Difference]: Without dead ends: 1713 [2021-11-07 01:54:53,164 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 94 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 01:54:53,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1713 states. [2021-11-07 01:54:53,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1713 to 863. [2021-11-07 01:54:53,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 857 states have (on average 1.7537922987164527) internal successors, (1503), 862 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states 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 01:54:53,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1503 transitions. [2021-11-07 01:54:53,226 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1503 transitions. Word has length 49 [2021-11-07 01:54:53,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:53,227 INFO L470 AbstractCegarLoop]: Abstraction has 863 states and 1503 transitions. [2021-11-07 01:54:53,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states 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 01:54:53,227 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1503 transitions. [2021-11-07 01:54:53,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 01:54:53,240 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:53,240 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] [2021-11-07 01:54:53,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:53,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:53,460 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 01:54:53,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:53,461 INFO L85 PathProgramCache]: Analyzing trace with hash 224616795, now seen corresponding path program 1 times [2021-11-07 01:54:53,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:53,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1977455463] [2021-11-07 01:54:53,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:53,463 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:53,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:53,464 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:53,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:54:53,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:53,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:54:53,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:54,112 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 01:54:54,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:54,291 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 01:54:54,292 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:54,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1977455463] [2021-11-07 01:54:54,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1977455463] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:54,293 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:54:54,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:54:54,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627845379] [2021-11-07 01:54:54,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:54:54,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:54,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:54:54,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:54:54,297 INFO L87 Difference]: Start difference. First operand 863 states and 1503 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states 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 01:54:54,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:54,653 INFO L93 Difference]: Finished difference Result 3369 states and 5874 transitions. [2021-11-07 01:54:54,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:54:54,654 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 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 51 [2021-11-07 01:54:54,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:54,671 INFO L225 Difference]: With dead ends: 3369 [2021-11-07 01:54:54,671 INFO L226 Difference]: Without dead ends: 2524 [2021-11-07 01:54:54,674 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 96 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 01:54:54,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2524 states. [2021-11-07 01:54:54,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2524 to 862. [2021-11-07 01:54:54,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 856 states have (on average 1.7511682242990654) internal successors, (1499), 861 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states 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 01:54:54,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1499 transitions. [2021-11-07 01:54:54,784 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1499 transitions. Word has length 51 [2021-11-07 01:54:54,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:54,784 INFO L470 AbstractCegarLoop]: Abstraction has 862 states and 1499 transitions. [2021-11-07 01:54:54,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states 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 01:54:54,787 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1499 transitions. [2021-11-07 01:54:54,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 01:54:54,790 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:54,790 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] [2021-11-07 01:54:54,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:55,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:55,005 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 01:54:55,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:55,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1479600914, now seen corresponding path program 1 times [2021-11-07 01:54:55,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:55,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1183733837] [2021-11-07 01:54:55,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:55,008 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:55,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:55,011 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:55,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:54:55,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:55,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:54:55,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:55,644 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 01:54:55,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:55,820 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 01:54:55,820 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:55,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1183733837] [2021-11-07 01:54:55,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1183733837] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:55,821 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:54:55,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:54:55,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704231399] [2021-11-07 01:54:55,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:54:55,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:55,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:54:55,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:54:55,823 INFO L87 Difference]: Start difference. First operand 862 states and 1499 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 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 01:54:55,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:55,938 INFO L93 Difference]: Finished difference Result 1721 states and 2995 transitions. [2021-11-07 01:54:55,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:54:55,938 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 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 52 [2021-11-07 01:54:55,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:55,944 INFO L225 Difference]: With dead ends: 1721 [2021-11-07 01:54:55,944 INFO L226 Difference]: Without dead ends: 867 [2021-11-07 01:54:55,946 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 100 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 01:54:55,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2021-11-07 01:54:56,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 862. [2021-11-07 01:54:56,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 856 states have (on average 1.7476635514018692) internal successors, (1496), 861 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states 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 01:54:56,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1496 transitions. [2021-11-07 01:54:56,023 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1496 transitions. Word has length 52 [2021-11-07 01:54:56,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:56,024 INFO L470 AbstractCegarLoop]: Abstraction has 862 states and 1496 transitions. [2021-11-07 01:54:56,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 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 01:54:56,024 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1496 transitions. [2021-11-07 01:54:56,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 01:54:56,026 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:56,026 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] [2021-11-07 01:54:56,042 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-07 01:54:56,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:56,244 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 01:54:56,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:56,244 INFO L85 PathProgramCache]: Analyzing trace with hash -574038973, now seen corresponding path program 1 times [2021-11-07 01:54:56,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:56,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1707091617] [2021-11-07 01:54:56,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:56,246 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:56,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:56,247 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:56,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:54:56,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:56,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:54:56,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:56,888 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 01:54:56,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:57,059 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 01:54:57,059 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:57,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1707091617] [2021-11-07 01:54:57,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1707091617] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:57,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:54:57,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:54:57,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797469372] [2021-11-07 01:54:57,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:54:57,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:57,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:54:57,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:54:57,062 INFO L87 Difference]: Start difference. First operand 862 states and 1496 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 01:54:57,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:57,471 INFO L93 Difference]: Finished difference Result 3356 states and 5850 transitions. [2021-11-07 01:54:57,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:54:57,472 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 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 53 [2021-11-07 01:54:57,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:57,488 INFO L225 Difference]: With dead ends: 3356 [2021-11-07 01:54:57,488 INFO L226 Difference]: Without dead ends: 2520 [2021-11-07 01:54:57,490 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 100 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 01:54:57,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2520 states. [2021-11-07 01:54:57,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2520 to 862. [2021-11-07 01:54:57,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 856 states have (on average 1.7441588785046729) internal successors, (1493), 861 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states 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 01:54:57,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1493 transitions. [2021-11-07 01:54:57,574 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1493 transitions. Word