./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec13_product30.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_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/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_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/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_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/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 d84130cab59568fb669543ac086f4847eedfc87145b3c30d32e19c1d0d03b42f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:08:10,425 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:08:10,428 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:08:10,462 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:08:10,463 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:08:10,464 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:08:10,466 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:08:10,469 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:08:10,471 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:08:10,472 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:08:10,474 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:08:10,475 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:08:10,476 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:08:10,477 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:08:10,479 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:08:10,481 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:08:10,482 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:08:10,483 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:08:10,486 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:08:10,490 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:08:10,492 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:08:10,503 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:08:10,505 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:08:10,506 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:08:10,510 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:08:10,517 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:08:10,517 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:08:10,518 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:08:10,519 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:08:10,521 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:08:10,524 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:08:10,525 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:08:10,526 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:08:10,527 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:08:10,529 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:08:10,530 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:08:10,531 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:08:10,532 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:08:10,532 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:08:10,534 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:08:10,534 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:08:10,535 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:08:10,587 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:08:10,587 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:08:10,588 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:08:10,589 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:08:10,589 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:08:10,589 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:08:10,589 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:08:10,590 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:08:10,590 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:08:10,590 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:08:10,591 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:08:10,591 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:08:10,592 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:08:10,592 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:08:10,592 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:08:10,593 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:08:10,593 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:08:10,593 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:08:10,593 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:08:10,594 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:08:10,594 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:08:10,594 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:08:10,594 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:08:10,595 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:08:10,595 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:08:10,595 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:08:10,595 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:08:10,596 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:08:10,596 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:08:10,596 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:08:10,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:08:10,597 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:08:10,597 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:08:10,597 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:08:10,597 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:08:10,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:08:10,598 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:08:10,598 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:08:10,598 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:08:10,598 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_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d84130cab59568fb669543ac086f4847eedfc87145b3c30d32e19c1d0d03b42f [2021-11-07 01:08:10,884 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:08:10,912 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:08:10,915 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:08:10,916 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:08:10,917 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:08:10,918 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec13_product30.cil.c [2021-11-07 01:08:10,991 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/data/1b4b4d4be/a0af7ad6325f43b9b365bf2eeb9e49fe/FLAGb70130876 [2021-11-07 01:08:11,713 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:08:11,713 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/sv-benchmarks/c/product-lines/elevator_spec13_product30.cil.c [2021-11-07 01:08:11,750 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/data/1b4b4d4be/a0af7ad6325f43b9b365bf2eeb9e49fe/FLAGb70130876 [2021-11-07 01:08:11,836 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/data/1b4b4d4be/a0af7ad6325f43b9b365bf2eeb9e49fe [2021-11-07 01:08:11,843 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:08:11,844 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:08:11,852 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:08:11,852 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:08:11,856 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:08:11,857 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:08:11" (1/1) ... [2021-11-07 01:08:11,860 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a68df83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:11, skipping insertion in model container [2021-11-07 01:08:11,861 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:08:11" (1/1) ... [2021-11-07 01:08:11,868 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:08:11,957 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:08:12,538 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_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/sv-benchmarks/c/product-lines/elevator_spec13_product30.cil.c[61393,61406] [2021-11-07 01:08:12,602 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:08:12,619 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 01:08:12,620 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@718f8126 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:12, skipping insertion in model container [2021-11-07 01:08:12,620 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:08:12,620 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:08:12,624 INFO L168 Benchmark]: Toolchain (without parser) took 777.21 ms. Allocated memory was 96.5 MB in the beginning and 123.7 MB in the end (delta: 27.3 MB). Free memory was 62.3 MB in the beginning and 84.6 MB in the end (delta: -22.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:08:12,625 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 96.5 MB. Free memory is still 51.