./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product27.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_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/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_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/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_17b12dcf-7841-41dc-bd46-dccaf08db9b5/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 11bb1f05736dca729c358ce9b340534ff3d0ef3cd2b5d7b8f4dea43dade9112f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:23:42,393 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:23:42,396 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:23:42,431 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:23:42,431 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:23:42,432 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:23:42,434 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:23:42,436 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:23:42,438 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:23:42,439 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:23:42,441 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:23:42,442 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:23:42,442 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:23:42,444 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:23:42,445 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:23:42,446 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:23:42,447 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:23:42,448 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:23:42,450 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:23:42,453 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:23:42,455 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:23:42,456 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:23:42,457 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:23:42,458 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:23:42,462 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:23:42,462 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:23:42,462 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:23:42,464 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:23:42,464 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:23:42,465 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:23:42,465 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:23:42,466 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:23:42,467 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:23:42,468 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:23:42,469 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:23:42,470 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:23:42,470 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:23:42,471 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:23:42,471 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:23:42,472 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:23:42,473 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:23:42,474 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:23:42,499 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:23:42,499 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:23:42,500 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:23:42,500 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:23:42,501 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:23:42,501 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:23:42,501 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:23:42,501 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:23:42,501 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:23:42,502 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:23:42,502 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:23:42,502 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:23:42,502 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:23:42,502 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:23:42,503 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:23:42,503 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:23:42,503 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:23:42,504 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:23:42,504 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:23:42,504 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:23:42,504 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:23:42,504 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:23:42,505 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:23:42,505 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:23:42,505 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:23:42,505 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:23:42,505 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:23:42,505 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:23:42,506 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:23:42,506 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:23:42,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:23:42,506 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:23:42,506 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:23:42,507 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:23:42,507 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:23:42,507 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:23:42,507 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:23:42,507 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:23:42,508 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:23:42,508 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_17b12dcf-7841-41dc-bd46-dccaf08db9b5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 11bb1f05736dca729c358ce9b340534ff3d0ef3cd2b5d7b8f4dea43dade9112f [2021-11-07 01:23:42,790 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:23:42,813 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:23:42,816 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:23:42,817 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:23:42,818 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:23:42,819 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c [2021-11-07 01:23:42,885 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/data/d5ca79c67/cbc6f879e0cb408e950413bde04f7a1b/FLAG4ccb6d268 [2021-11-07 01:23:43,473 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:23:43,477 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c [2021-11-07 01:23:43,513 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/data/d5ca79c67/cbc6f879e0cb408e950413bde04f7a1b/FLAG4ccb6d268 [2021-11-07 01:23:43,912 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/data/d5ca79c67/cbc6f879e0cb408e950413bde04f7a1b [2021-11-07 01:23:43,917 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:23:43,919 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:23:43,921 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:23:43,922 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:23:43,925 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:23:43,926 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:23:43" (1/1) ... [2021-11-07 01:23:43,928 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3beb7db9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:43, skipping insertion in model container [2021-11-07 01:23:43,928 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:23:43" (1/1) ... [2021-11-07 01:23:43,937 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:23:44,037 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:23:44,510 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_17b12dcf-7841-41dc-bd46-dccaf08db9b5/sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c[66437,66450] [2021-11-07 01:23:44,522 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:23:44,533 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 01:23:44,533 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@792c1ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:44, skipping insertion in model container [2021-11-07 01:23:44,534 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:23:44,534 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:23:44,536 INFO L168 Benchmark]: Toolchain (without parser) took 615.65 ms. Allocated memory is still 102.8 MB. Free memory was 57.9 MB in the beginning and 62.4 MB in the end (delta: -4.5 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. [2021-11-07 01:23:44,537 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 102.8 MB. Free memory is still 77.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:23:44,537 INFO L168 Benchmark]: CACSL2BoogieTranslator took 612.54 ms. Allocated memory is still 102.8 MB. Free memory was 57.6 MB in the beginning and 62.4 MB in the end (delta: -4.7 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. [2021-11-07 01:23:44,539 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 102.8 MB. Free memory is still 77.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 612.54 ms. Allocated memory is still 102.8 MB. Free memory was 57.6 MB in the beginning and 62.4 MB in the end (delta: -4.7 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 77]: 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_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/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_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/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_17b12dcf-7841-41dc-bd46-dccaf08db9b5/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 11bb1f05736dca729c358ce9b340534ff3d0ef3cd2b5d7b8f4dea43dade9112f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:23:46,615 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:23:46,617 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:23:46,666 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:23:46,666 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:23:46,668 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:23:46,669 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:23:46,672 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:23:46,674 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:23:46,675 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:23:46,676 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:23:46,677 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:23:46,678 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:23:46,679 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:23:46,681 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:23:46,682 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:23:46,683 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:23:46,684 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:23:46,686 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:23:46,691 