./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product20.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_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/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_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product20.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/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_9abf63f3-bb52-442c-8318-58632a339dd9/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 b7f63e91390dfc262975e205f156f8c4cc9b5ede7dbe2a20685844995f7cce81 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:49:01,352 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:49:01,355 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:49:01,423 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:49:01,424 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:49:01,431 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:49:01,433 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:49:01,438 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:49:01,441 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:49:01,451 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:49:01,452 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:49:01,455 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:49:01,455 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:49:01,459 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:49:01,461 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:49:01,468 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:49:01,470 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:49:01,471 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:49:01,474 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:49:01,484 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:49:01,486 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:49:01,488 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:49:01,492 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:49:01,494 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:49:01,499 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:49:01,499 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:49:01,500 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:49:01,503 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:49:01,504 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:49:01,506 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:49:01,507 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:49:01,509 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:49:01,516 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:49:01,518 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:49:01,520 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:49:01,520 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:49:01,521 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:49:01,522 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:49:01,522 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:49:01,523 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:49:01,524 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:49:01,525 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:49:01,577 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:49:01,577 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:49:01,579 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:49:01,579 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:49:01,580 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:49:01,580 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:49:01,580 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:49:01,580 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:49:01,581 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:49:01,581 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:49:01,582 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:49:01,583 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:49:01,583 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:49:01,583 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:49:01,583 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:49:01,584 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:49:01,585 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:49:01,585 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:49:01,585 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:49:01,585 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:49:01,586 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:49:01,586 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:49:01,586 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:49:01,586 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:49:01,587 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:49:01,587 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:49:01,587 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:49:01,587 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:49:01,588 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:49:01,590 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:49:01,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:49:01,590 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:49:01,591 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:49:01,591 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:49:01,591 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:49:01,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:49:01,592 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:49:01,592 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:49:01,592 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:49:01,593 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_9abf63f3-bb52-442c-8318-58632a339dd9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b7f63e91390dfc262975e205f156f8c4cc9b5ede7dbe2a20685844995f7cce81 [2021-11-07 01:49:01,946 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:49:01,984 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:49:01,987 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:49:01,988 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:49:01,989 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:49:01,990 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec3_product20.cil.c [2021-11-07 01:49:02,080 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/data/b69454546/59cf6c436c804ea88ec73da17bac38b6/FLAGb9c636631 [2021-11-07 01:49:02,944 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:49:02,945 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/sv-benchmarks/c/product-lines/elevator_spec3_product20.cil.c [2021-11-07 01:49:02,987 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/data/b69454546/59cf6c436c804ea88ec73da17bac38b6/FLAGb9c636631 [2021-11-07 01:49:03,066 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/data/b69454546/59cf6c436c804ea88ec73da17bac38b6 [2021-11-07 01:49:03,070 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:49:03,072 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:49:03,074 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:49:03,074 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:49:03,078 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:49:03,079 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:49:03" (1/1) ... [2021-11-07 01:49:03,081 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@db350a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:03, skipping insertion in model container [2021-11-07 01:49:03,081 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:49:03" (1/1) ... [2021-11-07 01:49:03,090 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:49:03,196 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:49:03,862 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_9abf63f3-bb52-442c-8318-58632a339dd9/sv-benchmarks/c/product-lines/elevator_spec3_product20.cil.c[62576,62589] [2021-11-07 01:49:03,920 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:49:03,936 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 01:49:03,936 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@10176f3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:03, skipping insertion in model container [2021-11-07 01:49:03,937 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:49:03,937 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:49:03,940 INFO L168 Benchmark]: Toolchain (without parser) took 866.61 ms. Allocated memory is still 100.7 MB. Free memory was 55.7 MB in the beginning and 61.1 MB in the end (delta: -5.5 MB). Peak memory consumption was 7.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:49:03,941 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 100.7 MB. Free memory was 74.7 MB in the beginning and 74.6 MB in the end (delta: 55.