./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product25.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_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/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_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product25.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/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_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/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 680b86ee69d2fa1a591b34672ee94362515e8041606baf59201de5a19c705dd0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:18:21,352 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:18:21,355 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:18:21,385 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:18:21,386 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:18:21,387 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:18:21,389 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:18:21,391 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:18:21,394 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:18:21,395 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:18:21,396 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:18:21,398 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:18:21,398 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:18:21,400 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:18:21,401 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:18:21,403 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:18:21,404 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:18:21,405 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:18:21,408 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:18:21,410 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:18:21,413 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:18:21,414 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:18:21,416 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:18:21,417 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:18:21,420 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:18:21,421 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:18:21,421 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:18:21,422 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:18:21,423 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:18:21,424 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:18:21,425 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:18:21,426 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:18:21,427 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:18:21,428 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:18:21,429 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:18:21,430 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:18:21,431 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:18:21,431 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:18:21,432 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:18:21,433 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:18:21,434 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:18:21,435 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:18:21,468 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:18:21,468 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:18:21,469 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:18:21,470 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:18:21,470 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:18:21,470 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:18:21,470 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:18:21,471 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:18:21,471 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:18:21,472 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:18:21,472 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:18:21,473 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:18:21,474 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:18:21,474 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:18:21,474 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:18:21,475 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:18:21,476 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:18:21,476 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:18:21,476 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:18:21,477 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:18:21,477 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:18:21,477 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:18:21,477 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:18:21,478 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:18:21,478 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:18:21,478 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:18:21,479 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:18:21,479 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:18:21,479 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:18:21,480 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:18:21,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:18:21,480 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:18:21,481 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:18:21,481 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:18:21,481 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:18:21,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:18:21,482 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:18:21,482 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:18:21,482 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:18:21,483 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_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 680b86ee69d2fa1a591b34672ee94362515e8041606baf59201de5a19c705dd0 [2021-11-07 02:18:21,796 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:18:21,817 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:18:21,820 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:18:21,821 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:18:21,822 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:18:21,823 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec1_product25.cil.c [2021-11-07 02:18:21,891 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/data/aca0d6aff/2a2631ea73674ceb98735fff41d0955b/FLAGb03d634f5 [2021-11-07 02:18:22,569 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:18:22,576 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/sv-benchmarks/c/product-lines/elevator_spec1_product25.cil.c [2021-11-07 02:18:22,617 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/data/aca0d6aff/2a2631ea73674ceb98735fff41d0955b/FLAGb03d634f5 [2021-11-07 02:18:22,745 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/data/aca0d6aff/2a2631ea73674ceb98735fff41d0955b [2021-11-07 02:18:22,747 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:18:22,755 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:18:22,756 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:18:22,756 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:18:22,760 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:18:22,761 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:18:22" (1/1) ... [2021-11-07 02:18:22,762 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56947cbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:22, skipping insertion in model container [2021-11-07 02:18:22,762 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:18:22" (1/1) ... [2021-11-07 02:18:22,769 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:18:22,846 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:18:23,200 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_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/sv-benchmarks/c/product-lines/elevator_spec1_product25.cil.c[13407,13420] [2021-11-07 02:18:23,510 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:18:23,528 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 02:18:23,529 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@376443d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:23, skipping insertion in model container [2021-11-07 02:18:23,529 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:18:23,530 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:18:23,532 INFO L168 Benchmark]: Toolchain (without parser) took 775.87 ms. Allocated memory is still 100.7 MB. Free memory was 78.0 MB in the beginning and 51.7 MB in the end (delta: 26.2 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. [2021-11-07 02:18:23,534 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 83.9 MB. Free memory was 57.5 MB in the beginning and 57.4 MB in the end (delta: 78.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:18:23,536 INFO L168 Benchmark]: CACSL2BoogieTranslator took 773.32 ms. Allocated memory is still 100.7 MB. Free memory was 79.0 MB in the beginning and 52.3 MB in the end (delta: 26.7 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2021-11-07 02:18:23,538 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 83.9 MB. Free memory was 57.5 MB in the beginning and 57.4 MB in the end (delta: 78.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 773.32 ms. Allocated memory is still 100.7 MB. Free memory was 79.0 MB in the beginning and 52.3 MB in the end (delta: 26.7 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 115]: 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_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/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_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product25.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/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_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/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 680b86ee69d2fa1a591b34672ee94362515e8041606baf59201de5a19c705dd0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:18:25,722 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:18:25,726 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:18:25,774 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:18:25,774 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:18:25,776 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:18:25,777 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:18:25,780 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:18:25,782 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:18:25,783 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:18:25,785 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:18:25,786 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:18:25,786 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:18:25,788 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:18:25,789 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:18:25,791 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:18:25,792 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:18:25,793 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:18:25,795 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:18:25,803 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:18:25,806 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:18:25,808 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:18:25,809 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:18:25,810 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:18:25,814 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:18:25,815 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:18:25,815 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:18:25,816 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:18:25,817 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:18:25,818 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:18:25,818 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:18:25,819 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:18:25,824 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:18:25,826 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:18:25,830 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:18:25,830 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:18:25,831 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:18:25,832 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:18:25,832 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:18:25,834 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:18:25,835 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:18:25,842 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:18:25,877 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:18:25,877 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:18:25,878 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:18:25,878 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:18:25,879 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:18:25,879 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:18:25,879 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:18:25,879 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:18:25,879 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:18:25,880 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:18:25,881 