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:23:46,693 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:23:46,695 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:23:46,697 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:23:46,700 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:23:46,711 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:23:46,711 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:23:46,712 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:23:46,713 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:23:46,713 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:23:46,714 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:23:46,715 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:23:46,716 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:23:46,716 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:23:46,717 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:23:46,718 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:23:46,719 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:23:46,719 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:23:46,720 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:23:46,720 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:23:46,727 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:23:46,727 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:23:46,732 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:23:46,782 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:23:46,782 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:23:46,783 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:23:46,784 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:23:46,784 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:23:46,784 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:23:46,784 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:23:46,784 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:23:46,785 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:23:46,786 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:23:46,787 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:23:46,787 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:23:46,787 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:23:46,787 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:23:46,788 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:23:46,788 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:23:46,788 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:23:46,788 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:23:46,788 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:23:46,789 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:23:46,789 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:23:46,789 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:23:46,789 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:23:46,789 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:23:46,790 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:23:46,790 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:23:46,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:23:46,790 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:23:46,790 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:23:46,791 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:23:46,791 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:23:46,791 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:23:46,791 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:23:46,791 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:23:46,792 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:23:46,792 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_17b12dcf-7841-41dc-bd46-dccaf08db9b5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 11bb1f05736dca729c358ce9b340534ff3d0ef3cd2b5d7b8f4dea43dade9112f [2021-11-07 01:23:47,171 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:23:47,191 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:23:47,194 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:23:47,195 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:23:47,196 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:23:47,197 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c [2021-11-07 01:23:47,264 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/data/e65658c7d/f189ddfe77174149b0da128036dba28d/FLAG529b79e9b [2021-11-07 01:23:47,953 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:23:47,954 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c [2021-11-07 01:23:47,987 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/data/e65658c7d/f189ddfe77174149b0da128036dba28d/FLAG529b79e9b [2021-11-07 01:23:48,117 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/data/e65658c7d/f189ddfe77174149b0da128036dba28d [2021-11-07 01:23:48,120 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:23:48,124 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:23:48,125 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:23:48,126 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:23:48,129 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:23:48,130 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:23:48" (1/1) ... [2021-11-07 01:23:48,131 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@360eb91f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:48, skipping insertion in model container [2021-11-07 01:23:48,131 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:23:48" (1/1) ... [2021-11-07 01:23:48,139 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:23:48,228 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:23:48,870 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_17b12dcf-7841-41dc-bd46-dccaf08db9b5/sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c[66437,66450] [2021-11-07 01:23:48,883 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:23:48,900 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:23:48,922 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:23:49,077 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_17b12dcf-7841-41dc-bd46-dccaf08db9b5/sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c[66437,66450] [2021-11-07 01:23:49,083 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:23:49,088 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:23:49,168 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_17b12dcf-7841-41dc-bd46-dccaf08db9b5/sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c[66437,66450] [2021-11-07 01:23:49,181 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:23:49,220 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:23:49,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:49 WrapperNode [2021-11-07 01:23:49,220 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:23:49,222 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:23:49,222 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:23:49,222 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:23:49,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:49" (1/1) ... [2021-11-07 01:23:49,294 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:49" (1/1) ... [2021-11-07 01:23:49,515 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:23:49,516 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:23:49,516 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:23:49,517 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:23:49,525 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:49" (1/1) ... [2021-11-07 01:23:49,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:49" (1/1) ... [2021-11-07 01:23:49,547 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:49" (1/1) ... [2021-11-07 01:23:49,548 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:49" (1/1) ... [2021-11-07 01:23:49,631 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:49" (1/1) ... [2021-11-07 01:23:49,737 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:49" (1/1) ... [2021-11-07 01:23:49,752 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:49" (1/1) ... [2021-11-07 01:23:49,780 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:23:49,782 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:23:49,784 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:23:49,784 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:23:49,785 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:49" (1/1) ... [2021-11-07 01:23:49,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:23:49,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:23:49,822 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:23:49,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:23:49,873 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:23:49,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:23:49,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:23:49,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:23:58,252 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:23:58,253 INFO L299 CfgBuilder]: Removed 649 assume(true) statements. [2021-11-07 01:23:58,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:23:58 BoogieIcfgContainer [2021-11-07 01:23:58,260 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:23:58,263 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:23:58,264 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:23:58,266 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:23:58,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:23:48" (1/3) ... [2021-11-07 01:23:58,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4589e809 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:23:58, skipping insertion in model container [2021-11-07 01:23:58,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:49" (2/3) ... [2021-11-07 01:23:58,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4589e809 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:23:58, skipping insertion in model container [2021-11-07 01:23:58,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:23:58" (3/3) ... [2021-11-07 01:23:58,270 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product27.cil.c [2021-11-07 01:23:58,278 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:23:58,278 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 01:23:58,336 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:23:58,342 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 01:23:58,342 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 01:23:58,403 INFO L276 IsEmpty]: Start isEmpty. Operand has 2604 states, 2598 states have (on average 1.8849114703618168) internal successors, (4897), 2603 states have internal predecessors, (4897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:23:58,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-07 01:23:58,421 