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:08:12,627 INFO L168 Benchmark]: CACSL2BoogieTranslator took 768.75 ms. Allocated memory was 96.5 MB in the beginning and 123.7 MB in the end (delta: 27.3 MB). Free memory was 62.1 MB in the beginning and 84.6 MB in the end (delta: -22.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:08:12,630 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 96.5 MB. Free memory is still 51.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 768.75 ms. Allocated memory was 96.5 MB in the beginning and 123.7 MB in the end (delta: 27.3 MB). Free memory was 62.1 MB in the beginning and 84.6 MB in the end (delta: -22.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 3048]: 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_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/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_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/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_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/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 d84130cab59568fb669543ac086f4847eedfc87145b3c30d32e19c1d0d03b42f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:08:14,815 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:08:14,819 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:08:14,853 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:08:14,854 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:08:14,855 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:08:14,857 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:08:14,859 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:08:14,861 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:08:14,863 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:08:14,864 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:08:14,865 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:08:14,866 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:08:14,867 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:08:14,868 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:08:14,870 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:08:14,871 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:08:14,872 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:08:14,874 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:08:14,876 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:08:14,878 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:08:14,880 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:08:14,882 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:08:14,883 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:08:14,887 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:08:14,887 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:08:14,887 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:08:14,889 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:08:14,889 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:08:14,890 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:08:14,891 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:08:14,892 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:08:14,893 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:08:14,893 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:08:14,895 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:08:14,901 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:08:14,911 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:08:14,911 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:08:14,912 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:08:14,913 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:08:14,914 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:08:14,919 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:08:14,970 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:08:14,970 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:08:14,971 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:08:14,972 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:08:14,972 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:08:14,972 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:08:14,972 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:08:14,972 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:08:14,972 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:08:14,974 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:08:14,975 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:08:14,975 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:08:14,975 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:08:14,975 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:08:14,976 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:08:14,976 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:08:14,976 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:08:14,976 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:08:14,976 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:08:14,977 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:08:14,977 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:08:14,977 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:08:14,977 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:08:14,977 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:08:14,978 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:08:14,978 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:08:14,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:08:14,978 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:08:14,978 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:08:14,978 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:08:14,979 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:08:14,979 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:08:14,979 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:08:14,979 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:08:14,980 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:08:14,980 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_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d84130cab59568fb669543ac086f4847eedfc87145b3c30d32e19c1d0d03b42f [2021-11-07 01:08:15,352 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:08:15,373 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:08:15,375 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:08:15,377 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:08:15,379 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:08:15,380 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec13_product30.cil.c [2021-11-07 01:08:15,448 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/data/b3f3cd3f6/93d311f890624210afbc0dbc7dd28334/FLAG8f8dc2ad5 [2021-11-07 01:08:16,223 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:08:16,232 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/sv-benchmarks/c/product-lines/elevator_spec13_product30.cil.c [2021-11-07 01:08:16,258 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/data/b3f3cd3f6/93d311f890624210afbc0dbc7dd28334/FLAG8f8dc2ad5 [2021-11-07 01:08:16,461 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/data/b3f3cd3f6/93d311f890624210afbc0dbc7dd28334 [2021-11-07 01:08:16,463 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:08:16,464 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:08:16,466 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:08:16,466 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:08:16,470 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:08:16,471 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:08:16" (1/1) ... [2021-11-07 01:08:16,472 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63f07c4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:16, skipping insertion in model container [2021-11-07 01:08:16,472 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:08:16" (1/1) ... [2021-11-07 01:08:16,479 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:08:16,567 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:08:17,012 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_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/sv-benchmarks/c/product-lines/elevator_spec13_product30.cil.c[61393,61406] [2021-11-07 01:08:17,059 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:08:17,078 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:08:17,107 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:08:17,281 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_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/sv-benchmarks/c/product-lines/elevator_spec13_product30.cil.c[61393,61406] [2021-11-07 