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:18:25,881 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:18:25,881 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:18:25,881 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:18:25,881 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:18:25,882 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:18:25,882 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:18:25,882 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:18:25,882 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:18:25,882 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:18:25,883 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:18:25,883 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:18:25,883 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:18:25,883 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:18:25,883 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:18:25,884 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:18:25,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:18:25,886 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:18:25,887 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:18:25,887 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:18:25,888 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:18:25,888 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:18:25,888 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:18:25,888 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:18:25,889 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:18:25,889 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_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 680b86ee69d2fa1a591b34672ee94362515e8041606baf59201de5a19c705dd0 [2021-11-07 02:18:26,302 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:18:26,324 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:18:26,327 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:18:26,328 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:18:26,329 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:18:26,330 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec1_product25.cil.c [2021-11-07 02:18:26,400 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/data/59163db95/188d8d9b49ab40c28cbac647aa7a8097/FLAGdfa071de7 [2021-11-07 02:18:27,112 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:18:27,113 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/sv-benchmarks/c/product-lines/elevator_spec1_product25.cil.c [2021-11-07 02:18:27,134 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/data/59163db95/188d8d9b49ab40c28cbac647aa7a8097/FLAGdfa071de7 [2021-11-07 02:18:27,256 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/data/59163db95/188d8d9b49ab40c28cbac647aa7a8097 [2021-11-07 02:18:27,258 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:18:27,259 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:18:27,262 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:18:27,262 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:18:27,269 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:18:27,270 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:18:27" (1/1) ... [2021-11-07 02:18:27,272 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1726f889 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:27, skipping insertion in model container [2021-11-07 02:18:27,272 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:18:27" (1/1) ... [2021-11-07 02:18:27,281 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:18:27,373 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:18:27,808 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_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/sv-benchmarks/c/product-lines/elevator_spec1_product25.cil.c[13407,13420] [2021-11-07 02:18:28,165 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:18:28,196 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:18:28,219 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:18:28,264 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_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/sv-benchmarks/c/product-lines/elevator_spec1_product25.cil.c[13407,13420] [2021-11-07 02:18:28,378 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:18:28,390 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:18:28,431 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_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/sv-benchmarks/c/product-lines/elevator_spec1_product25.cil.c[13407,13420] [2021-11-07 02:18:28,523 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:18:28,569 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:18:28,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:28 WrapperNode [2021-11-07 02:18:28,570 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:18:28,572 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:18:28,572 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:18:28,572 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:18:28,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:28" (1/1) ... [2021-11-07 02:18:28,660 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:28" (1/1) ... [2021-11-07 02:18:28,869 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:18:28,869 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:18:28,870 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:18:28,870 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:18:28,878 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:28" (1/1) ... [2021-11-07 02:18:28,878 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:28" (1/1) ... [2021-11-07 02:18:28,898 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:28" (1/1) ... [2021-11-07 02:18:28,899 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:28" (1/1) ... [2021-11-07 02:18:29,001 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:28" (1/1) ... [2021-11-07 02:18:29,061 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:28" (1/1) ... [2021-11-07 02:18:29,077 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:28" (1/1) ... [2021-11-07 02:18:29,118 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:18:29,119 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:18:29,119 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:18:29,119 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:18:29,120 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:28" (1/1) ... [2021-11-07 02:18:29,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:18:29,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:18:29,149 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:18:29,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:18:29,198 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:18:29,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:18:29,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:18:29,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:18:38,492 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:18:38,493 INFO L299 CfgBuilder]: Removed 589 assume(true) statements. [2021-11-07 02:18:38,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:18:38 BoogieIcfgContainer [2021-11-07 02:18:38,501 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:18:38,503 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:18:38,503 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:18:38,506 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:18:38,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:18:27" (1/3) ... [2021-11-07 02:18:38,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c045576 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:18:38, skipping insertion in model container [2021-11-07 02:18:38,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:28" (2/3) ... [2021-11-07 02:18:38,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c045576 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:18:38, skipping insertion in model container [2021-11-07 02:18:38,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:18:38" (3/3) ... [2021-11-07 02:18:38,512 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product25.cil.c [2021-11-07 02:18:38,521 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:18:38,521 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 02:18:38,588 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:18:38,594 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 02:18:38,594 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 02:18:38,669 INFO L276 IsEmpty]: Start isEmpty. Operand has 2511 states, 2505 states have (on average 1.8890219560878243) internal successors, (4732), 2510 states have internal predecessors, (4732), 0 states have call successors, (0), 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 02:18:38,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 02:18:38,694 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:38,694 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:38,695 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:18:38,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:38,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1148200267, now seen corresponding path program 1 times [2021-11-07 02:18:38,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:38,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [667537436] [2021-11-07 02:18:38,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:38,719 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:38,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:38,736 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:38,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:18:39,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:39,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:18:39,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:39,395 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 02:18:39,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:39,482 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 02:18:39,483 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:39,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [667537436] [2021-11-07 02:18:39,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [667537436] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:39,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:39,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:18:39,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902413709] [2021-11-07 02:18:39,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:18:39,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:39,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:18:39,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:18:39,515 INFO L87 Difference]: Start difference. First operand has 2511 states, 2505 states have (on average 1.8890219560878243) internal successors, (4732), 2510 states have internal predecessors, (4732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 23.5) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:39,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:39,670 INFO L93 Difference]: Finished difference Result 2530 states and 4755 transitions. [2021-11-07 02:18:39,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:18:39,671 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 23.5) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-07 02:18:39,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:39,713 INFO L225 Difference]: With dead ends: 2530 [2021-11-07 02:18:39,714 INFO L226 Difference]: Without dead ends: 2507 [2021-11-07 02:18:39,719 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:18:39,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2021-11-07 02:18:39,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 2507. [2021-11-07 02:18:39,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2507 states, 2502 states have (on average 1.8864908073541167) internal successors, (4720), 2506 states have internal predecessors, (4720), 0 states have call successors, (0), 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 02:18:39,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2507 states to 2507 states and 4720 transitions. [2021-11-07 02:18:39,893 INFO L78 Accepts]: Start accepts. Automaton has 2507 states and 4720 transitions. Word has length 47 [2021-11-07 02:18:39,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:39,894 INFO L470 AbstractCegarLoop]: Abstraction has 2507 states and 4720 transitions. [2021-11-07 02:18:39,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 23.5) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:39,894 INFO L276 IsEmpty]: Start isEmpty. Operand 2507 states and 4720 transitions. [2021-11-07 02:18:39,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 02:18:39,913 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:39,913 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:39,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:40,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:40,127 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:18:40,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:40,128 INFO L85 PathProgramCache]: Analyzing trace with hash -861995279, now seen corresponding path program 1 times [2021-11-07 