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:49:03,944 INFO L168 Benchmark]: CACSL2BoogieTranslator took 863.03 ms. Allocated memory is still 100.7 MB. Free memory was 55.5 MB in the beginning and 61.3 MB in the end (delta: -5.9 MB). Peak memory consumption was 5.0 MB. Max. memory is 16.1 GB. [2021-11-07 01:49:03,945 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 100.7 MB. Free memory was 74.7 MB in the beginning and 74.6 MB in the end (delta: 55.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 863.03 ms. Allocated memory is still 100.7 MB. Free memory was 55.5 MB in the beginning and 61.3 MB in the end (delta: -5.9 MB). Peak memory consumption was 5.0 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2425]: 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_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/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_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product20.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/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_9abf63f3-bb52-442c-8318-58632a339dd9/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 b7f63e91390dfc262975e205f156f8c4cc9b5ede7dbe2a20685844995f7cce81 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:49:06,431 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:49:06,433 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:49:06,490 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:49:06,491 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:49:06,496 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:49:06,499 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:49:06,511 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:49:06,516 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:49:06,525 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:49:06,526 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:49:06,527 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:49:06,528 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:49:06,529 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:49:06,531 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:49:06,533 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:49:06,534 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:49:06,535 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:49:06,544 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:49:06,556 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:49:06,559 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:49:06,561 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:49:06,569 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:49:06,571 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:49:06,578 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:49:06,579 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:49:06,579 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:49:06,581 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:49:06,581 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:49:06,583 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:49:06,583 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:49:06,584 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:49:06,585 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:49:06,586 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:49:06,592 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:49:06,594 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:49:06,595 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:49:06,595 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:49:06,596 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:49:06,598 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:49:06,599 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:49:06,600 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:49:06,651 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:49:06,651 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:49:06,652 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:49:06,653 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:49:06,653 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:49:06,653 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:49:06,653 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:49:06,654 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:49:06,654 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:49:06,656 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:49:06,657 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:49:06,657 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:49:06,657 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:49:06,658 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:49:06,658 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:49:06,658 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:49:06,659 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:49:06,659 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:49:06,659 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:49:06,659 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:49:06,659 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:49:06,660 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:49:06,660 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:49:06,660 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:49:06,660 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:49:06,661 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:49:06,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:49:06,661 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:49:06,661 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:49:06,662 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:49:06,662 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:49:06,662 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:49:06,662 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:49:06,663 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:49:06,663 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:49:06,663 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_9abf63f3-bb52-442c-8318-58632a339dd9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b7f63e91390dfc262975e205f156f8c4cc9b5ede7dbe2a20685844995f7cce81 [2021-11-07 01:49:07,119 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:49:07,148 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:49:07,151 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:49:07,152 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:49:07,156 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:49:07,157 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec3_product20.cil.c [2021-11-07 01:49:07,246 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/data/fc4f01bc8/2113c3a732c04faa8002dbd597cea49f/FLAGc797e645a [2021-11-07 01:49:08,253 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:49:08,254 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/sv-benchmarks/c/product-lines/elevator_spec3_product20.cil.c [2021-11-07 01:49:08,298 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/data/fc4f01bc8/2113c3a732c04faa8002dbd597cea49f/FLAGc797e645a [2021-11-07 01:49:08,313 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/data/fc4f01bc8/2113c3a732c04faa8002dbd597cea49f [2021-11-07 01:49:08,316 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:49:08,318 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:49:08,319 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:49:08,320 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:49:08,324 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:49:08,325 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:49:08" (1/1) ... [2021-11-07 01:49:08,326 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1090885c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:08, skipping insertion in model container [2021-11-07 01:49:08,327 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:49:08" (1/1) ... [2021-11-07 01:49:08,335 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:49:08,407 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:49:09,147 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_9abf63f3-bb52-442c-8318-58632a339dd9/sv-benchmarks/c/product-lines/elevator_spec3_product20.cil.c[62576,62589] [2021-11-07 01:49:09,197 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:49:09,213 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:49:09,253 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:49:09,400 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_9abf63f3-bb52-442c-8318-58632a339dd9/sv-benchmarks/c/product-lines/elevator_spec3_product20.cil.c[62576,62589] [2021-11-07 