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:23:58,422 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] [2021-11-07 01:23:58,423 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:23:58,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:23:58,428 INFO L85 PathProgramCache]: Analyzing trace with hash -2128793174, now seen corresponding path program 1 times [2021-11-07 01:23:58,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:23:58,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1358971912] [2021-11-07 01:23:58,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:23:58,442 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:23:58,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:23:58,443 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:23:58,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:23:58,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:23:58,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:23:58,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:23:58,977 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 01:23:58,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:23:59,058 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 01:23:59,059 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:23:59,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1358971912] [2021-11-07 01:23:59,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1358971912] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:23:59,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:23:59,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:23:59,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960068024] [2021-11-07 01:23:59,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:23:59,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:23:59,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:23:59,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:23:59,095 INFO L87 Difference]: Start difference. First operand has 2604 states, 2598 states have (on average 1.8849114703618168) internal successors, (4897), 2603 states have internal predecessors, (4897), 0 states have call successors, (0), 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 21.5) internal successors, (43), 2 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:23:59,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:23:59,214 INFO L93 Difference]: Finished difference Result 2623 states and 4920 transitions. [2021-11-07 01:23:59,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:23:59,215 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-11-07 01:23:59,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:23:59,260 INFO L225 Difference]: With dead ends: 2623 [2021-11-07 01:23:59,261 INFO L226 Difference]: Without dead ends: 2600 [2021-11-07 01:23:59,266 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 84 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 01:23:59,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2600 states. [2021-11-07 01:23:59,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2600 to 2600. [2021-11-07 01:23:59,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2600 states, 2595 states have (on average 1.882466281310212) internal successors, (4885), 2599 states have internal predecessors, (4885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:23:59,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2600 states to 2600 states and 4885 transitions. [2021-11-07 01:23:59,502 INFO L78 Accepts]: Start accepts. Automaton has 2600 states and 4885 transitions. Word has length 43 [2021-11-07 01:23:59,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:23:59,504 INFO L470 AbstractCegarLoop]: Abstraction has 2600 states and 4885 transitions. [2021-11-07 01:23:59,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:23:59,505 INFO L276 IsEmpty]: Start isEmpty. Operand 2600 states and 4885 transitions. [2021-11-07 01:23:59,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 01:23:59,510 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:23:59,510 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:23:59,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:23:59,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:23:59,726 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:23:59,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:23:59,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1553139559, now seen corresponding path program 1 times [2021-11-07 01:23:59,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:23:59,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2145464696] [2021-11-07 01:23:59,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:23:59,729 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:23:59,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:23:59,730 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:23:59,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:24:00,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:00,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:24:00,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:00,252 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 01:24:00,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:00,392 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 01:24:00,392 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:00,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2145464696] [2021-11-07 01:24:00,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2145464696] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:00,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:00,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:24:00,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303611216] [2021-11-07 01:24:00,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:24:00,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:00,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:24:00,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:24:00,397 INFO L87 Difference]: Start difference. First operand 2600 states and 4885 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:00,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:00,550 INFO L93 Difference]: Finished difference Result 5187 states and 9751 transitions. [2021-11-07 01:24:00,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:24:00,551 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-07 01:24:00,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:00,569 INFO L225 Difference]: With dead ends: 5187 [2021-11-07 01:24:00,570 INFO L226 Difference]: Without dead ends: 2600 [2021-11-07 01:24:00,576 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 86 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 01:24:00,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2600 states. [2021-11-07 01:24:00,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2600 to 2600. [2021-11-07 01:24:00,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2600 states, 2595 states have (on average 1.8801541425818882) internal successors, (4879), 2599 states have internal predecessors, (4879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:00,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2600 states to 2600 states and 4879 transitions. [2021-11-07 01:24:00,730 INFO L78 Accepts]: Start accepts. Automaton has 2600 states and 4879 transitions. Word has length 45 [2021-11-07 01:24:00,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:00,731 INFO L470 AbstractCegarLoop]: Abstraction has 2600 states and 4879 transitions. [2021-11-07 01:24:00,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:00,731 INFO L276 IsEmpty]: Start isEmpty. Operand 2600 states and 4879 transitions. [2021-11-07 01:24:00,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 01:24:00,736 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:00,741 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] [2021-11-07 01:24:00,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:00,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:24:00,962 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:24:00,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:00,964 INFO L85 PathProgramCache]: Analyzing trace with hash 991261519, now seen corresponding path program 1 times [2021-11-07 01:24:00,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:00,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2110210283] [2021-11-07 01:24:00,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:00,967 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:00,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:00,968 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:01,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:24:01,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:01,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:24:01,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:01,484 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 01:24:01,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:01,660 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 01:24:01,661 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:01,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2110210283] [2021-11-07 01:24:01,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2110210283] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:01,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:01,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:24:01,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949282958] [2021-11-07 01:24:01,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:24:01,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:01,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:24:01,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:24:01,664 INFO L87 Difference]: Start difference. First operand 2600 states and 4879 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:01,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:01,863 INFO L93 Difference]: Finished difference Result 5151 states and 9674 transitions. [2021-11-07 01:24:01,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:24:01,864 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 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 50 [2021-11-07 01:24:01,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:01,882 INFO L225 Difference]: With dead ends: 5151 [2021-11-07 01:24:01,882 INFO L226 Difference]: Without dead ends: 2573 [2021-11-07 01:24:01,887 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:24:01,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2573 states. [2021-11-07 01:24:02,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2573 to 2573. [2021-11-07 01:24:02,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2573 states, 2568 states have (on average 