01:08:17,310 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:08:17,323 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:08:17,445 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_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/sv-benchmarks/c/product-lines/elevator_spec13_product30.cil.c[61393,61406] [2021-11-07 01:08:17,457 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:08:17,488 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:08:17,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:17 WrapperNode [2021-11-07 01:08:17,489 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:08:17,490 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:08:17,490 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:08:17,490 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:08:17,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:17" (1/1) ... [2021-11-07 01:08:17,533 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:17" (1/1) ... [2021-11-07 01:08:18,652 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:08:18,653 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:08:18,656 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:08:18,657 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:08:18,674 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:17" (1/1) ... [2021-11-07 01:08:18,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:17" (1/1) ... [2021-11-07 01:08:18,978 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:17" (1/1) ... [2021-11-07 01:08:18,979 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:17" (1/1) ... [2021-11-07 01:08:19,366 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:17" (1/1) ... [2021-11-07 01:08:20,101 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:17" (1/1) ... [2021-11-07 01:08:20,216 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:17" (1/1) ... [2021-11-07 01:08:20,517 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:08:20,519 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:08:20,521 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:08:20,522 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:08:20,523 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:17" (1/1) ... [2021-11-07 01:08:20,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:08:20,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:08:20,573 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:08:20,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:08:20,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:08:20,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:08:20,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:08:20,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:08:51,967 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:08:51,968 INFO L299 CfgBuilder]: Removed 3811 assume(true) statements. [2021-11-07 01:08:51,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:08:51 BoogieIcfgContainer [2021-11-07 01:08:51,987 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:08:51,989 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:08:51,989 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:08:51,992 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:08:51,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:08:16" (1/3) ... [2021-11-07 01:08:51,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a1e4aaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:08:51, skipping insertion in model container [2021-11-07 01:08:51,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:17" (2/3) ... [2021-11-07 01:08:51,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a1e4aaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:08:51, skipping insertion in model container [2021-11-07 01:08:51,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:08:51" (3/3) ... [2021-11-07 01:08:51,995 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product30.cil.c [2021-11-07 01:08:52,001 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:08:52,001 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2021-11-07 01:08:52,117 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:08:52,123 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 01:08:52,124 INFO L340 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-11-07 01:08:52,409 INFO L276 IsEmpty]: Start isEmpty. Operand has 17676 states, 17665 states have (on average 1.894650438720634) internal successors, (33469), 17675 states have internal predecessors, (33469), 0 states have call successors, (0), 0 states 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 01:08:52,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 01:08:52,434 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:08:52,434 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] [2021-11-07 01:08:52,435 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:08:52,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:08:52,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1159219265, now seen corresponding path program 1 times [2021-11-07 01:08:52,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:08:52,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1011071154] [2021-11-07 01:08:52,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:08:52,457 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:08:52,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:08:52,459 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:08:52,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:08:52,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:08:52,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:08:52,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:08:53,034 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 01:08:53,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:08:53,151 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 01:08:53,152 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:08:53,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1011071154] [2021-11-07 01:08:53,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1011071154] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:08:53,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:08:53,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:08:53,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424684217] [2021-11-07 01:08:53,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:08:53,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:08:53,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:08:53,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:08:53,237 INFO L87 Difference]: Start difference. First operand has 17676 states, 17665 states have (on average 1.894650438720634) internal successors, (33469), 17675 states have internal predecessors, (33469), 0 states have call successors, (0), 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 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states 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 01:08:54,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:08:54,192 INFO L93 Difference]: Finished difference Result 31873 states and 60343 transitions. [2021-11-07 01:08:54,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:08:54,194 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-11-07 01:08:54,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:08:54,344 INFO L225 Difference]: With dead ends: 31873 [2021-11-07 01:08:54,344 INFO L226 Difference]: Without dead ends: 17672 [2021-11-07 01:08:54,377 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 80 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 01:08:54,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17672 states. [2021-11-07 01:08:55,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17672 to 17672. [2021-11-07 01:08:55,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17672 states, 17662 states have (on average 1.8871022534254331) internal successors, (33330), 17671 states have internal predecessors, (33330), 0 states have call successors, (0), 0 states 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 01:08:55,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17672 states to 17672 states and 33330 transitions. [2021-11-07 01:08:55,271 INFO L78 Accepts]: Start accepts. Automaton has 17672 states and 33330 transitions. Word has length 41 [2021-11-07 01:08:55,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:08:55,272 INFO L470 AbstractCegarLoop]: Abstraction has 17672 states and 33330 transitions. [2021-11-07 01:08:55,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states 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 