02:18:40,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:40,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [544438880] [2021-11-07 02:18:40,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:40,130 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:40,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:40,134 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:40,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:18:40,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:40,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:18:40,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:40,675 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 02:18:40,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:40,866 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 02:18:40,867 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:40,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [544438880] [2021-11-07 02:18:40,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [544438880] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:40,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:40,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:18:40,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746912203] [2021-11-07 02:18:40,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:18:40,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:40,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:18:40,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:18:40,871 INFO L87 Difference]: Start difference. First operand 2507 states and 4720 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:41,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:41,239 INFO L93 Difference]: Finished difference Result 7441 states and 14017 transitions. [2021-11-07 02:18:41,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:18:41,240 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-07 02:18:41,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:41,275 INFO L225 Difference]: With dead ends: 7441 [2021-11-07 02:18:41,276 INFO L226 Difference]: Without dead ends: 4947 [2021-11-07 02:18:41,285 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:18:41,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4947 states. [2021-11-07 02:18:41,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4947 to 2507. [2021-11-07 02:18:41,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2507 states, 2502 states have (on average 1.8836930455635492) internal successors, (4713), 2506 states have internal predecessors, (4713), 0 states have call successors, (0), 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 02:18:41,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2507 states to 2507 states and 4713 transitions. [2021-11-07 02:18:41,414 INFO L78 Accepts]: Start accepts. Automaton has 2507 states and 4713 transitions. Word has length 49 [2021-11-07 02:18:41,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:41,415 INFO L470 AbstractCegarLoop]: Abstraction has 2507 states and 4713 transitions. [2021-11-07 02:18:41,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:41,416 INFO L276 IsEmpty]: Start isEmpty. Operand 2507 states and 4713 transitions. [2021-11-07 02:18:41,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 02:18:41,424 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:41,430 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:41,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:41,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:41,649 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:18:41,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:41,650 INFO L85 PathProgramCache]: Analyzing trace with hash 64941902, now seen corresponding path program 1 times [2021-11-07 02:18:41,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:41,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [640175403] [2021-11-07 02:18:41,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:41,652 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:41,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:41,656 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:41,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:18:41,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:42,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:18:42,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:42,208 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 02:18:42,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:42,402 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 02:18:42,403 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:42,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [640175403] [2021-11-07 02:18:42,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [640175403] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:42,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:42,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:18:42,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116035679] [2021-11-07 02:18:42,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:18:42,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:42,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:18:42,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:18:42,406 INFO L87 Difference]: Start difference. First operand 2507 states and 4713 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:43,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:43,655 INFO L93 Difference]: Finished difference Result 17024 states and 32043 transitions. [2021-11-07 02:18:43,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:18:43,655 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-07 02:18:43,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:43,797 INFO L225 Difference]: With dead ends: 17024 [2021-11-07 02:18:43,797 INFO L226 Difference]: Without dead ends: 14539 [2021-11-07 02:18:43,805 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:18:43,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14539 states. [2021-11-07 02:18:44,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14539 to 2485. [2021-11-07 02:18:44,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2485 states, 2480 states have (on average 1.8798387096774194) internal successors, (4662), 2484 states have internal predecessors, (4662), 0 states have call successors, (0), 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 02:18:44,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2485 states to 2485 states and 4662 transitions. [2021-11-07 02:18:44,155 INFO L78 Accepts]: Start accepts. Automaton has 2485 states and 4662 transitions. Word has length 55 [2021-11-07 02:18:44,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:44,156 INFO L470 AbstractCegarLoop]: Abstraction has 2485 states and 4662 transitions. [2021-11-07 02:18:44,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:44,157 INFO L276 IsEmpty]: Start isEmpty. Operand 2485 states and 4662 transitions. [2021-11-07 02:18:44,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 02:18:44,160 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:44,160 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:44,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:44,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:44,379 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:18:44,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:44,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1682170671, now seen corresponding path program 1 times [2021-11-07 02:18:44,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:44,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [113453747] [2021-11-07 02:18:44,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:44,384 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:44,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:44,385 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:44,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:18:44,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:44,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:18:44,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:45,091 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 02:18:45,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:45,315 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 02:18:45,316 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:45,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [113453747] [2021-11-07 02:18:45,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [113453747] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:45,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:45,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:18:45,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980049433] [2021-11-07 02:18:45,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:18:45,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:45,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:18:45,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:18:45,321 INFO L87 Difference]: Start difference. First operand 2485 states and 4662 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:45,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:45,862 INFO L93 Difference]: Finished difference Result 7352 states and 13821 transitions. [2021-11-07 02:18:45,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:18:45,862 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-07 02:18:45,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:45,878 INFO L225 Difference]: With dead ends: 7352 [2021-11-07 02:18:45,879 INFO L226 Difference]: Without dead ends: 4889 [2021-11-07 02:18:45,885 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:18:45,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4889 states. [2021-11-07 02:18:46,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4889 to 2485. [2021-11-07 02:18:46,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2485 states, 2480 states have (on average 1.8754032258064517) internal successors, (4651), 2484 states have internal predecessors, (4651), 0 states have call successors, (0), 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 02:18:46,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2485 states to 2485 states and 4651 transitions. [2021-11-07 02:18:46,080 INFO L78 Accepts]: Start accepts. Automaton has 2485 states and 4651 transitions. Word has length 57 [2021-11-07 02:18:46,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:46,082 INFO L470 AbstractCegarLoop]: Abstraction has 2485 states and 4651 transitions. [2021-11-07 02:18:46,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:46,083 INFO L276 IsEmpty]: Start isEmpty. Operand 2485 states and 4651 transitions. [2021-11-07 02:18:46,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 02:18:46,087 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:46,087 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:46,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:46,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:46,309 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:18:46,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:46,309 INFO L85 PathProgramCache]: Analyzing trace with hash -2068779196, now seen corresponding path program 1 times [2021-11-07 02:18:46,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:46,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1709655385] [2021-11-07 02:18:46,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:46,312 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:46,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:46,313 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:46,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:18:46,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:46,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 02:18:46,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:47,070 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 02:18:47,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:47,310 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 02:18:47,310 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:47,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1709655385] [2021-11-07 02:18:47,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1709655385] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:47,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:47,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:18:47,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954623247] [2021-11-07 02:18:47,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:18:47,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:47,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:18:47,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:18:47,314 INFO L87 Difference]: Start difference. First operand 2485 states and 4651 transitions. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:49,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:49,921 INFO L93 Difference]: Finished difference Result 26579 states and 49995 transitions. [2021-11-07 02:18:49,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:18:49,921 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-07 02:18:49,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:50,012 INFO L225 Difference]: With dead ends: 26579 [2021-11-07 02:18:50,013 INFO L226 Difference]: Without dead ends: 24119 [2021-11-07 02:18:50,026 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:18:50,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24119 states. [2021-11-07 02:18:50,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24119 to 2487. [2021-11-07 02:18:50,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2482 states have (on average 1.8726833199033037) internal successors, (4648), 2486 states have internal predecessors, (4648), 0 states have call successors, (0), 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 02:18:50,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 4648 transitions. [2021-11-07 02:18:50,436 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 4648 transitions. Word has length 63 [2021-11-07 02:18:50,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:50,437 INFO L470 AbstractCegarLoop]: Abstraction has 2487 states and 4648 transitions. [2021-11-07 02:18:50,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:50,438 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 4648 transitions. [2021-11-07 02:18:50,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 02:18:50,441 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:50,441 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:50,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:50,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:50,657 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:18:50,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:50,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1620739799, now seen corresponding path program 1 times [2021-11-07 02:18:50,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:50,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [257483245] [2021-11-07 02:18:50,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:50,659 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:50,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:50,660 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:50,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:18:51,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:51,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:18:51,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:51,421 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 02:18:51,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:51,636 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 02:18:51,636 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:51,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [257483245] [2021-11-07 02:18:51,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [257483245] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:51,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:51,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:18:51,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565248162] [2021-11-07 02:18:51,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:18:51,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:51,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:18:51,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:18:51,639 INFO L87 Difference]: Start difference. First operand 2487 states and 4648 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:53,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:53,977 INFO L93 Difference]: Finished difference Result 26547 states and 49916 transitions. [2021-11-07 02:18:53,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:18:53,978 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 02:18:53,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:54,039 INFO L225 Difference]: With dead ends: 26547 [2021-11-07 02:18:54,039 INFO L226 Difference]: Without dead ends: 24087 [2021-11-07 02:18:54,049 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:18:54,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24087 states. [2021-11-07 02:18:54,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24087 to 2491. [2021-11-07 02:18:54,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2491 states, 2486 states have (on average 1.8708769106999195) internal successors, (4651), 2490 states have internal predecessors, (4651), 0 states have call successors, (0), 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 02:18:54,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2491 states to 2491 states and 4651 transitions. [2021-11-07 02:18:54,333 INFO L78 Accepts]: Start accepts. Automaton has 2491 states and 4651 transitions. Word has length 65 [2021-11-07 02:18:54,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:54,334 INFO L470 AbstractCegarLoop]: Abstraction has 2491 states and 4651 transitions. [2021-11-07 02:18:54,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:54,335 INFO L276 IsEmpty]: Start isEmpty. Operand 2491 states and 4651 transitions. [2021-11-07 02:18:54,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 02:18:54,337 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:54,337 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:54,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:54,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:54,552 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:18:54,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:54,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1828928572, now seen corresponding path program 1 times [2021-11-07 02:18:54,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:54,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [747960973] [2021-11-07 02:18:54,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:54,554 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:54,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:54,555 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:54,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:18:54,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:55,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:18:55,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:55,192 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 02:18:55,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:55,370 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 02:18:55,370 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:55,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [747960973] [2021-11-07 02:18:55,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [747960973] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:55,371 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:55,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:18:55,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476380708] [2021-11-07 02:18:55,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:18:55,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:55,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:18:55,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:18:55,373 INFO L87 Difference]: Start difference. First operand 2491 states and 4651 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:55,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:55,564 INFO L93 Difference]: Finished difference Result 4930 states and 9233 transitions. [2021-11-07 02:18:55,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:18:55,565 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 02:18:55,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:55,572 INFO L225 Difference]: With dead ends: 4930 [2021-11-07 02:18:55,572 INFO L226 Difference]: Without dead ends: 2470 [2021-11-07 02:18:55,577 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:18:55,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-11-07 02:18:55,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 2470. [2021-11-07 02:18:55,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2470 states, 2465 states have (on average 1.8713995943204869) internal successors, (4613), 2469 states have internal predecessors, (4613), 0 states have call successors, (0), 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 02:18:55,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2470 states to 2470 states and 4613 transitions. [2021-11-07 02:18:55,751 INFO L78 Accepts]: Start accepts. Automaton has 2470 states and 4613 transitions. Word has length 67 [2021-11-07 02:18:55,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:55,751 INFO L470 AbstractCegarLoop]: Abstraction has 2470 states and 4613 transitions. [2021-11-07 02:18:55,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:55,752 INFO L276 IsEmpty]: Start isEmpty. Operand 2470 states and 4613 transitions. [2021-11-07 02:18:55,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 02:18:55,754 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:55,755 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:55,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:55,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:55,972 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:18:55,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:55,972 INFO L85 PathProgramCache]: Analyzing trace with hash -781902308, now seen corresponding path program 1 times [2021-11-07 02:18:55,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:55,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2008897407] [2021-11-07 02:18:55,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:55,973 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:55,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:55,975 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:56,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:18:56,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:56,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:18:56,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:56,871 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 02:18:56,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:57,073 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 02:18:57,074 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:57,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2008897407] [2021-11-07 02:18:57,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2008897407] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:57,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:57,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:18:57,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946995982] [2021-11-07 02:18:57,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:18:57,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:57,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:18:57,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:18:57,076 INFO L87 Difference]: Start difference. First operand 2470 states and 4613 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:57,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:57,308 INFO L93 Difference]: Finished difference Result 4874 states and 9136 transitions. [2021-11-07 02:18:57,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:18:57,308 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 02:18:57,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:57,315 INFO L225 Difference]: With dead ends: 4874 [2021-11-07 02:18:57,315 INFO L226 Difference]: Without dead ends: 2445 [2021-11-07 02:18:57,321 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:18:57,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2445 states. [2021-11-07 02:18:57,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2445 to 2445. [2021-11-07 02:18:57,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2445 states, 2440 states have (on average 1.8725409836065574) internal successors, (4569), 2444 states have internal predecessors, (4569), 0 states have call successors, (0), 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 02:18:57,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2445 states to 2445 states and 4569 transitions. [2021-11-07 02:18:57,489 INFO L78 Accepts]: Start accepts. Automaton has 2445 states and 4569 transitions. Word has length 68 [2021-11-07 02:18:57,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:57,490 INFO L470 AbstractCegarLoop]: Abstraction has 2445 states and 4569 transitions. [2021-11-07 02:18:57,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:57,491 INFO L276 IsEmpty]: Start isEmpty. Operand 2445 states and 4569 transitions. [2021-11-07 02:18:57,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 02:18:57,494 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:57,494 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:57,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:57,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:57,713 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:18:57,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:57,713 INFO L85 PathProgramCache]: Analyzing trace with hash -454138061, now seen corresponding path program 1 times [2021-11-07 02:18:57,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:57,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1849649133] [2021-11-07 02:18:57,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:57,715 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:57,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:57,716 