01:49:09,426 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:49:09,437 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:49:09,549 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_9abf63f3-bb52-442c-8318-58632a339dd9/sv-benchmarks/c/product-lines/elevator_spec3_product20.cil.c[62576,62589] [2021-11-07 01:49:09,560 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:49:09,600 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:49:09,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:09 WrapperNode [2021-11-07 01:49:09,601 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:49:09,602 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:49:09,603 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:49:09,603 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:49:09,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:09" (1/1) ... [2021-11-07 01:49:09,668 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:09" (1/1) ... [2021-11-07 01:49:10,407 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:49:10,408 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:49:10,408 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:49:10,409 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:49:10,417 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:09" (1/1) ... [2021-11-07 01:49:10,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:09" (1/1) ... [2021-11-07 01:49:10,575 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:09" (1/1) ... [2021-11-07 01:49:10,575 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:09" (1/1) ... [2021-11-07 01:49:10,889 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:09" (1/1) ... [2021-11-07 01:49:11,225 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:09" (1/1) ... [2021-11-07 01:49:11,261 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:09" (1/1) ... [2021-11-07 01:49:11,471 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:49:11,472 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:49:11,472 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:49:11,472 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:49:11,473 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:09" (1/1) ... [2021-11-07 01:49:11,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:49:11,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:49:11,562 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:49:11,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:49:11,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:49:11,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:49:11,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:49:11,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:49:38,510 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:49:38,510 INFO L299 CfgBuilder]: Removed 2777 assume(true) statements. [2021-11-07 01:49:38,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:49:38 BoogieIcfgContainer [2021-11-07 01:49:38,526 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:49:38,529 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:49:38,529 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:49:38,532 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:49:38,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:49:08" (1/3) ... [2021-11-07 01:49:38,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25ae24ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:49:38, skipping insertion in model container [2021-11-07 01:49:38,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:09" (2/3) ... [2021-11-07 01:49:38,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25ae24ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:49:38, skipping insertion in model container [2021-11-07 01:49:38,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:49:38" (3/3) ... [2021-11-07 01:49:38,535 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product20.cil.c [2021-11-07 01:49:38,541 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:49:38,541 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2021-11-07 01:49:38,638 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:49:38,645 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 01:49:38,645 INFO L340 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-11-07 01:49:38,841 INFO L276 IsEmpty]: Start isEmpty. Operand has 11983 states, 11972 states have (on average 1.8885733377881724) internal successors, (22610), 11982 states have internal predecessors, (22610), 0 states have call successors, (0), 0 states 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 01:49:38,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 01:49:38,851 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:38,852 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] [2021-11-07 01:49:38,853 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 01:49:38,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:38,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1413995396, now seen corresponding path program 1 times [2021-11-07 01:49:38,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:38,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1800972278] [2021-11-07 01:49:38,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:38,881 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:38,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:38,888 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:38,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:49:39,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:39,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:49:39,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:39,578 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 01:49:39,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:39,712 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 01:49:39,713 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:39,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1800972278] [2021-11-07 01:49:39,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1800972278] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:39,714 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:39,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:49:39,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806061266] [2021-11-07 01:49:39,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:49:39,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:39,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:49:39,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:49:39,783 INFO L87 Difference]: Start difference. First operand has 11983 states, 11972 states have (on average 1.8885733377881724) internal successors, (22610), 11982 states have internal predecessors, (22610), 0 states have call successors, (0), 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 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states 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 01:49:44,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:44,464 INFO L93 Difference]: Finished difference Result 83503 states and 157551 transitions. [2021-11-07 01:49:44,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:49:44,467 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 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 30 [2021-11-07 01:49:44,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:44,952 INFO L225 Difference]: With dead ends: 83503 [2021-11-07 01:49:44,952 INFO L226 Difference]: Without dead ends: 71521 [2021-11-07 01:49:45,014 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:49:45,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71521 states. [2021-11-07 01:49:46,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71521 to 11995. [2021-11-07 01:49:46,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11995 states, 11985 states have (on average 1.8862745098039215) internal successors, (22607), 11994 states have internal predecessors, (22607), 0 states have call successors, (0), 0 states 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 01:49:46,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11995 states to 11995 states and 22607 transitions. [2021-11-07 01:49:46,244 INFO L78 Accepts]: Start accepts. Automaton has 11995 states and 22607 transitions. Word has length 30 [2021-11-07 01:49:46,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:46,245 INFO L470 AbstractCegarLoop]: Abstraction has 11995 states and 22607 transitions. [2021-11-07 01:49:46,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states 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 01:49:46,247 INFO L276 IsEmpty]: Start isEmpty. Operand 11995 states and 22607 transitions. [2021-11-07 01:49:46,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-07 