01:08:55,273 INFO L276 IsEmpty]: Start isEmpty. Operand 17672 states and 33330 transitions. [2021-11-07 01:08:55,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 01:08:55,283 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:08:55,284 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] [2021-11-07 01:08:55,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:08:55,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:08:55,503 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:08:55,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:08:55,506 INFO L85 PathProgramCache]: Analyzing trace with hash 640332675, now seen corresponding path program 1 times [2021-11-07 01:08:55,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:08:55,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [181981073] [2021-11-07 01:08:55,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:08:55,508 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:08:55,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:08:55,509 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:08:55,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:08:55,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:08:55,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:08:55,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:08:56,017 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 01:08:56,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:08:56,162 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 01:08:56,162 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:08:56,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [181981073] [2021-11-07 01:08:56,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [181981073] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:08:56,163 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:08:56,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:08:56,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565456347] [2021-11-07 01:08:56,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:08:56,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:08:56,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:08:56,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:08:56,171 INFO L87 Difference]: Start difference. First operand 17672 states and 33330 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 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 01:08:58,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:08:58,807 INFO L93 Difference]: Finished difference Result 60017 states and 113196 transitions. [2021-11-07 01:08:58,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:08:58,808 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 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 41 [2021-11-07 01:08:58,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:08:59,020 INFO L225 Difference]: With dead ends: 60017 [2021-11-07 01:08:59,020 INFO L226 Difference]: Without dead ends: 42353 [2021-11-07 01:08:59,072 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 78 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 01:08:59,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42353 states. [2021-11-07 01:09:00,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42353 to 17668. [2021-11-07 01:09:00,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17668 states, 17658 states have (on average 1.8869067844603014) internal successors, (33319), 17667 states have internal predecessors, (33319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:00,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17668 states to 17668 states and 33319 transitions. [2021-11-07 01:09:00,177 INFO L78 Accepts]: Start accepts. Automaton has 17668 states and 33319 transitions. Word has length 41 [2021-11-07 01:09:00,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:00,178 INFO L470 AbstractCegarLoop]: Abstraction has 17668 states and 33319 transitions. [2021-11-07 01:09:00,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 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 01:09:00,179 INFO L276 IsEmpty]: Start isEmpty. Operand 17668 states and 33319 transitions. [2021-11-07 01:09:00,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-07 01:09:00,185 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:00,193 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 01:09:00,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:00,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:00,407 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:09:00,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:00,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1365607243, now seen corresponding path program 1 times [2021-11-07 01:09:00,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:00,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1066249738] [2021-11-07 01:09:00,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:00,409 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:00,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:00,412 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:00,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:09:00,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:00,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:09:00,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:00,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:00,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:01,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:01,075 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:01,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1066249738] [2021-11-07 01:09:01,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1066249738] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:01,076 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:01,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:09:01,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899595359] [2021-11-07 01:09:01,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:09:01,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:01,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:09:01,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:09:01,077 INFO L87 Difference]: Start difference. First operand 17668 states and 33319 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:07,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:07,328 INFO L93 Difference]: Finished difference Result 123057 states and 232064 transitions. [2021-11-07 01:09:07,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:09:07,329 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 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 01:09:07,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:07,682 INFO L225 Difference]: With dead ends: 123057 [2021-11-07 01:09:07,682 INFO L226 Difference]: Without dead ends: 105408 [2021-11-07 01:09:07,750 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:09:07,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105408 states. [2021-11-07 01:09:09,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105408 to 17657. [2021-11-07 01:09:09,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17657 states, 17647 states have (on average 1.8858162860542869) internal successors, (33279), 17656 states have internal predecessors, (33279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:09,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17657 states to 17657 states and 33279 transitions. [2021-11-07 01:09:09,301 INFO L78 Accepts]: Start accepts. Automaton has 17657 states and 33279 transitions. Word has length 43 [2021-11-07 01:09:09,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:09,301 INFO L470 AbstractCegarLoop]: Abstraction has 17657 states and 33279 transitions. [2021-11-07 01:09:09,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:09,302 INFO L276 IsEmpty]: Start isEmpty. Operand 17657 states and 33279 transitions. [2021-11-07 01:09:09,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 01:09:09,305 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:09,305 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:09:09,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:09,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:09,522 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:09:09,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:09,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1651455796, now seen corresponding path program 1 times [2021-11-07 01:09:09,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:09,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [643102101] [2021-11-07 