has length 53 [2021-11-07 01:54:57,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:57,574 INFO L470 AbstractCegarLoop]: Abstraction has 862 states and 1493 transitions. [2021-11-07 01:54:57,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 01:54:57,575 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1493 transitions. [2021-11-07 01:54:57,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 01:54:57,576 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:57,577 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 01:54:57,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:57,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:57,791 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 01:54:57,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:57,791 INFO L85 PathProgramCache]: Analyzing trace with hash -132911810, now seen corresponding path program 1 times [2021-11-07 01:54:57,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:57,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2112180109] [2021-11-07 01:54:57,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:57,793 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:57,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:57,794 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:57,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:54:58,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:58,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:54:58,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:58,450 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 01:54:58,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:58,608 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 01:54:58,608 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:58,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2112180109] [2021-11-07 01:54:58,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2112180109] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:58,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:54:58,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:54:58,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722769652] [2021-11-07 01:54:58,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:54:58,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:58,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:54:58,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:54:58,613 INFO L87 Difference]: Start difference. First operand 862 states and 1493 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 01:54:58,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:58,783 INFO L93 Difference]: Finished difference Result 2281 states and 3951 transitions. [2021-11-07 01:54:58,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:54:58,784 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 55 [2021-11-07 01:54:58,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:58,795 INFO L225 Difference]: With dead ends: 2281 [2021-11-07 01:54:58,796 INFO L226 Difference]: Without dead ends: 1698 [2021-11-07 01:54:58,798 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 106 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 01:54:58,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2021-11-07 01:54:58,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 1115. [2021-11-07 01:54:58,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1115 states, 1109 states have (on average 1.7664562669071235) internal successors, (1959), 1114 states have internal predecessors, (1959), 0 states have call successors, (0), 0 states 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 01:54:58,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 1959 transitions. [2021-11-07 01:54:58,903 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 1959 transitions. Word has length 55 [2021-11-07 01:54:58,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:58,904 INFO L470 AbstractCegarLoop]: Abstraction has 1115 states and 1959 transitions. [2021-11-07 01:54:58,904 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 01:54:58,904 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 1959 transitions. [2021-11-07 01:54:58,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:54:58,907 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:58,907 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:54:58,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:59,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:59,123 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 01:54:59,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:59,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1059911279, now seen corresponding path program 1 times [2021-11-07 01:54:59,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:59,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [563974478] [2021-11-07 01:54:59,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:59,125 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:59,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:59,129 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:59,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:54:59,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:59,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:54:59,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:59,872 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 01:54:59,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:00,056 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 01:55:00,057 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:00,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [563974478] [2021-11-07 01:55:00,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [563974478] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:00,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:00,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:55:00,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201575616] [2021-11-07 01:55:00,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:55:00,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:00,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:55:00,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:55:00,060 INFO L87 Difference]: Start difference. First operand 1115 states and 1959 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 01:55:00,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:00,217 INFO L93 Difference]: Finished difference Result 2930 states and 5150 transitions. [2021-11-07 01:55:00,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:55:00,217 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 01:55:00,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:00,230 INFO L225 Difference]: With dead ends: 2930 [2021-11-07 01:55:00,231 INFO L226 Difference]: Without dead ends: 1899 [2021-11-07 01:55:00,234 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 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 01:55:00,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2021-11-07 01:55:00,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1316. [2021-11-07 01:55:00,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1316 states, 1310 states have (on average 1.7770992366412213) internal successors, (2328), 1315 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states 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 01:55:00,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1316 states to 1316 states and 2328 transitions. [2021-11-07 01:55:00,344 INFO L78 Accepts]: Start accepts. Automaton has 1316 states and 2328 transitions. Word has length 67 [2021-11-07 01:55:00,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:00,346 INFO L470 AbstractCegarLoop]: Abstraction has 1316 states and 2328 transitions. [2021-11-07 01:55:00,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 01:55:00,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1316 states and 2328 transitions. [2021-11-07 01:55:00,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:55:00,350 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:00,350 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] [2021-11-07 01:55:00,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:00,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:00,563 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 01:55:00,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:00,564 INFO L85 PathProgramCache]: Analyzing trace with hash -562951474, now seen corresponding path program 1 times [2021-11-07 01:55:00,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:00,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1214452154] [2021-11-07 01:55:00,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:00,566 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:00,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:00,567 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:00,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:55:01,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:01,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:55:01,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:01,246 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 01:55:01,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:01,427 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 01:55:01,428 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:01,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1214452154] [2021-11-07 01:55:01,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1214452154] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:01,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:01,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:55:01,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056978457] [2021-11-07 01:55:01,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:55:01,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:01,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:55:01,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:55:01,430 INFO L87 Difference]: Start difference. First operand 1316 states and 2328 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:01,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:01,601 INFO L93 Difference]: Finished difference Result 3577 states and 6343 transitions. [2021-11-07 01:55:01,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:55:01,602 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 01:55:01,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:01,617 INFO L225 Difference]: With dead ends: 3577 [2021-11-07 01:55:01,617 INFO L226 Difference]: Without dead ends: 2349 [2021-11-07 01:55:01,620 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 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 01:55:01,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2349 states. [2021-11-07 01:55:01,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2349 to 1766. [2021-11-07 01:55:01,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1766 states, 1760 states have (on average 1.7931818181818182) internal successors, (3156), 1765 states have internal predecessors, (3156), 0 states have call successors, (0), 0 states 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 01:55:01,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1766 states to 1766 states and 3156 transitions. [2021-11-07 01:55:01,777 INFO L78 Accepts]: Start accepts. Automaton has 1766 states and 3156 transitions. Word has length 68 [2021-11-07 01:55:01,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:01,778 INFO L470 AbstractCegarLoop]: Abstraction has 1766 states and 3156 transitions. [2021-11-07 01:55:01,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:01,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1766 states and 3156 transitions. [2021-11-07 01:55:01,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:55:01,782 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:01,782 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] [2021-11-07 01:55:01,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:01,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:01,999 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 01:55:02,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:02,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1231080802, now seen corresponding path program 1 times [2021-11-07 01:55:02,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:02,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [894157944] [2021-11-07 01:55:02,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:02,001 