01:49:46,255 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:46,255 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] [2021-11-07 01:49:46,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:46,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:46,470 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 01:49:46,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:46,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1092644314, now seen corresponding path program 1 times [2021-11-07 01:49:46,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:46,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1160245017] [2021-11-07 01:49:46,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:46,476 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:46,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:46,478 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:46,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:49:46,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:46,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:49:46,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:46,979 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 01:49:46,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:47,095 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 01:49:47,095 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:47,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1160245017] [2021-11-07 01:49:47,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1160245017] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:47,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:47,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:49:47,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677874569] [2021-11-07 01:49:47,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:49:47,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:47,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:49:47,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:49:47,105 INFO L87 Difference]: Start difference. First operand 11995 states and 22607 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states 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 01:49:47,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:47,878 INFO L93 Difference]: Finished difference Result 23902 states and 45057 transitions. [2021-11-07 01:49:47,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:49:47,879 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 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 32 [2021-11-07 01:49:47,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:47,917 INFO L225 Difference]: With dead ends: 23902 [2021-11-07 01:49:47,917 INFO L226 Difference]: Without dead ends: 11921 [2021-11-07 01:49:47,936 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 61 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 01:49:47,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11921 states. [2021-11-07 01:49:48,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11921 to 11921. [2021-11-07 01:49:48,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11921 states, 11911 states have (on average 1.885903786415918) internal successors, (22463), 11920 states have internal predecessors, (22463), 0 states have call successors, (0), 0 states 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 01:49:48,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11921 states to 11921 states and 22463 transitions. [2021-11-07 01:49:48,305 INFO L78 Accepts]: Start accepts. Automaton has 11921 states and 22463 transitions. Word has length 32 [2021-11-07 01:49:48,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:48,307 INFO L470 AbstractCegarLoop]: Abstraction has 11921 states and 22463 transitions. [2021-11-07 01:49:48,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states 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 01:49:48,308 INFO L276 IsEmpty]: Start isEmpty. Operand 11921 states and 22463 transitions. [2021-11-07 01:49:48,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-07 01:49:48,310 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:48,316 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] [2021-11-07 01:49:48,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:48,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:48,538 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 01:49:48,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:48,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1862319100, now seen corresponding path program 1 times [2021-11-07 01:49:48,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:48,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1161923730] [2021-11-07 01:49:48,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:48,547 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:48,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:48,549 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:48,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:49:48,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:48,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:49:48,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:49,095 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 01:49:49,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:49,350 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 01:49:49,351 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:49,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1161923730] [2021-11-07 01:49:49,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1161923730] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:49,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:49,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:49:49,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522453534] [2021-11-07 01:49:49,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:49:49,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:49,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:49:49,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:49:49,355 INFO L87 Difference]: Start difference. First operand 11921 states and 22463 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states 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 01:49:50,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:50,450 INFO L93 Difference]: Finished difference Result 23816 states and 44889 transitions. [2021-11-07 01:49:50,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:49:50,451 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 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 34 [2021-11-07 01:49:50,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:50,485 INFO L225 Difference]: With dead ends: 23816 [2021-11-07 01:49:50,486 INFO L226 Difference]: Without dead ends: 11921 [2021-11-07 01:49:50,502 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:49:50,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11921 states. [2021-11-07 01:49:50,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11921 to 11921. [2021-11-07 01:49:50,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11921 states, 11911 states have (on average 1.885064226345395) internal successors, (22453), 11920 states have internal predecessors, (22453), 0 states have call successors, (0), 0 states 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 01:49:50,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11921 states to 11921 states and 22453 transitions. [2021-11-07 01:49:50,993 INFO L78 Accepts]: Start accepts. Automaton has 11921 states and 22453 transitions. Word has length 34 [2021-11-07 01:49:50,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:50,993 INFO L470 AbstractCegarLoop]: Abstraction has 11921 states and 22453 transitions. [2021-11-07 01:49:50,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states 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 01:49:50,996 INFO L276 IsEmpty]: Start isEmpty. Operand 11921 states and 22453 transitions. [2021-11-07 01:49:51,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 01:49:51,000 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:51,000 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] [2021-11-07 01:49:51,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:51,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:51,216 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 01:49:51,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:51,216 INFO L85 PathProgramCache]: Analyzing trace with hash -77638670, now seen corresponding path program 1 times [2021-11-07 01:49:51,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:51,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1098819483] [2021-11-07 