01:09:09,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:09,524 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:09,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:09,525 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:09,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:09:09,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:09,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:09:09,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:10,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:10,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:10,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:10,352 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:10,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [643102101] [2021-11-07 01:09:10,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [643102101] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:10,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:10,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:09:10,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434371537] [2021-11-07 01:09:10,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:09:10,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:10,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:09:10,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:09:10,355 INFO L87 Difference]: Start difference. First operand 17657 states and 33279 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:12,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:12,119 INFO L93 Difference]: Finished difference Result 59881 states and 112889 transitions. [2021-11-07 01:09:12,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:09:12,120 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-07 01:09:12,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:12,254 INFO L225 Difference]: With dead ends: 59881 [2021-11-07 01:09:12,254 INFO L226 Difference]: Without dead ends: 42239 [2021-11-07 01:09:12,284 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:09:12,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42239 states. [2021-11-07 01:09:13,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42239 to 17653. [2021-11-07 01:09:13,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17653 states, 17643 states have (on average 1.8853936405373235) internal successors, (33264), 17652 states have internal predecessors, (33264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:13,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17653 states to 17653 states and 33264 transitions. [2021-11-07 01:09:13,233 INFO L78 Accepts]: Start accepts. Automaton has 17653 states and 33264 transitions. Word has length 48 [2021-11-07 01:09:13,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:13,234 INFO L470 AbstractCegarLoop]: Abstraction has 17653 states and 33264 transitions. [2021-11-07 01:09:13,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:13,235 INFO L276 IsEmpty]: Start isEmpty. Operand 17653 states and 33264 transitions. [2021-11-07 01:09:13,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 01:09:13,238 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:13,238 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 01:09:13,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:13,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:13,458 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:09:13,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:13,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1472561252, now seen corresponding path program 1 times [2021-11-07 01:09:13,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:13,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1787360588] [2021-11-07 01:09:13,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:13,459 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:13,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:13,460 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:13,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:09:13,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:13,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:09:13,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:13,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:13,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:14,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:14,144 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:14,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1787360588] [2021-11-07 01:09:14,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1787360588] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:14,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:14,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:09:14,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360158447] [2021-11-07 01:09:14,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:09:14,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:14,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:09:14,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:09:14,147 INFO L87 Difference]: Start difference. First operand 17653 states and 33264 transitions. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:23,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:23,094 INFO L93 Difference]: Finished difference Result 193301 states and 364473 transitions. [2021-11-07 01:09:23,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 01:09:23,095 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 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 01:09:23,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:23,414 INFO L225 Difference]: With dead ends: 193301 [2021-11-07 01:09:23,414 INFO L226 Difference]: Without dead ends: 175668 [2021-11-07 01:09:23,463 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=497, Unknown=0, NotChecked=0, Total=702 [2021-11-07 01:09:23,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175668 states. [2021-11-07 01:09:25,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175668 to 17666. [2021-11-07 01:09:25,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17666 states, 17656 states have (on average 1.8844585410058903) internal successors, (33272), 17665 states have internal predecessors, (33272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:25,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17666 states to 17666 states and 33272 transitions. [2021-11-07 01:09:25,425 INFO L78 Accepts]: Start accepts. Automaton has 17666 states and 33272 transitions. Word has length 50 [2021-11-07 01:09:25,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:25,426 INFO L470 AbstractCegarLoop]: Abstraction has 17666 states and 33272 transitions. [2021-11-07 01:09:25,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:25,426 INFO L276 IsEmpty]: Start isEmpty. Operand 17666 states and 33272 transitions. [2021-11-07 01:09:25,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 01:09:25,429 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:25,429 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] [2021-11-07 01:09:25,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:25,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:25,636 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:09:25,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:25,636 INFO L85 PathProgramCache]: Analyzing trace with hash 567935523, now seen corresponding path program 1 times [2021-11-07 01:09:25,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:25,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [495175961] [2021-11-07 01:09:25,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:25,638 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:25,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:25,639 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:25,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:09:26,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:26,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:09:26,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:26,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:26,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:26,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:26,347 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:26,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [495175961] [2021-11-07 01:09:26,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [495175961] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:26,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:26,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:09:26,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878575459] [2021-11-07 