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:02,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:02,002 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:02,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:55:02,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:02,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:55:02,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:02,764 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 01:55:02,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:02,931 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 01:55:02,931 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:02,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [894157944] [2021-11-07 01:55:02,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [894157944] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:02,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:02,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:55:02,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877303100] [2021-11-07 01:55:02,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:55:02,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:02,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:55:02,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:55:02,933 INFO L87 Difference]: Start difference. First operand 1766 states and 3156 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 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 01:55:03,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:03,124 INFO L93 Difference]: Finished difference Result 3830 states and 6806 transitions. [2021-11-07 01:55:03,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:55:03,124 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 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 69 [2021-11-07 01:55:03,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:03,139 INFO L225 Difference]: With dead ends: 3830 [2021-11-07 01:55:03,140 INFO L226 Difference]: Without dead ends: 2349 [2021-11-07 01:55:03,142 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 134 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 01:55:03,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2349 states. [2021-11-07 01:55:03,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2349 to 1766. [2021-11-07 01:55:03,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1766 states, 1760 states have (on average 1.7920454545454545) internal successors, (3154), 1765 states have internal predecessors, (3154), 0 states have call successors, (0), 0 states 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 01:55:03,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1766 states to 1766 states and 3154 transitions. [2021-11-07 01:55:03,278 INFO L78 Accepts]: Start accepts. Automaton has 1766 states and 3154 transitions. Word has length 69 [2021-11-07 01:55:03,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:03,279 INFO L470 AbstractCegarLoop]: Abstraction has 1766 states and 3154 transitions. [2021-11-07 01:55:03,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 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 01:55:03,279 INFO L276 IsEmpty]: Start isEmpty. Operand 1766 states and 3154 transitions. [2021-11-07 01:55:03,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:55:03,287 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:03,287 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] [2021-11-07 01:55:03,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:03,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:03,504 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 01:55:03,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:03,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1774705565, now seen corresponding path program 1 times [2021-11-07 01:55:03,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:03,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [732542300] [2021-11-07 01:55:03,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:03,505 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:03,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:03,507 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:03,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:55:04,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:04,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:55:04,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:04,270 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 01:55:04,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:04,429 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 01:55:04,430 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:04,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [732542300] [2021-11-07 01:55:04,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [732542300] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:04,430 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:04,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:55:04,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355668945] [2021-11-07 01:55:04,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:55:04,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:04,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:55:04,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:55:04,433 INFO L87 Difference]: Start difference. First operand 1766 states and 3154 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:04,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:04,628 INFO L93 Difference]: Finished difference Result 4899 states and 8776 transitions. [2021-11-07 01:55:04,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:55:04,629 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 01:55:04,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:04,650 INFO L225 Difference]: With dead ends: 4899 [2021-11-07 01:55:04,650 INFO L226 Difference]: Without dead ends: 3229 [2021-11-07 01:55:04,654 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 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 01:55:04,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3229 states. [2021-11-07 01:55:04,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3229 to 2646. [2021-11-07 01:55:04,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2646 states, 2640 states have (on average 1.8079545454545454) internal successors, (4773), 2645 states have internal predecessors, (4773), 0 states have call successors, (0), 0 states 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 01:55:04,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2646 states to 2646 states and 4773 transitions. [2021-11-07 01:55:04,862 INFO L78 Accepts]: Start accepts. Automaton has 2646 states and 4773 transitions. Word has length 69 [2021-11-07 01:55:04,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:04,862 INFO L470 AbstractCegarLoop]: Abstraction has 2646 states and 4773 transitions. [2021-11-07 01:55:04,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:04,862 INFO L276 IsEmpty]: Start isEmpty. Operand 2646 states and 4773 transitions. [2021-11-07 01:55:04,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:55:04,868 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:04,868 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] [2021-11-07 01:55:04,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:05,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:05,084 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 01:55:05,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:05,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1563072656, now seen corresponding path program 1 times [2021-11-07 01:55:05,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:05,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [938030585] [2021-11-07 01:55:05,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:05,086 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:05,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:05,087 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:05,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:55:05,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:05,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:55:05,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:05,850 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 01:55:05,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:06,042 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 01:55:06,042 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:06,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [938030585] [2021-11-07 01:55:06,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [938030585] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:06,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:06,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:55:06,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969737659] [2021-11-07 01:55:06,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:55:06,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:06,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:55:06,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:55:06,045 INFO L87 Difference]: Start difference. First operand 2646 states and 4773 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:06,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:06,325 INFO L93 Difference]: Finished difference Result 7275 states and 13152 transitions. [2021-11-07 01:55:06,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:55:06,326 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 01:55:06,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:06,371 INFO L225 Difference]: With dead ends: 7275 [2021-11-07 01:55:06,372 INFO L226 Difference]: Without dead ends: 4759 [2021-11-07 01:55:06,399 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 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 01:55:06,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4759 states. [2021-11-07 01:55:06,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4759 to 4176. [2021-11-07 01:55:06,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4176 states, 4170 states have (on average 1.8191846522781774) internal successors, (7586), 4175 states have internal predecessors, (7586), 0 states have call successors, (0), 0 states 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 01:55:06,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4176 states to 4176 states and 7586 transitions. [2021-11-07 01:55:06,669 INFO L78 Accepts]: Start accepts. Automaton has 4176 states and 7586 transitions. Word has length 70 [2021-11-07 01:55:06,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:06,671 INFO L470 AbstractCegarLoop]: Abstraction has 4176 states and 7586 transitions. [2021-11-07 01:55:06,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:06,671 INFO L276 IsEmpty]: Start isEmpty. Operand 4176 states and 7586 transitions. [2021-11-07 01:55:06,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:55:06,678 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:06,678 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:55:06,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:06,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:06,891 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 01:55:06,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:06,892 INFO L85 PathProgramCache]: Analyzing trace with hash 2005162926, now seen corresponding path program 1 times [2021-11-07 01:55:06,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:06,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1089703529] [2021-11-07 01:55:06,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:06,893 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:06,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:06,894 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:06,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:55:07,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:07,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:55:07,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:07,719 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 01:55:07,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:07,868 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 01:55:07,868 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:07,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1089703529] [2021-11-07 01:55:07,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1089703529] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:07,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:07,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:55:07,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018092679] [2021-11-07 