1.8781152647975077) internal successors, (4823), 2572 states have internal predecessors, (4823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:02,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2573 states to 2573 states and 4823 transitions. [2021-11-07 01:24:02,066 INFO L78 Accepts]: Start accepts. Automaton has 2573 states and 4823 transitions. Word has length 50 [2021-11-07 01:24:02,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:02,067 INFO L470 AbstractCegarLoop]: Abstraction has 2573 states and 4823 transitions. [2021-11-07 01:24:02,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:02,068 INFO L276 IsEmpty]: Start isEmpty. Operand 2573 states and 4823 transitions. [2021-11-07 01:24:02,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 01:24:02,071 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:02,071 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 01:24:02,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:02,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:24:02,285 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:24:02,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:02,286 INFO L85 PathProgramCache]: Analyzing trace with hash -681367187, now seen corresponding path program 1 times [2021-11-07 01:24:02,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:02,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2076804502] [2021-11-07 01:24:02,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:02,287 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:02,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:02,289 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:02,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:24:02,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:02,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:24:02,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:02,851 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 01:24:02,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:02,992 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 01:24:02,992 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:02,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2076804502] [2021-11-07 01:24:02,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2076804502] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:02,993 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:02,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:24:02,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313034965] [2021-11-07 01:24:02,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:24:02,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:02,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:24:02,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:24:02,995 INFO L87 Difference]: Start difference. First operand 2573 states and 4823 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 01:24:03,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:03,155 INFO L93 Difference]: Finished difference Result 5124 states and 9618 transitions. [2021-11-07 01:24:03,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:24:03,155 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 51 [2021-11-07 01:24:03,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:03,173 INFO L225 Difference]: With dead ends: 5124 [2021-11-07 01:24:03,173 INFO L226 Difference]: Without dead ends: 2573 [2021-11-07 01:24:03,177 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 98 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 01:24:03,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2573 states. [2021-11-07 01:24:03,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2573 to 2573. [2021-11-07 01:24:03,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2573 states, 2568 states have (on average 1.875778816199377) internal successors, (4817), 2572 states have internal predecessors, (4817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:03,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2573 states to 2573 states and 4817 transitions. [2021-11-07 01:24:03,320 INFO L78 Accepts]: Start accepts. Automaton has 2573 states and 4817 transitions. Word has length 51 [2021-11-07 01:24:03,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:03,320 INFO L470 AbstractCegarLoop]: Abstraction has 2573 states and 4817 transitions. [2021-11-07 01:24:03,320 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 01:24:03,321 INFO L276 IsEmpty]: Start isEmpty. Operand 2573 states and 4817 transitions. [2021-11-07 01:24:03,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 01:24:03,323 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:03,324 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:24:03,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:03,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:24:03,538 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:24:03,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:03,538 INFO L85 PathProgramCache]: Analyzing trace with hash -946079684, now seen corresponding path program 1 times [2021-11-07 01:24:03,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:03,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2111612764] [2021-11-07 01:24:03,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:03,539 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:03,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:03,540 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:03,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:24:03,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:03,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:24:03,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:04,136 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 01:24:04,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:04,334 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 01:24:04,334 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:04,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2111612764] [2021-11-07 01:24:04,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2111612764] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:04,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:04,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:24:04,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482995820] [2021-11-07 01:24:04,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:24:04,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:04,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:24:04,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:24:04,337 INFO L87 Difference]: Start difference. First operand 2573 states and 4817 transitions. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 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 01:24:04,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:04,574 INFO L93 Difference]: Finished difference Result 5118 states and 9601 transitions. [2021-11-07 01:24:04,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:24:04,575 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 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 56 [2021-11-07 01:24:04,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:04,593 INFO L225 Difference]: With dead ends: 5118 [2021-11-07 01:24:04,593 INFO L226 Difference]: Without dead ends: 2570 [2021-11-07 01:24:04,619 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:24:04,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2570 states. [2021-11-07 01:24:04,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2570 to 2570. [2021-11-07 01:24:04,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2570 states, 2565 states have (on average 1.8748538011695906) internal successors, (4809), 2569 states have internal predecessors, (4809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:04,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2570 states to 2570 states and 4809 transitions. [2021-11-07 01:24:04,729 INFO L78 Accepts]: Start accepts. Automaton has 2570 states and 4809 transitions. Word has length 56 [2021-11-07 01:24:04,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:04,729 INFO L470 AbstractCegarLoop]: Abstraction has 2570 states and 4809 transitions. [2021-11-07 01:24:04,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 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 01:24:04,730 INFO L276 IsEmpty]: Start isEmpty. Operand 2570 states and 4809 transitions. [2021-11-07 01:24:04,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 01:24:04,732 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:04,732 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] [2021-11-07 01:24:04,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:04,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:24:04,948 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:24:04,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:04,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1011030124, now seen corresponding path program 1 times [2021-11-07 01:24:04,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:04,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [573092104] [2021-11-07 01:24:04,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:04,950 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:04,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:04,953 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:04,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:24:05,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:05,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:24:05,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:05,603 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 01:24:05,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:05,791 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 01:24:05,791 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:05,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [573092104] [2021-11-07 01:24:05,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [573092104] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:05,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:05,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 01:24:05,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568060648] [2021-11-07 01:24:05,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:24:05,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:05,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:24:05,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:24:05,793 INFO L87 Difference]: Start difference. First operand 2570 states and 4809 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:07,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:07,422 INFO L93 Difference]: Finished difference Result 9436 states and 17715 transitions. [2021-11-07 