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:57,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:18:58,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:58,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:18:58,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:58,437 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 02:18:58,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:58,611 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 02:18:58,611 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:58,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1849649133] [2021-11-07 02:18:58,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1849649133] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:58,611 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:58,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:18:58,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698064717] [2021-11-07 02:18:58,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:18:58,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:58,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:18:58,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:18:58,613 INFO L87 Difference]: Start difference. First operand 2445 states and 4569 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:58,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:58,747 INFO L93 Difference]: Finished difference Result 4849 states and 9092 transitions. [2021-11-07 02:18:58,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:18:58,747 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 02:18:58,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:58,752 INFO L225 Difference]: With dead ends: 4849 [2021-11-07 02:18:58,752 INFO L226 Difference]: Without dead ends: 2442 [2021-11-07 02:18:58,756 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:18:58,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2021-11-07 02:18:58,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2442. [2021-11-07 02:18:58,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2442 states, 2437 states have (on average 1.8715633976200245) internal successors, (4561), 2441 states have internal predecessors, (4561), 0 states have call successors, (0), 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 02:18:58,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2442 states to 2442 states and 4561 transitions. [2021-11-07 02:18:58,927 INFO L78 Accepts]: Start accepts. Automaton has 2442 states and 4561 transitions. Word has length 69 [2021-11-07 02:18:58,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:58,928 INFO L470 AbstractCegarLoop]: Abstraction has 2442 states and 4561 transitions. [2021-11-07 02:18:58,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:58,928 INFO L276 IsEmpty]: Start isEmpty. Operand 2442 states and 4561 transitions. [2021-11-07 02:18:58,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 02:18:58,937 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:58,937 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:58,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:59,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:59,153 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:18:59,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:59,154 INFO L85 PathProgramCache]: Analyzing trace with hash -528043870, now seen corresponding path program 1 times [2021-11-07 02:18:59,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:59,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [212908864] [2021-11-07 02:18:59,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:59,155 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:59,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:59,155 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:59,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:18:59,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:59,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 02:18:59,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:59,927 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 02:18:59,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:00,134 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 02:19:00,134 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:00,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [212908864] [2021-11-07 02:19:00,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [212908864] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:00,135 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:19:00,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:19:00,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997002541] [2021-11-07 02:19:00,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:19:00,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:00,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:19:00,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:19:00,136 INFO L87 Difference]: Start difference. First operand 2442 states and 4561 transitions. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 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 02:19:00,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:00,348 INFO L93 Difference]: Finished difference Result 4840 states and 9074 transitions. [2021-11-07 02:19:00,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:19:00,348 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 02:19:00,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:00,352 INFO L225 Difference]: With dead ends: 4840 [2021-11-07 02:19:00,352 INFO L226 Difference]: Without dead ends: 2440 [2021-11-07 02:19:00,355 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:19:00,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2440 states. [2021-11-07 02:19:00,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2440 to 2440. [2021-11-07 02:19:00,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2440 states, 2435 states have (on average 1.8706365503080082) internal successors, (4555), 2439 states have internal predecessors, (4555), 0 states have call successors, (0), 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 02:19:00,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2440 states to 2440 states and 4555 transitions. [2021-11-07 02:19:00,511 INFO L78 Accepts]: Start accepts. Automaton has 2440 states and 4555 transitions. Word has length 70 [2021-11-07 02:19:00,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:00,512 INFO L470 AbstractCegarLoop]: Abstraction has 2440 states and 4555 transitions. [2021-11-07 02:19:00,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 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 02:19:00,512 INFO L276 IsEmpty]: Start isEmpty. Operand 2440 states and 4555 transitions. [2021-11-07 02:19:00,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 02:19:00,515 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:00,515 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:19:00,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:19:00,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:19:00,729 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:19:00,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:00,730 INFO L85 PathProgramCache]: Analyzing trace with hash 667654126, now seen corresponding path program 1 times [2021-11-07 02:19:00,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:00,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [970527480] [2021-11-07 02:19:00,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:00,731 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:00,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:00,732 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:00,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:19:01,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:01,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:19:01,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:01,506 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 02:19:01,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:01,682 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 02:19:01,682 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:01,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [970527480] [2021-11-07 02:19:01,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [970527480] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:01,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:19:01,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:19:01,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316817833] [2021-11-07 02:19:01,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:19:01,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:01,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:19:01,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:19:01,684 INFO L87 Difference]: Start difference. First operand 2440 states and 4555 transitions. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 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 02:19:01,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:01,877 INFO L93 Difference]: Finished difference Result 4833 states and 9059 transitions. [2021-11-07 02:19:01,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:19:01,877 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 02:19:01,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:01,880 INFO L225 Difference]: With dead ends: 4833 [2021-11-07 02:19:01,880 INFO L226 Difference]: Without dead ends: 2438 [2021-11-07 02:19:01,883 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:19:01,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2438 states. [2021-11-07 02:19:02,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2438 to 2438. [2021-11-07 02:19:02,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2438 states, 2433 states have (on average 1.8697081792026304) internal successors, (4549), 2437 states have internal predecessors, (4549), 0 states have call successors, (0), 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 02:19:02,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2438 states to 2438 states and 4549 transitions. [2021-11-07 02:19:02,071 INFO L78 Accepts]: Start accepts. Automaton has 2438 states and 4549 transitions. Word has length 71 [2021-11-07 02:19:02,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:02,071 INFO L470 AbstractCegarLoop]: Abstraction has 2438 states and 4549 transitions. [2021-11-07 02:19:02,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 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 02:19:02,071 INFO L276 IsEmpty]: Start isEmpty. Operand 2438 states and 4549 transitions. [2021-11-07 02:19:02,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 02:19:02,074 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:02,075 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:19:02,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:19:02,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:19:02,294 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:19:02,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:02,294 INFO L85 PathProgramCache]: Analyzing trace with hash 784818637, now seen corresponding path program 1 times [2021-11-07 02:19:02,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:02,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [359734395] [2021-11-07 02:19:02,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:02,295 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:02,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:02,296 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:02,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:19:02,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:02,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:19:02,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:03,220 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 02:19:03,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:03,482 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 02:19:03,482 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:03,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [359734395] [2021-11-07 02:19:03,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [359734395] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:03,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:19:03,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:19:03,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065561334] [2021-11-07 02:19:03,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:19:03,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:03,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:19:03,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:19:03,484 INFO L87 Difference]: Start difference. First operand 2438 states and 4549 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:05,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:05,690 INFO L93 Difference]: Finished difference Result 9748 states and 18233 transitions. [2021-11-07 02:19:05,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:19:05,691 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 02:19:05,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:05,702 INFO L225 Difference]: With dead ends: 9748 [2021-11-07 