01:55:07,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:55:07,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:07,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:55:07,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:55:07,870 INFO L87 Difference]: Start difference. First operand 4176 states and 7586 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:08,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:08,272 INFO L93 Difference]: Finished difference Result 11581 states and 21074 transitions. [2021-11-07 01:55:08,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:55:08,273 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 01:55:08,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:08,296 INFO L225 Difference]: With dead ends: 11581 [2021-11-07 01:55:08,297 INFO L226 Difference]: Without dead ends: 7569 [2021-11-07 01:55:08,304 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 139 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 01:55:08,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7569 states. [2021-11-07 01:55:08,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7569 to 6986. [2021-11-07 01:55:08,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6986 states, 6980 states have (on average 1.8262177650429798) internal successors, (12747), 6985 states have internal predecessors, (12747), 0 states have call successors, (0), 0 states 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 01:55:08,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6986 states to 6986 states and 12747 transitions. [2021-11-07 01:55:08,855 INFO L78 Accepts]: Start accepts. Automaton has 6986 states and 12747 transitions. Word has length 71 [2021-11-07 01:55:08,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:08,855 INFO L470 AbstractCegarLoop]: Abstraction has 6986 states and 12747 transitions. [2021-11-07 01:55:08,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:08,856 INFO L276 IsEmpty]: Start isEmpty. Operand 6986 states and 12747 transitions. [2021-11-07 01:55:08,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:55:08,864 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:08,864 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] [2021-11-07 01:55:08,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:09,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:09,081 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 01:55:09,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:09,082 INFO L85 PathProgramCache]: Analyzing trace with hash 2136966642, now seen corresponding path program 1 times [2021-11-07 01:55:09,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:09,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2023438905] [2021-11-07 01:55:09,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:09,084 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:09,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:09,085 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:09,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:55:09,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:09,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:55:09,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:09,920 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 01:55:09,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:10,127 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 01:55:10,127 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:10,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2023438905] [2021-11-07 01:55:10,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2023438905] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:10,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:10,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:55:10,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575716862] [2021-11-07 01:55:10,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:55:10,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:10,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:55:10,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:55:10,129 INFO L87 Difference]: Start difference. First operand 6986 states and 12747 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states 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 01:55:13,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:13,348 INFO L93 Difference]: Finished difference Result 26467 states and 48344 transitions. [2021-11-07 01:55:13,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:55:13,349 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 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 72 [2021-11-07 01:55:13,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:13,409 INFO L225 Difference]: With dead ends: 26467 [2021-11-07 01:55:13,410 INFO L226 Difference]: Without dead ends: 19764 [2021-11-07 01:55:13,423 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 138 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 01:55:13,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19764 states. [2021-11-07 01:55:13,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19764 to 6936. [2021-11-07 01:55:13,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6936 states, 6930 states have (on average 1.8105339105339104) internal successors, (12547), 6935 states have internal predecessors, (12547), 0 states have call successors, (0), 0 states 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 01:55:13,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6936 states to 6936 states and 12547 transitions. [2021-11-07 01:55:13,976 INFO L78 Accepts]: Start accepts. Automaton has 6936 states and 12547 transitions. Word has length 72 [2021-11-07 01:55:13,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:13,976 INFO L470 AbstractCegarLoop]: Abstraction has 6936 states and 12547 transitions. [2021-11-07 01:55:13,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states 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 01:55:13,977 INFO L276 IsEmpty]: Start isEmpty. Operand 6936 states and 12547 transitions. [2021-11-07 01:55:13,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:55:13,985 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:13,985 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] [2021-11-07 01:55:14,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:14,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:14,202 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 01:55:14,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:14,202 INFO L85 PathProgramCache]: Analyzing trace with hash -6572351, now seen corresponding path program 1 times [2021-11-07 01:55:14,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:14,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [159086782] [2021-11-07 01:55:14,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:14,204 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:14,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:14,205 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:14,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:55:14,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:14,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:55:14,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:15,099 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 01:55:15,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:15,290 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 01:55:15,290 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:15,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [159086782] [2021-11-07 01:55:15,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [159086782] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:15,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:15,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:55:15,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046869011] [2021-11-07 01:55:15,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:55:15,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:15,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:55:15,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:55:15,292 INFO L87 Difference]: Start difference. First operand 6936 states and 12547 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:15,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:15,772 INFO L93 Difference]: Finished difference Result 20322 states and 36811 transitions. [2021-11-07 01:55:15,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:55:15,773 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 01:55:15,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:15,806 INFO L225 Difference]: With dead ends: 20322 [2021-11-07 01:55:15,807 INFO L226 Difference]: Without dead ends: 13553 [2021-11-07 01:55:15,818 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 141 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 01:55:15,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13553 states. [2021-11-07 01:55:16,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13553 to 12970. [2021-11-07 01:55:16,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12970 states, 12964 states have (on average 1.8133292193767356) internal successors, (23508), 12969 states have internal predecessors, (23508), 0 states have call successors, (0), 0 states 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 01:55:16,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12970 states to 12970 states and 23508 transitions. [2021-11-07 01:55:16,646 INFO L78 Accepts]: Start accepts. Automaton has 12970 states and 23508 transitions. Word has length 72 [2021-11-07 01:55:16,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:16,647 INFO L470 AbstractCegarLoop]: Abstraction has 12970 states and 23508 transitions. [2021-11-07 01:55:16,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:16,647 INFO L276 IsEmpty]: Start isEmpty. Operand 12970 states and 23508 transitions. [2021-11-07 01:55:16,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:55:16,656 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:16,657 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] [2021-11-07 01:55:16,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:16,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:16,874 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 01:55:16,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:16,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1750007021, now seen corresponding path program 1 times [2021-11-07 01:55:16,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:16,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1180585255] [2021-11-07 01:55:16,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:16,876 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:16,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:16,877 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:16,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:55:17,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:17,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:55:17,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:17,782 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 01:55:17,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:18,013 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 01:55:18,014 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:18,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1180585255] [2021-11-07 01:55:18,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1180585255] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:55:18,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [785484667] [2021-11-07 01:55:18,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:18,015 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:55:18,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:55:18,020 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:55:18,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 01:55:18,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:18,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:55:18,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:19,190 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 01:55:19,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:19,477 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 01:55:19,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [785484667] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:19,478 