01:24:07,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:24:07,424 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 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 57 [2021-11-07 01:24:07,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:07,502 INFO L225 Difference]: With dead ends: 9436 [2021-11-07 01:24:07,502 INFO L226 Difference]: Without dead ends: 6897 [2021-11-07 01:24:07,506 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 108 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 01:24:07,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6897 states. [2021-11-07 01:24:07,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6897 to 2570. [2021-11-07 01:24:07,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2570 states, 2565 states have (on average 1.8350877192982455) internal successors, (4707), 2569 states have internal predecessors, (4707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:07,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2570 states to 2570 states and 4707 transitions. [2021-11-07 01:24:07,716 INFO L78 Accepts]: Start accepts. Automaton has 2570 states and 4707 transitions. Word has length 57 [2021-11-07 01:24:07,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:07,718 INFO L470 AbstractCegarLoop]: Abstraction has 2570 states and 4707 transitions. [2021-11-07 01:24:07,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:07,719 INFO L276 IsEmpty]: Start isEmpty. Operand 2570 states and 4707 transitions. [2021-11-07 01:24:07,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:24:07,722 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:07,722 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] [2021-11-07 01:24:07,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:07,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:24:07,936 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:24:07,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:07,937 INFO L85 PathProgramCache]: Analyzing trace with hash -907708416, now seen corresponding path program 1 times [2021-11-07 01:24:07,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:07,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2062096827] [2021-11-07 01:24:07,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:07,938 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:07,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:07,939 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:07,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:24:08,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:08,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:24:08,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:08,599 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 01:24:08,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:08,820 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 01:24:08,820 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:08,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2062096827] [2021-11-07 01:24:08,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2062096827] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:08,820 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:08,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:24:08,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421347839] [2021-11-07 01:24:08,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:24:08,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:08,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:24:08,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:24:08,822 INFO L87 Difference]: Start difference. First operand 2570 states and 4707 transitions. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:09,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:09,954 INFO L93 Difference]: Finished difference Result 7229 states and 13368 transitions. [2021-11-07 01:24:09,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:24:09,955 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 01:24:09,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:09,997 INFO L225 Difference]: With dead ends: 7229 [2021-11-07 01:24:09,998 INFO L226 Difference]: Without dead ends: 4708 [2021-11-07 01:24:10,002 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:24:10,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4708 states. [2021-11-07 01:24:10,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4708 to 2536. [2021-11-07 01:24:10,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2536 states, 2531 states have (on average 1.8352429869616753) internal successors, (4645), 2535 states have internal predecessors, (4645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:10,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2536 states to 2536 states and 4645 transitions. [2021-11-07 01:24:10,151 INFO L78 Accepts]: Start accepts. Automaton has 2536 states and 4645 transitions. Word has length 65 [2021-11-07 01:24:10,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:10,151 INFO L470 AbstractCegarLoop]: Abstraction has 2536 states and 4645 transitions. [2021-11-07 01:24:10,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:10,152 INFO L276 IsEmpty]: Start isEmpty. Operand 2536 states and 4645 transitions. [2021-11-07 01:24:10,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:24:10,154 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:10,154 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 01:24:10,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:10,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:24:10,368 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:24:10,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:10,369 INFO L85 PathProgramCache]: Analyzing trace with hash -723633696, now seen corresponding path program 1 times [2021-11-07 01:24:10,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:10,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [961246350] [2021-11-07 01:24:10,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:10,370 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:10,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:10,375 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:10,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:24:10,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:10,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:24:10,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:11,064 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 01:24:11,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:11,288 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 01:24:11,288 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:11,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [961246350] [2021-11-07 01:24:11,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [961246350] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:11,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:11,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:24:11,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028301821] [2021-11-07 01:24:11,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:24:11,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:11,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:24:11,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:24:11,313 INFO L87 Difference]: Start difference. First operand 2536 states and 4645 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 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 01:24:13,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:13,156 INFO L93 Difference]: Finished difference Result 10050 states and 18539 transitions. [2021-11-07 01:24:13,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:24:13,157 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 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 01:24:13,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:13,176 INFO L225 Difference]: With dead ends: 10050 [2021-11-07 01:24:13,176 INFO L226 Difference]: Without dead ends: 7562 [2021-11-07 01:24:13,181 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:24:13,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7562 states. [2021-11-07 01:24:13,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7562 to 2540. [2021-11-07 01:24:13,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2540 states, 2535 states have (on average 1.8339250493096646) internal successors, (4649), 2539 states have internal predecessors, (4649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:13,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2540 states to 2540 states and 4649 transitions. [2021-11-07 01:24:13,347 INFO L78 Accepts]: Start accepts. Automaton has 2540 states and 4649 transitions. Word has length 67 [2021-11-07 01:24:13,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:13,348 INFO L470 AbstractCegarLoop]: Abstraction has 2540 states and 4649 transitions. [2021-11-07 01:24:13,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 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 01:24:13,348 INFO L276 IsEmpty]: Start isEmpty. Operand 2540 states and 4649 transitions. [2021-11-07 01:24:13,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:24:13,350 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:13,350 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 01:24:13,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:13,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:24:13,566 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:24:13,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:13,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1917040853, now seen corresponding path program 1 times [2021-11-07 01:24:13,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:13,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1062478534] [2021-11-07 01:24:13,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:13,567 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:13,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:13,567 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:13,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:24:13,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:14,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:24:14,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:14,184 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 01:24:14,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:14,360 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 01:24:14,360 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:14,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1062478534] [2021-11-07 01:24:14,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1062478534] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:14,361 