01:49:51,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:51,218 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:51,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:51,222 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:51,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:49:51,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:51,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:49:51,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:51,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:51,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:52,066 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 01:49:52,066 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:52,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1098819483] [2021-11-07 01:49:52,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1098819483] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:52,067 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:52,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:49:52,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217759713] [2021-11-07 01:49:52,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:49:52,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:52,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:49:52,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:49:52,069 INFO L87 Difference]: Start difference. First operand 11921 states and 22453 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 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 01:50:02,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:02,007 INFO L93 Difference]: Finished difference Result 53036 states and 99501 transitions. [2021-11-07 01:50:02,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 01:50:02,007 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 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 38 [2021-11-07 01:50:02,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:02,177 INFO L225 Difference]: With dead ends: 53036 [2021-11-07 01:50:02,178 INFO L226 Difference]: Without dead ends: 41185 [2021-11-07 01:50:02,208 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:50:02,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41185 states. [2021-11-07 01:50:03,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41185 to 21144. [2021-11-07 01:50:03,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21144 states, 21134 states have (on average 1.8844042774675878) internal successors, (39825), 21143 states have internal predecessors, (39825), 0 states have call successors, (0), 0 states 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 01:50:03,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21144 states to 21144 states and 39825 transitions. [2021-11-07 01:50:03,626 INFO L78 Accepts]: Start accepts. Automaton has 21144 states and 39825 transitions. Word has length 38 [2021-11-07 01:50:03,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:03,626 INFO L470 AbstractCegarLoop]: Abstraction has 21144 states and 39825 transitions. [2021-11-07 01:50:03,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 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 01:50:03,627 INFO L276 IsEmpty]: Start isEmpty. Operand 21144 states and 39825 transitions. [2021-11-07 01:50:03,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 01:50:03,627 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:03,628 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] [2021-11-07 01:50:03,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:03,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:50:03,842 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 01:50:03,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:03,843 INFO L85 PathProgramCache]: Analyzing trace with hash -770352627, now seen corresponding path program 1 times [2021-11-07 01:50:03,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:50:03,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1788865097] [2021-11-07 01:50:03,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:03,844 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:50:03,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:50:03,846 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:50:03,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:50:04,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:04,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:50:04,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:04,440 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 01:50:04,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:04,574 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 01:50:04,574 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:50:04,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1788865097] [2021-11-07 01:50:04,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1788865097] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:50:04,575 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:50:04,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:50:04,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284965238] [2021-11-07 01:50:04,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:50:04,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:50:04,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:50:04,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:50:04,577 INFO L87 Difference]: Start difference. First operand 21144 states and 39825 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states 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 01:50:12,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:12,778 INFO L93 Difference]: Finished difference Result 177801 states and 335102 transitions. [2021-11-07 01:50:12,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:50:12,779 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-11-07 01:50:12,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:13,410 INFO L225 Difference]: With dead ends: 177801 [2021-11-07 01:50:13,410 INFO L226 Difference]: Without dead ends: 156727 [2021-11-07 01:50:13,464 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:50:13,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156727 states. [2021-11-07 01:50:16,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156727 to 39827. [2021-11-07 01:50:16,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39827 states, 39817 states have (on average 1.883592435391918) internal successors, (74999), 39826 states have internal predecessors, (74999), 0 states have call successors, (0), 0 states 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 01:50:17,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39827 states to 39827 states and 74999 transitions. [2021-11-07 01:50:17,026 INFO L78 Accepts]: Start accepts. Automaton has 39827 states and 74999 transitions. Word has length 38 [2021-11-07 01:50:17,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:17,028 INFO L470 AbstractCegarLoop]: Abstraction has 39827 states and 74999 transitions. [2021-11-07 01:50:17,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states 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 01:50:17,028 INFO L276 IsEmpty]: Start isEmpty. Operand 39827 states and 74999 transitions. [2021-11-07 01:50:17,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-07 01:50:17,029 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:17,030 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] [2021-11-07 01:50:17,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:17,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:50:17,245 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 01:50:17,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:17,245 INFO L85 PathProgramCache]: Analyzing trace with hash -93950583, now seen corresponding path program 1 times [2021-11-07 01:50:17,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:50:17,247 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1082138677] [2021-11-07 01:50:17,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:17,247 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:50:17,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:50:17,254 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:50:17,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:50:17,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:17,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:50:17,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:17,815 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 01:50:17,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:17,922 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 01:50:17,922 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:50:17,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1082138677] [2021-11-07 