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:55:19,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 01:55:19,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867565999] [2021-11-07 01:55:19,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:55:19,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:19,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:55:19,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:55:19,480 INFO L87 Difference]: Start difference. First operand 12970 states and 23508 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 01:55:20,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:20,267 INFO L93 Difference]: Finished difference Result 13435 states and 24301 transitions. [2021-11-07 01:55:20,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:55:20,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 01:55:20,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:20,294 INFO L225 Difference]: With dead ends: 13435 [2021-11-07 01:55:20,294 INFO L226 Difference]: Without dead ends: 12958 [2021-11-07 01:55:20,298 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:55:20,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12958 states. [2021-11-07 01:55:20,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12958 to 12958. [2021-11-07 01:55:20,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12958 states, 12954 states have (on average 1.8133395090319593) internal successors, (23490), 12957 states have internal predecessors, (23490), 0 states have call successors, (0), 0 states 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 01:55:20,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12958 states to 12958 states and 23490 transitions. [2021-11-07 01:55:20,948 INFO L78 Accepts]: Start accepts. Automaton has 12958 states and 23490 transitions. Word has length 73 [2021-11-07 01:55:20,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:20,949 INFO L470 AbstractCegarLoop]: Abstraction has 12958 states and 23490 transitions. [2021-11-07 01:55:20,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 01:55:20,949 INFO L276 IsEmpty]: Start isEmpty. Operand 12958 states and 23490 transitions. [2021-11-07 01:55:20,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-07 01:55:20,974 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:20,975 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, 1, 1, 1, 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 01:55:20,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-11-07 01:55:21,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:21,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:21,380 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:55:21,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:21,380 INFO L85 PathProgramCache]: Analyzing trace with hash 387015402, now seen corresponding path program 1 times [2021-11-07 01:55:21,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:21,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2076178868] [2021-11-07 01:55:21,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:21,382 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:21,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:21,383 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:21,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:55:22,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:22,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:55:22,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:22,436 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 01:55:22,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:22,756 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 01:55:22,756 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:22,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2076178868] [2021-11-07 01:55:22,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2076178868] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:55:22,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1995382956] [2021-11-07 01:55:22,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:22,757 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:55:22,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:55:22,758 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:55:22,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 01:55:23,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:23,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:55:23,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:24,058 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 01:55:24,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:24,416 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 01:55:24,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1995382956] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:24,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:55:24,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 16 [2021-11-07 01:55:24,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420372347] [2021-11-07 01:55:24,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:55:24,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:24,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:55:24,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:55:24,420 INFO L87 Difference]: Start difference. First operand 12958 states and 23490 transitions. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states 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 01:55:31,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:31,563 INFO L93 Difference]: Finished difference Result 83630 states and 151559 transitions. [2021-11-07 01:55:31,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 01:55:31,564 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-07 01:55:31,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:31,742 INFO L225 Difference]: With dead ends: 83630 [2021-11-07 01:55:31,743 INFO L226 Difference]: Without dead ends: 83077 [2021-11-07 01:55:31,765 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 430 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 01:55:31,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83077 states. [2021-11-07 01:55:33,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83077 to 25687. [2021-11-07 01:55:33,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25687 states, 25683 states have (on average 1.8141182883619515) internal successors, (46592), 25686 states have internal predecessors, (46592), 0 states have call successors, (0), 0 states 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 01:55:33,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25687 states to 25687 states and 46592 transitions. [2021-11-07 01:55:33,993 INFO L78 Accepts]: Start accepts. Automaton has 25687 states and 46592 transitions. Word has length 112 [2021-11-07 01:55:33,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:33,994 INFO L470 AbstractCegarLoop]: Abstraction has 25687 states and 46592 transitions. [2021-11-07 01:55:33,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states 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 01:55:33,994 INFO L276 IsEmpty]: Start isEmpty. Operand 25687 states and 46592 transitions. [2021-11-07 01:55:34,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-07 01:55:34,030 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:34,030 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, 1, 1, 1, 1, 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 01:55:34,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:34,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-11-07 01:55:34,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:55:34,431 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:55:34,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:34,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1396025623, now seen corresponding path program 1 times [2021-11-07 01:55:34,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:34,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [407295830] [2021-11-07 01:55:34,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:34,432 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:34,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:34,433 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:34,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:55:35,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:35,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:55:35,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:35,547 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 01:55:35,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:35,805 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 01:55:35,805 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:35,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [407295830] [2021-11-07 01:55:35,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [407295830] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:35,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:35,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:55:35,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136266315] [2021-11-07 01:55:35,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:55:35,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:35,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:55:35,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:55:35,807 INFO L87 Difference]: Start difference. First operand 25687 states and 46592 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 01:55:37,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:37,409 INFO L93 Difference]: Finished difference Result 50555 states and 91920 transitions. [2021-11-07 01:55:37,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:55:37,409 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-07 01:55:37,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:37,448 INFO L225 Difference]: With dead ends: 50555 [2021-11-07 01:55:37,448 INFO L226 Difference]: Without dead ends: 25154 [2021-11-07 01:55:37,475 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 222 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 01:55:37,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25154 states. [2021-11-07 01:55:38,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25154 to 12960. [2021-11-07 01:55:38,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12960 states, 12956 states have (on average 1.8129824019759184) internal successors, (23489), 12959 states have internal predecessors, (23489), 0 states have call successors, (0), 0 states 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 01:55:38,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12960 states to 12960 states and 23489 transitions. [2021-11-07 01:55:38,431 INFO L78 Accepts]: Start accepts. Automaton has 12960 states and 23489 transitions. Word has length 113 [2021-11-07 01:55:38,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:38,431 INFO L470 AbstractCegarLoop]: Abstraction has 12960 states and 23489 transitions. [2021-11-07 01:55:38,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 01:55:38,431 INFO L276 IsEmpty]: Start isEmpty. Operand 12960 states and 23489 transitions. [2021-11-07 01:55:38,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-07 01:55:38,450 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:38,451 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, 1, 1, 1, 1, 1, 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 01:55:38,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:38,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:38,655 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:55:38,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:38,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1046369573, now seen corresponding path program 1 times [2021-11-07 01:55:38,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:38,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1320108085] [2021-11-07 01:55:38,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:38,656 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:38,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:38,657 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:38,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 01:55:39,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:39,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:55:39,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:39,859 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 01:55:39,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:40,184 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 01:55:40,184 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:40,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1320108085] [2021-11-07 01:55:40,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1320108085] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:55:40,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [378524952] [2021-11-07 01:55:40,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:40,185 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:55:40,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:55:40,185 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:55:40,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-07 01:55:41,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:41,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:55:41,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:41,770 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 01:55:41,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:42,078 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 01:55:42,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [378524952] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:42,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:55:42,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-07 01:55:42,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831288617] [2021-11-07 01:55:42,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:55:42,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:42,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:55:42,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:55:42,080 INFO L87 Difference]: Start difference. First operand 12960 states and 23489 transitions. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states 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 01:55:45,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:45,010 INFO L93 Difference]: Finished difference Result 13960 states and 25195 transitions. [2021-11-07 01:55:45,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:55:45,011 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 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 114 [2021-11-07 01:55:45,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:45,031 INFO L225 Difference]: With dead ends: 13960 [2021-11-07 01:55:45,031 INFO L226 Difference]: Without dead ends: 13396 [2021-11-07 01:55:45,035 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 443 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:55:45,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13396 states. [2021-11-07 01:55:46,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13396 to 12956. [2021-11-07 01:55:46,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12956 states, 12952 states have (on average 1.8129246448424954) internal successors, (23481), 12955 states have internal predecessors, (23481), 0 states have call successors, (0), 0 states 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 01:55:46,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12956 states to 12956 states and 23481 transitions. [2021-11-07 01:55:46,059 INFO L78 Accepts]: Start accepts. Automaton has 12956 states and 23481 transitions. Word has length 114 [2021-11-07 01:55:46,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:46,059 INFO L470 AbstractCegarLoop]: Abstraction has 12956 states and 23481 transitions. [2021-11-07 01:55:46,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states 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 01:55:46,059 INFO L276 IsEmpty]: Start isEmpty. Operand 12956 states and 23481 transitions. [2021-11-07 01:55:46,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-07 01:55:46,076 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:46,076 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, 1, 1, 1, 1, 1, 1, 1, 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 01:55:46,097 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-11-07 01:55:46,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:46,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:55:46,498 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:55:46,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:46,498 INFO L85 PathProgramCache]: Analyzing trace with hash 276830611, now seen corresponding path program 1 times [2021-11-07 01:55:46,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:46,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [289855761] [2021-11-07 01:55:46,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:46,500 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:46,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:46,506 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:46,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 01:55:47,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:47,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:55:47,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:47,835 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 01:55:47,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:48,157 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 01:55:48,158 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:48,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [289855761] [2021-11-07 01:55:48,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [289855761] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:55:48,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [322865153] [2021-11-07 01:55:48,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:48,158 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:55:48,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:55:48,160 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:55:48,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-07 01:55:49,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:49,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:55:49,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:50,368 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 01:55:50,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:50,994 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 01:55:50,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [322865153] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:50,994 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:55:50,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 01:55:50,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718551498] [2021-11-07 01:55:50,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:55:50,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:50,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:55:50,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:55:50,997 INFO L87 Difference]: Start difference. First operand 12956 states and 23481 transitions. Second operand has 16 states, 16 states have (on average 10.5) internal successors, (168), 15 states have internal predecessors, (168), 0 states have call successors, (0), 0 states 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 01:56:11,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:56:11,686 INFO L93 Difference]: Finished difference Result 29858 states and 53536 transitions. [2021-11-07 01:56:11,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 01:56:11,687 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 10.5) internal successors, (168), 15 states have internal predecessors, (168), 0 states have call successors, (0), 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 116 [2021-11-07 01:56:11,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:56:11,730 INFO L225 Difference]: With dead ends: 29858 [2021-11-07 01:56:11,730 INFO L226 Difference]: Without dead ends: 29353 [2021-11-07 01:56:11,736 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 440 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=409, Invalid=1313, Unknown=0, NotChecked=0, Total=1722 [2021-11-07 01:56:11,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29353 states. [2021-11-07 01:56:13,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29353 to 25654. [2021-11-07 01:56:13,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25654 states, 25650 states have (on average 1.8139961013645225) internal successors, (46529), 25653 states have internal predecessors, (46529), 0 states have call successors, (0), 0 states 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 01:56:13,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25654 states to 25654 states and 46529 transitions. [2021-11-07 01:56:13,364 INFO L78 Accepts]: Start accepts. Automaton has 25654 states and 46529 transitions. Word has length 116 [2021-11-07 01:56:13,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:56:13,364 INFO L470 AbstractCegarLoop]: Abstraction has 25654 states and 46529 transitions. [2021-11-07 01:56:13,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 10.5) internal successors, (168), 15 states have internal predecessors, (168), 0 states have call successors, (0), 0 states 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 01:56:13,365 INFO L276 IsEmpty]: Start isEmpty. Operand 25654 states and 46529 transitions. [2021-11-07 01:56:13,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-07 01:56:13,392 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:56:13,392 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:56:13,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:13,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:13,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:56:13,807 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:56:13,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:56:13,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1947978123, now seen corresponding path program 1 times [2021-11-07 01:56:13,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:56:13,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1967291522] [2021-11-07 01:56:13,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:13,809 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:56:13,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:56:13,810 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:56:13,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 01:56:14,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:14,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:56:14,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:15,227 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 01:56:15,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:15,601 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 01:56:15,601 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:15,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1967291522] [2021-11-07 01:56:15,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1967291522] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:56:15,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2114420874] [2021-11-07 01:56:15,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:15,602 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:56:15,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:56:15,612 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:56:15,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-07 01:56:17,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:17,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:56:17,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:17,390 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 01:56:17,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:17,671 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 01:56:17,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2114420874] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:56:17,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:56:17,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 01:56:17,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19612762] [2021-11-07 01:56:17,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:56:17,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:56:17,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:56:17,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:56:17,673 INFO L87 Difference]: Start difference. First operand 25654 states and 46529 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 01:56:19,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:56:19,086 INFO L93 Difference]: Finished difference Result 26694 states and 48296 transitions. [2021-11-07 