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:14,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:24:14,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98774991] [2021-11-07 01:24:14,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:24:14,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:14,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:24:14,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:24:14,362 INFO L87 Difference]: Start difference. First operand 2540 states and 4649 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 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 01:24:18,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:18,352 INFO L93 Difference]: Finished difference Result 6319 states and 11535 transitions. [2021-11-07 01:24:18,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:24:18,353 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 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 68 [2021-11-07 01:24:18,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:18,365 INFO L225 Difference]: With dead ends: 6319 [2021-11-07 01:24:18,366 INFO L226 Difference]: Without dead ends: 4849 [2021-11-07 01:24:18,369 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:24:18,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4849 states. [2021-11-07 01:24:18,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4849 to 4716. [2021-11-07 01:24:18,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4716 states, 4711 states have (on average 1.8410104011887072) internal successors, (8673), 4715 states have internal predecessors, (8673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:18,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4716 states to 4716 states and 8673 transitions. [2021-11-07 01:24:18,646 INFO L78 Accepts]: Start accepts. Automaton has 4716 states and 8673 transitions. Word has length 68 [2021-11-07 01:24:18,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:18,647 INFO L470 AbstractCegarLoop]: Abstraction has 4716 states and 8673 transitions. [2021-11-07 01:24:18,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 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 01:24:18,647 INFO L276 IsEmpty]: Start isEmpty. Operand 4716 states and 8673 transitions. [2021-11-07 01:24:18,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:24:18,653 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:18,653 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 01:24:18,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:18,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:24:18,877 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:24:18,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:18,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1330234839, now seen corresponding path program 1 times [2021-11-07 01:24:18,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:18,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2143658745] [2021-11-07 01:24:18,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:18,879 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:18,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:18,880 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:18,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:24:19,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:19,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:24:19,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:19,532 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 01:24:19,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:19,746 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 01:24:19,747 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:19,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2143658745] [2021-11-07 01:24:19,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2143658745] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:19,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:19,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:24:19,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940720402] [2021-11-07 01:24:19,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:24:19,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:19,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:24:19,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:24:19,749 INFO L87 Difference]: Start difference. First operand 4716 states and 8673 transitions. Second operand has 4 states, 4 states have (on average 17.0) 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 01:24:21,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:21,016 INFO L93 Difference]: Finished difference Result 8479 states and 15538 transitions. [2021-11-07 01:24:21,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:24:21,017 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) 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 01:24:21,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:21,028 INFO L225 Difference]: With dead ends: 8479 [2021-11-07 01:24:21,028 INFO L226 Difference]: Without dead ends: 4836 [2021-11-07 01:24:21,032 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 132 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 01:24:21,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4836 states. [2021-11-07 01:24:21,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4836 to 4627. [2021-11-07 01:24:21,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4627 states, 4622 states have (on average 1.8256166161834704) internal successors, (8438), 4626 states have internal predecessors, (8438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:21,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4627 states to 4627 states and 8438 transitions. [2021-11-07 01:24:21,249 INFO L78 Accepts]: Start accepts. Automaton has 4627 states and 8438 transitions. Word has length 68 [2021-11-07 01:24:21,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:21,250 INFO L470 AbstractCegarLoop]: Abstraction has 4627 states and 8438 transitions. [2021-11-07 01:24:21,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) 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 01:24:21,250 INFO L276 IsEmpty]: Start isEmpty. Operand 4627 states and 8438 transitions. [2021-11-07 01:24:21,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:24:21,256 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:21,256 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 01:24:21,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:21,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:24:21,474 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:24:21,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:21,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1897049101, now seen corresponding path program 1 times [2021-11-07 01:24:21,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:21,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1130835647] [2021-11-07 01:24:21,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:21,475 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:21,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:21,477 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:21,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:24:21,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:21,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:24:21,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:22,214 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 01:24:22,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:22,413 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 01:24:22,413 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:22,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1130835647] [2021-11-07 01:24:22,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1130835647] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:22,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:22,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:24:22,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232657369] [2021-11-07 01:24:22,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:24:22,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:22,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:24:22,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:24:22,415 INFO L87 Difference]: Start difference. First operand 4627 states and 8438 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:23,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:23,676 INFO L93 Difference]: Finished difference Result 32924 states and 60361 transitions. [2021-11-07 01:24:23,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:24:23,678 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 01:24:23,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:23,740 INFO L225 Difference]: With dead ends: 32924 [2021-11-07 01:24:23,740 INFO L226 Difference]: Without dead ends: 28341 [2021-11-07 01:24:23,749 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:24:23,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28341 states. [2021-11-07 01:24:24,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28341 to 8644. [2021-11-07 01:24:24,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8644 states, 8639 states have (on average 1.834124319944438) internal successors, (15845), 8643 states have internal predecessors, (15845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:24,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8644 states to 8644 states and 15845 transitions. [2021-11-07 01:24:24,331 INFO L78 Accepts]: Start accepts. Automaton has 8644 states and 15845 transitions. Word has length 70 [2021-11-07 01:24:24,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:24,331 INFO L470 AbstractCegarLoop]: Abstraction has 8644 states and 15845 transitions. [2021-11-07 01:24:24,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:24,332 INFO L276 IsEmpty]: Start isEmpty. Operand 8644 states and 15845 transitions. [2021-11-07 01:24:24,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:24:24,334 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:24,334 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 01:24:24,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-07 01:24:24,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:24:24,549 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:24:24,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:24,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1696318321, now seen corresponding path program 1 times [2021-11-07 01:24:24,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:24,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [504261302] [2021-11-07 01:24:24,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:24,551 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:24,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:24,552 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:24,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:24:25,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:25,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:24:25,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:25,293 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 01:24:25,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:25,485 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 01:24:25,485 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:25,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [504261302] [2021-11-07 01:24:25,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [504261302] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:25,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:25,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:24:25,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028222679] [2021-11-07 01:24:25,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:24:25,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:25,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:24:25,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:24:25,487 INFO L87 Difference]: Start difference. First operand 8644 states and 15845 transitions. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 5 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 01:24:26,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:26,439 INFO L93 Difference]: Finished difference Result 16225 states and 29650 transitions. [2021-11-07 01:24:26,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:24:26,441 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 5 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 01:24:26,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:26,460 INFO L225 Difference]: With dead ends: 16225 [2021-11-07 01:24:26,460 INFO L226 Difference]: Without dead ends: 11257 [2021-11-07 01:24:26,467 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:24:26,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11257 states. [2021-11-07 01:24:26,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11257 to 8630. [2021-11-07 01:24:26,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8630 states, 8625 states have (on average 1.833855072463768) internal successors, (15817), 8629 states have internal predecessors, (15817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:26,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8630 states to 8630 states and 15817 transitions. [2021-11-07 01:24:26,886 INFO L78 Accepts]: Start accepts. Automaton has 8630 states and 15817 transitions. Word has length 70 [2021-11-07 01:24:26,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:26,886 INFO L470 AbstractCegarLoop]: Abstraction has 8630 states and 15817 transitions. [2021-11-07 01:24:26,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 5 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 01:24:26,886 INFO L276 IsEmpty]: Start isEmpty. Operand 8630 states and 15817 transitions. [2021-11-07 01:24:26,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:24:26,889 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:26,889 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 01:24:26,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:27,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:24:27,104 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:24:27,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:27,106 INFO L85 PathProgramCache]: Analyzing trace with hash 391033993, now seen corresponding path program 1 times [2021-11-07 01:24:27,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:27,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1959531554] [2021-11-07 01:24:27,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:27,106 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:27,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:27,107 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:27,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:24:27,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:27,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:24:27,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:27,921 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 01:24:27,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:28,116 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 01:24:28,117 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:28,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1959531554] [2021-11-07 01:24:28,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1959531554] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:28,117 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:28,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:24:28,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294633758] [2021-11-07 01:24:28,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:24:28,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:28,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:24:28,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:24:28,119 INFO L87 Difference]: Start difference. First operand 8630 states and 15817 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 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 01:24:29,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:29,197 INFO L93 Difference]: Finished difference Result 34048 states and 62744 transitions. [2021-11-07 01:24:29,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:24:29,198 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 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 01:24:29,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:29,235 INFO L225 Difference]: With dead ends: 34048 [2021-11-07 01:24:29,235 INFO L226 Difference]: Without dead ends: 29090 [2021-11-07 01:24:29,243 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:24:29,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29090 states. [2021-11-07 01:24:29,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29090 to 13309. [2021-11-07 01:24:29,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13309 states, 13304 states have (on average 1.831028262176789) internal successors, (24360), 13308 states have internal predecessors, (24360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:29,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13309 states to 13309 states and 24360 transitions. [2021-11-07 01:24:29,995 INFO L78 Accepts]: Start accepts. Automaton has 13309 states and 24360 transitions. Word has length 72 [2021-11-07 01:24:29,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:29,995 INFO L470 AbstractCegarLoop]: Abstraction has 13309 states and 24360 transitions. [2021-11-07 01:24:29,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 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 01:24:29,996 INFO L276 IsEmpty]: Start isEmpty. Operand 13309 states and 24360 transitions. [2021-11-07 01:24:29,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:24:29,999 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:29,999 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:24:30,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:30,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:24:30,214 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:24:30,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:30,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1610521015, now seen corresponding path program 1 times [2021-11-07 01:24:30,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:30,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [89049105] [2021-11-07 01:24:30,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:30,216 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:30,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:30,216 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:30,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:24:30,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:30,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:24:30,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:31,034 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 01:24:31,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:31,320 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 01:24:31,321 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:31,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [89049105] [2021-11-07 01:24:31,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [89049105] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:31,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:31,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:24:31,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102422502] [2021-11-07 01:24:31,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:24:31,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:31,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:24:31,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:24:31,323 INFO L87 Difference]: Start difference. First operand 13309 states and 24360 transitions. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 5 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:34,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:34,937 INFO L93 Difference]: Finished difference Result 72302 states and 133237 transitions. [2021-11-07 01:24:34,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:24:34,938 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 5 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 01:24:34,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:35,012 INFO L225 Difference]: With dead ends: 72302 [2021-11-07 01:24:35,012 INFO L226 Difference]: Without dead ends: 62665 [2021-11-07 01:24:35,028 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:24:35,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62665 states. [2021-11-07 01:24:36,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62665 to 21397. [2021-11-07 01:24:36,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21397 states, 21392 states have (on average 1.838304038893044) internal successors, (39325), 21396 states have internal predecessors, (39325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:36,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21397 states to 21397 states and 39325 transitions. [2021-11-07 01:24:36,491 INFO L78 Accepts]: Start accepts. Automaton has 21397 states and 39325 transitions. Word has length 74 [2021-11-07 01:24:36,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:36,491 INFO L470 AbstractCegarLoop]: Abstraction has 21397 states and 39325 transitions. [2021-11-07 01:24:36,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 5 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:36,491 INFO L276 IsEmpty]: Start isEmpty. Operand 