02:19:05,702 INFO L226 Difference]: Without dead ends: 7370 [2021-11-07 02:19:05,707 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:19:05,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7370 states. [2021-11-07 02:19:05,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7370 to 2442. [2021-11-07 02:19:05,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2442 states, 2437 states have (on average 1.8682806729585557) internal successors, (4553), 2441 states have internal predecessors, (4553), 0 states have call successors, (0), 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 02:19:06,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2442 states to 2442 states and 4553 transitions. [2021-11-07 02:19:06,002 INFO L78 Accepts]: Start accepts. Automaton has 2442 states and 4553 transitions. Word has length 72 [2021-11-07 02:19:06,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:06,003 INFO L470 AbstractCegarLoop]: Abstraction has 2442 states and 4553 transitions. [2021-11-07 02:19:06,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:06,003 INFO L276 IsEmpty]: Start isEmpty. Operand 2442 states and 4553 transitions. [2021-11-07 02:19:06,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 02:19:06,008 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:06,008 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:19:06,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:19:06,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:19:06,226 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:19:06,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:06,226 INFO L85 PathProgramCache]: Analyzing trace with hash -631604357, now seen corresponding path program 1 times [2021-11-07 02:19:06,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:06,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [770334621] [2021-11-07 02:19:06,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:06,228 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:06,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:06,229 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:06,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:19:07,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:07,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:19:07,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:07,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:19:07,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:07,403 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 02:19:07,403 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:07,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [770334621] [2021-11-07 02:19:07,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [770334621] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:07,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:19:07,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 02:19:07,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194200751] [2021-11-07 02:19:07,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:19:07,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:07,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:19:07,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:19:07,406 INFO L87 Difference]: Start difference. First operand 2442 states and 4553 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:15,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:15,814 INFO L93 Difference]: Finished difference Result 6599 states and 12288 transitions. [2021-11-07 02:19:15,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:19:15,815 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 02:19:15,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:15,821 INFO L225 Difference]: With dead ends: 6599 [2021-11-07 02:19:15,821 INFO L226 Difference]: Without dead ends: 5199 [2021-11-07 02:19:15,823 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:19:15,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5199 states. [2021-11-07 02:19:16,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5199 to 4508. [2021-11-07 02:19:16,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4508 states, 4503 states have (on average 1.873639795691761) internal successors, (8437), 4507 states have internal predecessors, (8437), 0 states have call successors, (0), 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 02:19:16,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4508 states to 4508 states and 8437 transitions. [2021-11-07 02:19:16,169 INFO L78 Accepts]: Start accepts. Automaton has 4508 states and 8437 transitions. Word has length 73 [2021-11-07 02:19:16,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:16,170 INFO L470 AbstractCegarLoop]: Abstraction has 4508 states and 8437 transitions. [2021-11-07 02:19:16,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:16,170 INFO L276 IsEmpty]: Start isEmpty. Operand 4508 states and 8437 transitions. [2021-11-07 02:19:16,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 02:19:16,174 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:16,175 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:19:16,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:19:16,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:19:16,388 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:19:16,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:16,389 INFO L85 PathProgramCache]: Analyzing trace with hash -527998313, now seen corresponding path program 1 times [2021-11-07 02:19:16,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:16,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [914034933] [2021-11-07 02:19:16,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:16,390 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:16,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:16,391 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:16,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:19:16,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:16,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:19:16,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:17,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:19:17,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:17,402 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 02:19:17,403 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:17,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [914034933] [2021-11-07 02:19:17,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [914034933] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:17,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:19:17,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:19:17,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453878691] [2021-11-07 02:19:17,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:19:17,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:17,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:19:17,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:19:17,405 INFO L87 Difference]: Start difference. First operand 4508 states and 8437 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:18,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:18,919 INFO L93 Difference]: Finished difference Result 8434 states and 15698 transitions. [2021-11-07 02:19:18,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:19:18,919 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 02:19:18,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:18,926 INFO L225 Difference]: With dead ends: 8434 [2021-11-07 02:19:18,926 INFO L226 Difference]: Without dead ends: 4960 [2021-11-07 02:19:18,930 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:19:18,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4960 states. [2021-11-07 02:19:19,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4960 to 4411. [2021-11-07 02:19:19,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4411 states, 4406 states have (on average 1.8572401270994099) internal successors, (8183), 4410 states have internal predecessors, (8183), 0 states have call successors, (0), 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 02:19:19,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4411 states to 4411 states and 8183 transitions. [2021-11-07 02:19:19,170 INFO L78 Accepts]: Start accepts. Automaton has 4411 states and 8183 transitions. Word has length 74 [2021-11-07 02:19:19,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:19,170 INFO L470 AbstractCegarLoop]: Abstraction has 4411 states and 8183 transitions. [2021-11-07 02:19:19,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:19,171 INFO L276 IsEmpty]: Start isEmpty. Operand 4411 states and 8183 transitions. [2021-11-07 02:19:19,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 02:19:19,173 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:19,173 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:19:19,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-07 02:19:19,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:19:19,409 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:19:19,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:19,409 INFO L85 PathProgramCache]: Analyzing trace with hash -2067897629, now seen corresponding path program 1 times [2021-11-07 02:19:19,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:19,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2019677913] [2021-11-07 02:19:19,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:19,410 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:19,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:19,411 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:19,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:19:20,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:20,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:19:20,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:20,418 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 02:19:20,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:20,640 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 02:19:20,640 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:20,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2019677913] [2021-11-07 02:19:20,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2019677913] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:20,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:19:20,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:19:20,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113337611] [2021-11-07 02:19:20,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:19:20,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:20,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:19:20,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:19:20,643 INFO L87 Difference]: Start difference. First operand 4411 states and 8183 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:22,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:22,207 INFO L93 Difference]: Finished difference Result 31284 states and 58362 transitions. [2021-11-07 02:19:22,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:19:22,208 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 02:19:22,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:22,244 INFO L225 Difference]: With dead ends: 31284 [2021-11-07 02:19:22,244 INFO L226 Difference]: Without dead ends: 26929 [2021-11-07 02:19:22,252 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 145 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 02:19:22,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26929 states. [2021-11-07 02:19:22,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26929 to 8226. [2021-11-07 02:19:22,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8226 states, 8221 states have (on average 1.8633986133073834) internal successors, (15319), 8225 states have internal predecessors, (15319), 0 states have call successors, (0), 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 02:19:22,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8226 states to 8226 states and 15319 transitions. [2021-11-07 02:19:22,842 INFO L78 Accepts]: Start accepts. Automaton has 8226 states and 15319 transitions. Word has length 75 [2021-11-07 02:19:22,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:22,842 INFO L470 AbstractCegarLoop]: Abstraction has 8226 states and 15319 transitions. [2021-11-07 02:19:22,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:22,842 INFO L276 IsEmpty]: Start isEmpty. Operand 8226 states and 15319 transitions. [2021-11-07 02:19:22,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 02:19:22,844 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:22,845 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:19:22,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-07 02:19:23,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:19:23,061 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:19:23,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:23,061 INFO L85 PathProgramCache]: Analyzing trace with hash 2093056161, now seen corresponding path program 1 times [2021-11-07 02:19:23,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:23,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [571911533] [2021-11-07 