01:56:19,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:56:19,087 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 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 117 [2021-11-07 01:56:19,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:56:19,125 INFO L225 Difference]: With dead ends: 26694 [2021-11-07 01:56:19,125 INFO L226 Difference]: Without dead ends: 26128 [2021-11-07 01:56:19,130 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 456 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:56:19,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26128 states. [2021-11-07 01:56:20,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26128 to 25653. [2021-11-07 01:56:20,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25653 states, 25649 states have (on average 1.8139108737182736) internal successors, (46525), 25652 states have internal predecessors, (46525), 0 states have call successors, (0), 0 states 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 01:56:20,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25653 states to 25653 states and 46525 transitions. [2021-11-07 01:56:20,739 INFO L78 Accepts]: Start accepts. Automaton has 25653 states and 46525 transitions. Word has length 117 [2021-11-07 01:56:20,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:56:20,740 INFO L470 AbstractCegarLoop]: Abstraction has 25653 states and 46525 transitions. [2021-11-07 01:56:20,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 01:56:20,740 INFO L276 IsEmpty]: Start isEmpty. Operand 25653 states and 46525 transitions. [2021-11-07 01:56:20,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-07 01:56:20,786 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:56:20,786 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:56:20,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:21,016 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2021-11-07 01:56:21,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:56:21,209 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:56:21,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:56:21,209 INFO L85 PathProgramCache]: Analyzing trace with hash 466366838, now seen corresponding path program 1 times [2021-11-07 01:56:21,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:56:21,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1308926984] [2021-11-07 01:56:21,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:21,210 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:56:21,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:56:21,211 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:56:21,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-07 01:56:22,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:22,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:56:22,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:22,679 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 01:56:22,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:23,014 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 01:56:23,014 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:23,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1308926984] [2021-11-07 01:56:23,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1308926984] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:56:23,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1016086024] [2021-11-07 01:56:23,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:23,015 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:56:23,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:56:23,015 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:56:23,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-07 01:56:24,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:24,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:56:24,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:24,944 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 01:56:24,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:25,253 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 01:56:25,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1016086024] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:56:25,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:56:25,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 11 [2021-11-07 01:56:25,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745276834] [2021-11-07 01:56:25,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:56:25,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:56:25,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:56:25,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:56:25,255 INFO L87 Difference]: Start difference. First operand 25653 states and 46525 transitions. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 01:56:28,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:56:28,047 INFO L93 Difference]: Finished difference Result 52446 states and 94961 transitions. [2021-11-07 01:56:28,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:56:28,047 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 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 117 [2021-11-07 01:56:28,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:56:28,133 INFO L225 Difference]: With dead ends: 52446 [2021-11-07 01:56:28,133 INFO L226 Difference]: Without dead ends: 51589 [2021-11-07 01:56:28,144 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 455 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 01:56:28,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51589 states. [2021-11-07 01:56:30,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51589 to 50628. [2021-11-07 01:56:30,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50628 states, 50624 states have (on average 1.8150877054361567) internal successors, (91887), 50627 states have internal predecessors, (91887), 0 states have call successors, (0), 0 states 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 01:56:31,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50628 states to 50628 states and 91887 transitions. [2021-11-07 01:56:31,248 INFO L78 Accepts]: Start accepts. Automaton has 50628 states and 91887 transitions. Word has length 117 [2021-11-07 01:56:31,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:56:31,248 INFO L470 AbstractCegarLoop]: Abstraction has 50628 states and 91887 transitions. [2021-11-07 01:56:31,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 01:56:31,248 INFO L276 IsEmpty]: Start isEmpty. Operand 50628 states and 91887 transitions. [2021-11-07 01:56:31,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-07 01:56:31,311 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:56:31,311 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:56:31,317 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2021-11-07 01:56:31,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:31,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:56:31,715 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:56:31,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:56:31,716 INFO L85 PathProgramCache]: Analyzing trace with hash 635797776, now seen corresponding path program 1 times [2021-11-07 01:56:31,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:56:31,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [696855482] [2021-11-07 01:56:31,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:31,718 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:56:31,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:56:31,719 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:56:31,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-07 01:56:33,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:33,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:56:33,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:33,417 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 01:56:33,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:33,760 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 01:56:33,761 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:33,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [696855482] [2021-11-07 01:56:33,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [696855482] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:56:33,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1935257717] [2021-11-07 01:56:33,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:33,762 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:56:33,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:56:33,766 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:56:33,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-07 01:56:35,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:35,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:56:35,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:35,967 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 01:56:35,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:36,313 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 01:56:36,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1935257717] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:56:36,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:56:36,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 12 [2021-11-07 01:56:36,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662231475] [2021-11-07 01:56:36,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:56:36,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:56:36,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:56:36,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:56:36,316 INFO L87 Difference]: Start difference. First operand 50628 states and 91887 transitions. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:41,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:56:41,428 INFO L93 Difference]: Finished difference Result 52270 states and 94682 transitions. [2021-11-07 01:56:41,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:56:41,429 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-11-07 01:56:41,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:56:41,514 INFO L225 Difference]: With dead ends: 52270 [2021-11-07 01:56:41,514 INFO L226 Difference]: Without dead ends: 50509 [2021-11-07 01:56:41,525 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 458 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:56:41,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50509 states. [2021-11-07 01:56:44,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50509 to 50152. [2021-11-07 01:56:44,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50152 states, 50148 states have (on average 1.8158052165589853) internal successors, (91059), 50151 states have internal predecessors, (91059), 0 states have call successors, (0), 0 states 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 01:56:44,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50152 states to 50152 states and 91059 transitions. [2021-11-07 01:56:44,880 INFO L78 Accepts]: Start accepts. Automaton has 50152 states and 91059 transitions. Word has length 118 [2021-11-07 01:56:44,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:56:44,881 INFO L470 AbstractCegarLoop]: Abstraction has 50152 states and 91059 transitions. [2021-11-07 01:56:44,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:44,881 INFO L276 IsEmpty]: Start isEmpty. Operand 50152 states and 91059 transitions. [2021-11-07 01:56:44,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-07 01:56:44,927 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:56:44,927 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:56:44,943 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-11-07 01:56:45,133 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2021-11-07 01:56:45,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:56:45,329 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:56:45,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:56:45,329 INFO L85 PathProgramCache]: Analyzing trace with hash -489571688, now seen corresponding path program 1 times [2021-11-07 01:56:45,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:56:45,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [312618521] [2021-11-07 01:56:45,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:45,331 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:56:45,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:56:45,332 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:56:45,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-07 