21397 states and 39325 transitions. [2021-11-07 01:24:36,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 01:24:36,494 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:36,494 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:24:36,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:36,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:24:36,710 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:24:36,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:36,711 INFO L85 PathProgramCache]: Analyzing trace with hash 972709890, now seen corresponding path program 1 times [2021-11-07 01:24:36,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:36,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [78372516] [2021-11-07 01:24:36,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:36,712 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:36,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:36,718 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:36,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:24:37,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:37,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:24:37,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:37,698 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 01:24:37,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:37,851 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 01:24:37,851 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:37,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [78372516] [2021-11-07 01:24:37,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [78372516] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:37,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:37,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:24:37,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540956416] [2021-11-07 01:24:37,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:24:37,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:37,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:24:37,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:24:37,853 INFO L87 Difference]: Start difference. First operand 21397 states and 39325 transitions. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:38,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:38,725 INFO L93 Difference]: Finished difference Result 39254 states and 72036 transitions. [2021-11-07 01:24:38,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:24:38,726 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-07 01:24:38,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:38,753 INFO L225 Difference]: With dead ends: 39254 [2021-11-07 01:24:38,753 INFO L226 Difference]: Without dead ends: 21412 [2021-11-07 01:24:38,771 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:24:38,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21412 states. [2021-11-07 01:24:39,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21412 to 21397. [2021-11-07 01:24:39,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21397 states, 21392 states have (on average 1.831666043380703) internal successors, (39183), 21396 states have internal predecessors, (39183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:39,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21397 states to 21397 states and 39183 transitions. [2021-11-07 01:24:39,925 INFO L78 Accepts]: Start accepts. Automaton has 21397 states and 39183 transitions. Word has length 81 [2021-11-07 01:24:39,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:39,926 INFO L470 AbstractCegarLoop]: Abstraction has 21397 states and 39183 transitions. [2021-11-07 01:24:39,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:39,926 INFO L276 IsEmpty]: Start isEmpty. Operand 21397 states and 39183 transitions. [2021-11-07 01:24:39,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 01:24:39,928 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:39,928 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:24:39,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:40,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:24:40,129 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:24:40,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:40,129 INFO L85 PathProgramCache]: Analyzing trace with hash 863201554, now seen corresponding path program 1 times [2021-11-07 01:24:40,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:40,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1420566631] [2021-11-07 01:24:40,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:40,130 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:40,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:40,131 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:40,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:24:40,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:40,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:24:40,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:41,097 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 01:24:41,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:41,377 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 01:24:41,377 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:41,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1420566631] [2021-11-07 01:24:41,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1420566631] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:41,377 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:41,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 01:24:41,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100658138] [2021-11-07 01:24:41,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:24:41,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:41,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:24:41,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:24:41,379 INFO L87 Difference]: Start difference. First operand 21397 states and 39183 transitions. Second operand has 4 states, 4 states have (on average 39.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:44,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:44,013 INFO L93 Difference]: Finished difference Result 82172 states and 150521 transitions. [2021-11-07 01:24:44,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:24:44,014 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 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 82 [2021-11-07 01:24:44,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:44,093 INFO L225 Difference]: With dead ends: 82172 [2021-11-07 01:24:44,093 INFO L226 Difference]: Without dead ends: 60992 [2021-11-07 01:24:44,108 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 160 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 01:24:44,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60992 states. [2021-11-07 01:24:47,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60992 to 60962. [2021-11-07 01:24:47,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60962 states, 60957 states have (on average 1.8263365979296882) internal successors, (111328), 60961 states have internal predecessors, (111328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:47,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60962 states to 60962 states and 111328 transitions. [2021-11-07 01:24:47,397 INFO L78 Accepts]: Start accepts. Automaton has 60962 states and 111328 transitions. Word has length 82 [2021-11-07 01:24:47,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:47,397 INFO L470 AbstractCegarLoop]: Abstraction has 60962 states and 111328 transitions. [2021-11-07 01:24:47,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:47,398 INFO L276 IsEmpty]: Start isEmpty. Operand 60962 states and 111328 transitions. [2021-11-07 01:24:47,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 01:24:47,400 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:47,400 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:24:47,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:47,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:24:47,601 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:24:47,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:47,601 INFO L85 PathProgramCache]: Analyzing trace with hash -536867876, now seen corresponding path program 1 times [2021-11-07 01:24:47,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:47,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [367736005] [2021-11-07 01:24:47,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:47,602 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:47,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:47,603 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:47,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17b12dcf-7841-41dc-bd46-dccaf08db9b5/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:24:48,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:48,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:24:48,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:48,695 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 01:24:48,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:48,940 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 01:24:48,940 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:48,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [367736005] [2021-11-07 01:24:48,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [367736005] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:48,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:48,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 01:24:48,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86377246] [2021-11-07 01:24:48,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:24:48,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:48,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:24:48,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:24:48,943 INFO L87 Difference]: Start difference. First operand 60962 states and 111328 transitions. Second operand has 4 states, 4 states have (on average 39.5) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:56,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:56,767 INFO L93 Difference]: Finished difference Result 238169 states and 434749 transitions. [2021-11-07 01:24:56,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:24:56,767 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-07 01:24:56,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:57,050 INFO L225 Difference]: With dead ends: 238169 [2021-11-07 01:24:57,050 INFO L226 Difference]: Without dead ends: 177425 [2021-11-07 01:24:57,108 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 162 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 01:24:57,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177425 states.