01:09:26,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:09:26,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:26,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:09:26,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:09:26,351 INFO L87 Difference]: Start difference. First operand 17666 states and 33272 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:30,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:30,984 INFO L93 Difference]: Finished difference Result 123043 states and 231944 transitions. [2021-11-07 01:09:30,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:09:30,984 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-07 01:09:30,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:31,186 INFO L225 Difference]: With dead ends: 123043 [2021-11-07 01:09:31,187 INFO L226 Difference]: Without dead ends: 105429 [2021-11-07 01:09:31,220 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:09:31,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105429 states. [2021-11-07 01:09:32,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105429 to 17678. [2021-11-07 01:09:32,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17678 states, 17668 states have (on average 1.883857822051166) internal successors, (33284), 17677 states have internal predecessors, (33284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:32,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17678 states to 17678 states and 33284 transitions. [2021-11-07 01:09:32,465 INFO L78 Accepts]: Start accepts. Automaton has 17678 states and 33284 transitions. Word has length 54 [2021-11-07 01:09:32,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:32,465 INFO L470 AbstractCegarLoop]: Abstraction has 17678 states and 33284 transitions. [2021-11-07 01:09:32,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:32,465 INFO L276 IsEmpty]: Start isEmpty. Operand 17678 states and 33284 transitions. [2021-11-07 01:09:32,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 01:09:32,468 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:32,468 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] [2021-11-07 01:09:32,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:32,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:32,670 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:09:32,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:32,672 INFO L85 PathProgramCache]: Analyzing trace with hash 794143774, now seen corresponding path program 1 times [2021-11-07 01:09:32,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:32,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [294988383] [2021-11-07 01:09:32,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:32,673 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:32,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:32,674 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:32,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:09:33,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:33,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:09:33,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:33,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:33,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:33,320 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 01:09:33,321 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:33,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [294988383] [2021-11-07 01:09:33,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [294988383] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:33,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:33,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:09:33,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900388514] [2021-11-07 01:09:33,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:09:33,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:33,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:09:33,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:09:33,323 INFO L87 Difference]: Start difference. First operand 17678 states and 33284 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:34,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:34,284 INFO L93 Difference]: Finished difference Result 42330 states and 79750 transitions. [2021-11-07 01:09:34,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:09:34,284 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-11-07 01:09:34,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:34,320 INFO L225 Difference]: With dead ends: 42330 [2021-11-07 01:09:34,320 INFO L226 Difference]: Without dead ends: 24680 [2021-11-07 01:09:34,338 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:09:34,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24680 states. [2021-11-07 01:09:35,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24680 to 17630. [2021-11-07 01:09:35,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17630 states, 17620 states have (on average 1.8845062429057888) internal successors, (33205), 17629 states have internal predecessors, (33205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:35,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17630 states to 17630 states and 33205 transitions. [2021-11-07 01:09:35,095 INFO L78 Accepts]: Start accepts. Automaton has 17630 states and 33205 transitions. Word has length 54 [2021-11-07 01:09:35,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:09:35,096 INFO L470 AbstractCegarLoop]: Abstraction has 17630 states and 33205 transitions. [2021-11-07 01:09:35,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:35,096 INFO L276 IsEmpty]: Start isEmpty. Operand 17630 states and 33205 transitions. [2021-11-07 01:09:35,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 01:09:35,098 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:09:35,098 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:09:35,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:09:35,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:09:35,299 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:09:35,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:09:35,300 INFO L85 PathProgramCache]: Analyzing trace with hash -36716909, now seen corresponding path program 1 times [2021-11-07 01:09:35,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:09:35,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [988192253] [2021-11-07 01:09:35,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:09:35,300 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:09:35,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:09:35,301 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:09:35,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ced4dc-65b9-4f99-a60e-96b5f0fd65b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:09:35,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:09:35,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:09:35,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:09:35,820 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 01:09:35,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:09:35,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:09:35,950 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:09:35,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [988192253] [2021-11-07 01:09:35,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [988192253] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:09:35,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:09:35,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:09:35,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449685472] [2021-11-07 01:09:35,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:09:35,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:09:35,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:09:35,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:09:35,952 INFO L87 Difference]: Start difference. First operand 17630 states and 33205 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:09:37,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:09:37,017 INFO L93 Difference]: Finished difference Result 42277 states and 79656 transitions. [2021-11-07 01:09:37,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:09:37,023 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-07 01:09:37,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:09:37,071 INFO L225 Difference]: With dead ends: 42277 [2021-11-07 01:09:37,071 INFO L226 Difference]: Without dead ends: 24678 [2021-11-07 01:09:37,091 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:09:37,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24678 states.