01:56:46,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:46,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:56:46,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:47,004 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 01:56:47,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:47,309 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 01:56:47,309 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:47,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [312618521] [2021-11-07 01:56:47,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [312618521] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:56:47,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1246327595] [2021-11-07 01:56:47,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:47,310 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:56:47,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:56:47,311 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:56:47,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-07 01:56:49,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:49,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 01:56:49,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:49,560 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 01:56:49,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:49,912 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 01:56:49,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1246327595] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:56:49,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:56:49,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 14 [2021-11-07 01:56:49,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935870793] [2021-11-07 01:56:49,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:56:49,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:56:49,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:56:49,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:56:49,914 INFO L87 Difference]: Start difference. First operand 50152 states and 91059 transitions. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:55,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:56:55,451 INFO L93 Difference]: Finished difference Result 51810 states and 93834 transitions. [2021-11-07 01:56:55,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:56:55,451 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-11-07 01:56:55,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:56:55,534 INFO L225 Difference]: With dead ends: 51810 [2021-11-07 01:56:55,534 INFO L226 Difference]: Without dead ends: 50618 [2021-11-07 01:56:55,543 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 456 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:56:55,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50618 states. [2021-11-07 01:56:58,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50618 to 50104. [2021-11-07 01:56:58,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50104 states, 50100 states have (on average 1.8153892215568863) internal successors, (90951), 50103 states have internal predecessors, (90951), 0 states have call successors, (0), 0 states 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 01:56:58,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50104 states to 50104 states and 90951 transitions. [2021-11-07 01:56:58,409 INFO L78 Accepts]: Start accepts. Automaton has 50104 states and 90951 transitions. Word has length 118 [2021-11-07 01:56:58,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:56:58,409 INFO L470 AbstractCegarLoop]: Abstraction has 50104 states and 90951 transitions. [2021-11-07 01:56:58,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:58,410 INFO L276 IsEmpty]: Start isEmpty. Operand 50104 states and 90951 transitions. [2021-11-07 01:56:58,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-07 01:56:58,458 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:56:58,458 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:56:58,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:58,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:58,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:56:58,859 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:56:58,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:56:58,859 INFO L85 PathProgramCache]: Analyzing trace with hash -815811728, now seen corresponding path program 1 times [2021-11-07 01:56:58,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:56:58,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [858807382] [2021-11-07 01:56:58,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:58,860 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:56:58,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:56:58,864 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:56:58,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-07 01:57:00,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:00,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:57:00,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:00,649 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 01:57:00,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:01,171 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 01:57:01,171 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:01,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [858807382] [2021-11-07 01:57:01,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [858807382] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:57:01,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [252359274] [2021-11-07 01:57:01,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:01,172 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:57:01,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:57:01,173 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:57:01,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-07 01:57:03,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:03,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:57:03,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:03,969 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 01:57:03,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:04,433 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 01:57:04,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [252359274] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:04,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:57:04,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 01:57:04,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541776005] [2021-11-07 01:57:04,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:57:04,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:04,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:57:04,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:57:04,436 INFO L87 Difference]: Start difference. First operand 50104 states and 90951 transitions. Second operand has 16 states, 16 states have (on average 10.6875) internal successors, (171), 15 states have internal predecessors, (171), 0 states have call successors, (0), 0 states 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 01:57:26,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:26,519 INFO L93 Difference]: Finished difference Result 107486 states and 193939 transitions. [2021-11-07 01:57:26,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 01:57:26,519 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 10.6875) internal successors, (171), 15 states have internal predecessors, (171), 0 states have call successors, (0), 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 118 [2021-11-07 01:57:26,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:26,699 INFO L225 Difference]: With dead ends: 107486 [2021-11-07 01:57:26,699 INFO L226 Difference]: Without dead ends: 106342 [2021-11-07 01:57:26,713 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=391, Invalid=1249, Unknown=0, NotChecked=0, Total=1640 [2021-11-07 01:57:26,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106342 states. [2021-11-07 01:57:32,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106342 to 99840. [2021-11-07 01:57:32,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99840 states, 99836 states have (on average 1.815627629312072) internal successors, (181265), 99839 states have internal predecessors, (181265), 0 states have call successors, (0), 0 states 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 01:57:32,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99840 states to 99840 states and 181265 transitions. [2021-11-07 01:57:32,822 INFO L78 Accepts]: Start accepts. Automaton has 99840 states and 181265 transitions. Word has length 118 [2021-11-07 01:57:32,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:32,822 INFO L470 AbstractCegarLoop]: Abstraction has 99840 states and 181265 transitions. [2021-11-07 01:57:32,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 10.6875) internal successors, (171), 15 states have internal predecessors, (171), 0 states have call successors, (0), 0 states 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 01:57:32,822 INFO L276 IsEmpty]: Start isEmpty. Operand 99840 states and 181265 transitions. [2021-11-07 01:57:33,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-07 01:57:33,204 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:33,205 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:57:33,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:33,413 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2021-11-07 01:57:33,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:57:33,607 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:57:33,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:33,608 INFO L85 PathProgramCache]: Analyzing trace with hash 60207278, now seen corresponding path program 1 times [2021-11-07 01:57:33,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:33,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [477773272] [2021-11-07 01:57:33,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:33,608 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:33,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:33,610 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:33,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-07 01:57:35,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:35,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:57:35,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:35,469 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 01:57:35,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:35,776 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 01:57:35,777 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:35,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [477773272] [2021-11-07 01:57:35,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [477773272] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:57:35,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [457946605] [2021-11-07 01:57:35,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:35,777 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:57:35,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:57:35,783 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:57:35,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479e1ff8-8a9f-4b2d-a7a6-3efcf1906209/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-07 01:57:37,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:37,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 01:57:37,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:38,338 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 01:57:38,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:38,772 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 01:57:38,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [457946605] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:38,772 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:57:38,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 20 [2021-11-07 01:57:38,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594631355] [2021-11-07 01:57:38,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 01:57:38,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:38,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 01:57:38,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:57:38,774 INFO L87 Difference]: Start difference. First operand 99840 states and 181265 transitions. Second operand has 14 states, 14 states have (on average 12.642857142857142) internal successors, (177), 14 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)