02:19:23,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:23,062 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:23,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:23,063 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:23,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:19:23,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:23,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:19:23,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:24,106 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 02:19:24,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:24,363 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 02:19:24,363 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:24,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [571911533] [2021-11-07 02:19:24,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [571911533] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:24,364 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:19:24,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:19:24,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717823085] [2021-11-07 02:19:24,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:19:24,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:24,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:19:24,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:19:24,367 INFO L87 Difference]: Start difference. First operand 8226 states and 15319 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:25,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:25,697 INFO L93 Difference]: Finished difference Result 24955 states and 46541 transitions. [2021-11-07 02:19:25,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:19:25,698 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 02:19:25,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:25,724 INFO L225 Difference]: With dead ends: 24955 [2021-11-07 02:19:25,724 INFO L226 Difference]: Without dead ends: 20255 [2021-11-07 02:19:25,734 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:19:25,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20255 states. [2021-11-07 02:19:26,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20255 to 12657. [2021-11-07 02:19:26,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12657 states, 12652 states have (on average 1.8646063863420803) internal successors, (23591), 12656 states have internal predecessors, (23591), 0 states have call successors, (0), 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 02:19:26,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12657 states to 12657 states and 23591 transitions. [2021-11-07 02:19:26,527 INFO L78 Accepts]: Start accepts. Automaton has 12657 states and 23591 transitions. Word has length 75 [2021-11-07 02:19:26,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:26,527 INFO L470 AbstractCegarLoop]: Abstraction has 12657 states and 23591 transitions. [2021-11-07 02:19:26,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:26,527 INFO L276 IsEmpty]: Start isEmpty. Operand 12657 states and 23591 transitions. [2021-11-07 02:19:26,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 02:19:26,529 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:26,529 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:19:26,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:19:26,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:19:26,744 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:19:26,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:26,745 INFO L85 PathProgramCache]: Analyzing trace with hash -631126613, now seen corresponding path program 1 times [2021-11-07 02:19:26,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:26,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1809615513] [2021-11-07 02:19:26,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:26,746 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:26,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:26,746 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:26,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:19:27,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:27,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:19:27,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:27,706 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 02:19:27,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:28,004 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 02:19:28,004 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:28,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1809615513] [2021-11-07 02:19:28,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1809615513] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:28,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:19:28,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 02:19:28,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981008659] [2021-11-07 02:19:28,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:19:28,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:28,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:19:28,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:19:28,008 INFO L87 Difference]: Start difference. First operand 12657 states and 23591 transitions. Second operand has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 5 states have internal predecessors, (134), 0 states have call successors, (0), 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 02:19:32,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:32,907 INFO L93 Difference]: Finished difference Result 68597 states and 128201 transitions. [2021-11-07 02:19:32,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:19:32,908 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 5 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-07 02:19:32,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:32,992 INFO L225 Difference]: With dead ends: 68597 [2021-11-07 02:19:32,992 INFO L226 Difference]: Without dead ends: 59466 [2021-11-07 02:19:33,008 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:19:33,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59466 states. [2021-11-07 02:19:34,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59466 to 20297. [2021-11-07 02:19:34,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20297 states, 20292 states have (on average 1.8668440764833432) internal successors, (37882), 20296 states have internal predecessors, (37882), 0 states have call successors, (0), 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 02:19:34,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20297 states to 20297 states and 37882 transitions. [2021-11-07 02:19:34,575 INFO L78 Accepts]: Start accepts. Automaton has 20297 states and 37882 transitions. Word has length 77 [2021-11-07 02:19:34,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:34,576 INFO L470 AbstractCegarLoop]: Abstraction has 20297 states and 37882 transitions. [2021-11-07 02:19:34,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 5 states have internal predecessors, (134), 0 states have call successors, (0), 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 02:19:34,576 INFO L276 IsEmpty]: Start isEmpty. Operand 20297 states and 37882 transitions. [2021-11-07 02:19:34,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 02:19:34,578 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:34,578 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:19:34,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:19:34,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:19:34,792 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:19:34,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:34,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1105820272, now seen corresponding path program 1 times [2021-11-07 02:19:34,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:34,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [944687273] [2021-11-07 02:19:34,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:34,794 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:34,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:34,794 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:34,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 02:19:35,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:35,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:19:35,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:35,814 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 02:19:35,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:35,975 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 02:19:35,975 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:35,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [944687273] [2021-11-07 02:19:35,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [944687273] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:35,976 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:19:35,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:19:35,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496419813] [2021-11-07 02:19:35,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:19:35,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:35,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:19:35,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:19:35,981 INFO L87 Difference]: Start difference. First operand 20297 states and 37882 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 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 02:19:38,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:38,268 INFO L93 Difference]: Finished difference Result 48999 states and 91117 transitions. [2021-11-07 02:19:38,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:19:38,270 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-07 02:19:38,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:38,305 INFO L225 Difference]: With dead ends: 48999 [2021-11-07 02:19:38,305 INFO L226 Difference]: Without dead ends: 30238 [2021-11-07 02:19:38,318 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:19:38,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30238 states. [2021-11-07 02:19:39,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30238 to 20174. [2021-11-07 02:19:39,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20174 states, 20169 states have (on average 1.8559670781893005) internal successors, (37433), 20173 states have internal predecessors, (37433), 0 states have call successors, (0), 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 02:19:39,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20174 states to 20174 states and 37433 transitions. [2021-11-07 02:19:39,663 INFO L78 Accepts]: Start accepts. Automaton has 20174 states and 37433 transitions. Word has length 84 [2021-11-07 02:19:39,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:39,663 INFO L470 AbstractCegarLoop]: Abstraction has 20174 states and 37433 transitions. [2021-11-07 02:19:39,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 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 02:19:39,663 INFO L276 IsEmpty]: Start isEmpty. Operand 20174 states and 37433 transitions. [2021-11-07 02:19:39,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 02:19:39,665 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:39,665 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:19:39,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 02:19:39,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:19:39,880 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:19:39,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:39,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1183531315, now seen corresponding path program 1 times [2021-11-07 02:19:39,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:39,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1468592382] [2021-11-07 02:19:39,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:39,882 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:39,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:39,883 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:39,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 02:19:40,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:40,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:19:40,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:40,953 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 02:19:40,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:41,129 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 02:19:41,130 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:41,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1468592382] [2021-11-07 02:19:41,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1468592382] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:41,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:19:41,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:19:41,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492890679] [2021-11-07 02:19:41,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:19:41,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:41,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:19:41,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:19:41,132 INFO L87 Difference]: Start difference. First operand 20174 states and 37433 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 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 02:19:42,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:42,215 INFO L93 Difference]: Finished difference Result 36966 states and 68549 transitions. [2021-11-07 02:19:42,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:19:42,216 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-07 02:19:42,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:42,239 INFO L225 Difference]: With dead ends: 36966 [2021-11-07 02:19:42,240 INFO L226 Difference]: Without dead ends: 20189 [2021-11-07 02:19:42,252 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:19:42,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20189 states. [2021-11-07 02:19:43,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20189 to 20174. [2021-11-07 02:19:43,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20174 states, 20169 states have (on average 1.8489265704794486) internal successors, (37291), 20173 states have internal predecessors, (37291), 0 states have call successors, (0), 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 02:19:43,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20174 states to 20174 states and 37291 transitions. [2021-11-07 02:19:43,738 INFO L78 Accepts]: Start accepts. Automaton has 20174 states and 37291 transitions. Word has length 84 [2021-11-07 02:19:43,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:43,739 INFO L470 AbstractCegarLoop]: Abstraction has 20174 states and 37291 transitions. [2021-11-07 02:19:43,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 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 02:19:43,739 INFO L276 IsEmpty]: Start isEmpty. Operand 20174 states and 37291 transitions. [2021-11-07 02:19:43,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 02:19:43,741 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:43,741 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:19:43,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 02:19:43,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:19:43,942 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:19:43,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:43,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1789277062, now seen corresponding path program 1 times [2021-11-07 02:19:43,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:43,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [293483483] [2021-11-07 02:19:43,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:43,943 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:43,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:43,944 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:43,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 02:19:44,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:44,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:19:44,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:45,030 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 02:19:45,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:45,282 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 02:19:45,283 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:45,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [293483483] [2021-11-07 02:19:45,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [293483483] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:45,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:19:45,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 02:19:45,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485203827] [2021-11-07 02:19:45,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:19:45,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:45,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:19:45,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:19:45,284 INFO L87 Difference]: Start difference. First operand 20174 states and 37291 transitions. Second operand has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 5 states have internal predecessors, (155), 0 states have call successors, (0), 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 02:19:48,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:48,896 INFO L93 Difference]: Finished difference Result 58015 states and 107191 transitions. [2021-11-07 02:19:48,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:19:48,896 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 5 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-07 02:19:48,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:48,946 INFO L225 Difference]: With dead ends: 58015 [2021-11-07 02:19:48,946 INFO L226 Difference]: Without dead ends: 41539 [2021-11-07 02:19:48,957 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:19:48,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41539 states. [2021-11-07 02:19:50,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41539 to 16706. [2021-11-07 02:19:50,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16706 states, 16701 states have (on average 1.8408478534219508) internal successors, (30744), 16705 states have internal predecessors, (30744), 0 states have call successors, (0), 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 02:19:50,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16706 states to 16706 states and 30744 transitions. [2021-11-07 02:19:50,126 INFO L78 Accepts]: Start accepts. Automaton has 16706 states and 30744 transitions. Word has length 85 [2021-11-07 02:19:50,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:50,126 INFO L470 AbstractCegarLoop]: Abstraction has 16706 states and 30744 transitions. [2021-11-07 02:19:50,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 5 states have internal predecessors, (155), 0 states have call successors, (0), 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 02:19:50,127 INFO L276 IsEmpty]: Start isEmpty. Operand 16706 states and 30744 transitions. [2021-11-07 02:19:50,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 02:19:50,129 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:50,129 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:19:50,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 02:19:50,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:19:50,329 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:19:50,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:50,330 INFO L85 PathProgramCache]: Analyzing trace with hash 778159812, now seen corresponding path program 1 times [2021-11-07 02:19:50,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:50,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1963259716] [2021-11-07 02:19:50,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:50,331 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:50,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:50,332 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:50,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 02:19:51,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:51,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:19:51,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:51,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:19:51,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:51,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:19:51,844 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:51,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1963259716] [2021-11-07 02:19:51,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1963259716] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:51,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:19:51,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 02:19:51,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623420853] [2021-11-07 02:19:51,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 02:19:51,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:51,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 02:19:51,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:19:51,846 INFO L87 Difference]: Start difference. First operand 16706 states and 30744 transitions. Second operand has 10 states, 10 states have (on average 16.1) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 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 02:20:05,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:05,492 INFO L93 Difference]: Finished difference Result 112117 states and 205978 transitions. [2021-11-07 02:20:05,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-07 02:20:05,493 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 16.1) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-07 02:20:05,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:05,653 INFO L225 Difference]: With dead ends: 112117 [2021-11-07 02:20:05,653 INFO L226 Difference]: Without dead ends: 97003 [2021-11-07 02:20:05,678 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=905, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 02:20:05,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97003 states. [2021-11-07 02:20:08,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97003 to 40417. [2021-11-07 02:20:08,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40417 states, 40412 states have (on average 1.8454172028110463) internal successors, (74577), 40416 states have internal predecessors, (74577), 0 states have call successors, (0), 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 02:20:08,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40417 states to 40417 states and 74577 transitions. [2021-11-07 02:20:08,977 INFO L78 Accepts]: Start accepts. Automaton has 40417 states and 74577 transitions. Word has length 85 [2021-11-07 02:20:08,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:08,977 INFO L470 AbstractCegarLoop]: Abstraction has 40417 states and 74577 transitions. [2021-11-07 02:20:08,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 16.1) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 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 02:20:08,977 INFO L276 IsEmpty]: Start isEmpty. Operand 40417 states and 74577 transitions. [2021-11-07 02:20:08,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 02:20:08,979 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:08,979 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:20:08,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:09,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:09,180 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:20:09,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:09,181 INFO L85 PathProgramCache]: Analyzing trace with hash -2026681364, now seen corresponding path program 1 times [2021-11-07 02:20:09,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:09,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1825766555] [2021-11-07 02:20:09,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:09,182 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:09,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:09,184 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:09,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b2cd4f4-0be2-4748-a30e-0b6a5c6a0c10/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 02:20:10,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:10,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:20:10,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:10,318 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 02:20:10,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:10,495 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 02:20:10,496 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:10,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1825766555] [2021-11-07 02:20:10,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1825766555] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:10,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:10,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 02:20:10,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981013366] [2021-11-07 02:20:10,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:20:10,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:10,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:20:10,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:20:10,497 INFO L87 Difference]: Start difference. First operand 40417 states and 74577 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 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 02:20:24,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:24,826 INFO L93 Difference]: Finished difference Result 201479 states and 368874 transitions. [2021-11-07 02:20:24,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:20:24,828 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 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 86 [2021-11-07 02:20:24,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:25,315 INFO L225 Difference]: With dead ends: 201479 [2021-11-07 02:20:25,315 INFO L226 Difference]: Without dead ends: 164782 [2021-11-07 02:20:25,368 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 167 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 02:20:25,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164782 states.