01:50:17,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1082138677] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:50:17,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:50:17,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:50:17,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36908860] [2021-11-07 01:50:17,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:50:17,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:50:17,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:50:17,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:50:17,926 INFO L87 Difference]: Start difference. First operand 39827 states and 74999 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states 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 01:50:21,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:21,249 INFO L93 Difference]: Finished difference Result 118321 states and 222803 transitions. [2021-11-07 01:50:21,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:50:21,250 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-11-07 01:50:21,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:21,473 INFO L225 Difference]: With dead ends: 118321 [2021-11-07 01:50:21,474 INFO L226 Difference]: Without dead ends: 78526 [2021-11-07 01:50:21,534 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 75 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 01:50:21,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78526 states. [2021-11-07 01:50:23,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78526 to 39703. [2021-11-07 01:50:23,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39703 states, 39693 states have (on average 1.8832287808933565) internal successors, (74751), 39702 states have internal predecessors, (74751), 0 states have call successors, (0), 0 states 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 01:50:23,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39703 states to 39703 states and 74751 transitions. [2021-11-07 01:50:23,542 INFO L78 Accepts]: Start accepts. Automaton has 39703 states and 74751 transitions. Word has length 39 [2021-11-07 01:50:23,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:23,543 INFO L470 AbstractCegarLoop]: Abstraction has 39703 states and 74751 transitions. [2021-11-07 01:50:23,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states 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 01:50:23,543 INFO L276 IsEmpty]: Start isEmpty. Operand 39703 states and 74751 transitions. [2021-11-07 01:50:23,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-07 01:50:23,544 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:23,544 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] [2021-11-07 01:50:23,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:23,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:50:23,760 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 01:50:23,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:23,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1958693158, now seen corresponding path program 1 times [2021-11-07 01:50:23,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:50:23,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [661512728] [2021-11-07 01:50:23,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:23,763 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:50:23,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:50:23,764 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:50:23,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:50:24,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:24,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:50:24,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:24,306 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 01:50:24,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:24,443 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 01:50:24,443 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:50:24,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [661512728] [2021-11-07 01:50:24,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [661512728] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:50:24,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:50:24,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:50:24,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658777794] [2021-11-07 01:50:24,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:50:24,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:50:24,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:50:24,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:50:24,445 INFO L87 Difference]: Start difference. First operand 39703 states and 74751 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 01:50:38,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:38,298 INFO L93 Difference]: Finished difference Result 150720 states and 283213 transitions. [2021-11-07 01:50:38,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:50:38,298 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 39 [2021-11-07 01:50:38,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:38,720 INFO L225 Difference]: With dead ends: 150720 [2021-11-07 01:50:38,720 INFO L226 Difference]: Without dead ends: 111051 [2021-11-07 01:50:38,805 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:50:38,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111051 states. [2021-11-07 01:50:41,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111051 to 77337. [2021-11-07 01:50:41,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77337 states, 77327 states have (on average 1.8666571831313772) internal successors, (144343), 77336 states have internal predecessors, (144343), 0 states have call successors, (0), 0 states 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 01:50:42,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77337 states to 77337 states and 144343 transitions. [2021-11-07 01:50:42,226 INFO L78 Accepts]: Start accepts. Automaton has 77337 states and 144343 transitions. Word has length 39 [2021-11-07 01:50:42,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:42,227 INFO L470 AbstractCegarLoop]: Abstraction has 77337 states and 144343 transitions. [2021-11-07 01:50:42,228 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 01:50:42,228 INFO L276 IsEmpty]: Start isEmpty. Operand 77337 states and 144343 transitions. [2021-11-07 01:50:42,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-07 01:50:42,230 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:42,232 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] [2021-11-07 01:50:42,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:42,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:50:42,454 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 01:50:42,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:42,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1970350501, now seen corresponding path program 1 times [2021-11-07 01:50:42,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:50:42,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1199337482] [2021-11-07 01:50:42,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:42,456 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:50:42,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:50:42,460 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:50:42,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9abf63f3-bb52-442c-8318-58632a339dd9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:50:42,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:42,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:50:42,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:43,007 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 01:50:43,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:43,125 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 01:50:43,125 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:50:43,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1199337482] [2021-11-07 01:50:43,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1199337482] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:50:43,125 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:50:43,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:50:43,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814061847] [2021-11-07 01:50:43,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:50:43,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:50:43,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:50:43,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:50:43,127 INFO L87 Difference]: Start difference. First operand 77337 states and 144343 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)