./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product30.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/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_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/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_41476236-3a14-413b-920c-650ed47c2639/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 b5032f6ecc7a7304ce28757cb2a6aad82a2091f27bc978e38426a37817981d0c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:19:11,297 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:19:11,299 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:19:11,348 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:19:11,349 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:19:11,354 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:19:11,356 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:19:11,361 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:19:11,364 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:19:11,372 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:19:11,373 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:19:11,375 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:19:11,375 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:19:11,378 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:19:11,381 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:19:11,388 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:19:11,390 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:19:11,391 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:19:11,393 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:19:11,395 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:19:11,397 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:19:11,398 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:19:11,400 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:19:11,401 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:19:11,404 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:19:11,405 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:19:11,405 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:19:11,406 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:19:11,407 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:19:11,408 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:19:11,408 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:19:11,409 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:19:11,410 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:19:11,411 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:19:11,412 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:19:11,412 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:19:11,413 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:19:11,413 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:19:11,414 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:19:11,415 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:19:11,415 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:19:11,416 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:19:11,442 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:19:11,442 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:19:11,443 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:19:11,443 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:19:11,444 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:19:11,444 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:19:11,444 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:19:11,444 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:19:11,445 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:19:11,445 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:19:11,445 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:19:11,445 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:19:11,446 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:19:11,446 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:19:11,446 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:19:11,447 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:19:11,447 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:19:11,447 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:19:11,448 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:19:11,448 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:19:11,448 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:19:11,448 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:19:11,448 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:19:11,449 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:19:11,449 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:19:11,449 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:19:11,449 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:19:11,450 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:19:11,450 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:19:11,450 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:19:11,450 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:19:11,451 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:19:11,451 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:19:11,451 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:19:11,451 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:19:11,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:19:11,452 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:19:11,452 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:19:11,452 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:19:11,452 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_41476236-3a14-413b-920c-650ed47c2639/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b5032f6ecc7a7304ce28757cb2a6aad82a2091f27bc978e38426a37817981d0c [2021-11-07 01:19:11,687 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:19:11,713 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:19:11,716 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:19:11,718 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:19:11,719 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:19:11,720 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec1_product30.cil.c [2021-11-07 01:19:11,812 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/data/b734031f4/989e398e15fe4e5db80c1a302e8016bd/FLAGb667d8de8 [2021-11-07 01:19:12,467 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:19:12,468 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/sv-benchmarks/c/product-lines/elevator_spec1_product30.cil.c [2021-11-07 01:19:12,488 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/data/b734031f4/989e398e15fe4e5db80c1a302e8016bd/FLAGb667d8de8 [2021-11-07 01:19:12,670 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/data/b734031f4/989e398e15fe4e5db80c1a302e8016bd [2021-11-07 01:19:12,673 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:19:12,675 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:19:12,677 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:19:12,677 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:19:12,681 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:19:12,682 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:19:12" (1/1) ... [2021-11-07 01:19:12,683 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d2f8345 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:12, skipping insertion in model container [2021-11-07 01:19:12,684 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:19:12" (1/1) ... [2021-11-07 01:19:12,692 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:19:12,772 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:19:13,010 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_41476236-3a14-413b-920c-650ed47c2639/sv-benchmarks/c/product-lines/elevator_spec1_product30.cil.c[1545,1558] [2021-11-07 01:19:13,468 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:19:13,484 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:19:13,485 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4755aa63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:13, skipping insertion in model container [2021-11-07 01:19:13,485 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:19:13,485 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:19:13,489 INFO L168 Benchmark]: Toolchain (without parser) took 811.97 ms. Allocated memory is still 117.4 MB. Free memory was 84.9 MB in the beginning and 78.9 MB in the end (delta: 6.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:19:13,490 INFO L168 Benchmark]: CDTParser took 0.97 ms. Allocated memory is still 90.2 MB. Free memory is still 50.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:19:13,492 INFO L168 Benchmark]: CACSL2BoogieTranslator took 808.74 ms. Allocated memory is still 117.4 MB. Free memory was 84.6 MB in the beginning and 78.9 MB in the end (delta: 5.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:19:13,494 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.97 ms. Allocated memory is still 90.2 MB. Free memory is still 50.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 808.74 ms. Allocated memory is still 117.4 MB. Free memory was 84.6 MB in the beginning and 78.9 MB in the end (delta: 5.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 188]: 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_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/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_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/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_41476236-3a14-413b-920c-650ed47c2639/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 b5032f6ecc7a7304ce28757cb2a6aad82a2091f27bc978e38426a37817981d0c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:19:15,763 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:19:15,767 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:19:15,828 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:19:15,829 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:19:15,833 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:19:15,835 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:19:15,840 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:19:15,844 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:19:15,851 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:19:15,853 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:19:15,855 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:19:15,856 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:19:15,858 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:19:15,861 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:19:15,866 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:19:15,868 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:19:15,870 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:19:15,872 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:19:15,881 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:19:15,883 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:19:15,885 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:19:15,888 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:19:15,891 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:19:15,900 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:19:15,901 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:19:15,901 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:19:15,903 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:19:15,904 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:19:15,905 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:19:15,905 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:19:15,906 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:19:15,909 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:19:15,910 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:19:15,911 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:19:15,912 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:19:15,913 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:19:15,913 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:19:15,913 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:19:15,915 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:19:15,916 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:19:15,917 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:19:15,964 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:19:15,964 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:19:15,966 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:19:15,966 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:19:15,966 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:19:15,966 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:19:15,967 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:19:15,967 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:19:15,967 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:19:15,969 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:19:15,970 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:19:15,970 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:19:15,970 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:19:15,971 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:19:15,971 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:19:15,971 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:19:15,971 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:19:15,972 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:19:15,972 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:19:15,972 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:19:15,972 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:19:15,972 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:19:15,973 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:19:15,973 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:19:15,973 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:19:15,973 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:19:15,974 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:19:15,974 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:19:15,974 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:19:15,974 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:19:15,975 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:19:15,975 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:19:15,975 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:19:15,975 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:19:15,976 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:19:15,976 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_41476236-3a14-413b-920c-650ed47c2639/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b5032f6ecc7a7304ce28757cb2a6aad82a2091f27bc978e38426a37817981d0c [2021-11-07 01:19:16,371 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:19:16,393 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:19:16,396 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:19:16,397 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:19:16,398 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:19:16,399 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec1_product30.cil.c [2021-11-07 01:19:16,453 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/data/583f0f6e8/614840545ce34049b01e324e958b5238/FLAG5a098b479 [2021-11-07 01:19:17,133 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:19:17,136 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/sv-benchmarks/c/product-lines/elevator_spec1_product30.cil.c [2021-11-07 01:19:17,169 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/data/583f0f6e8/614840545ce34049b01e324e958b5238/FLAG5a098b479 [2021-11-07 01:19:17,328 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/data/583f0f6e8/614840545ce34049b01e324e958b5238 [2021-11-07 01:19:17,336 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:19:17,338 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:19:17,343 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:19:17,343 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:19:17,347 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:19:17,348 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:19:17" (1/1) ... [2021-11-07 01:19:17,349 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12565fbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:17, skipping insertion in model container [2021-11-07 01:19:17,350 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:19:17" (1/1) ... [2021-11-07 01:19:17,360 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:19:17,455 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:19:17,619 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_41476236-3a14-413b-920c-650ed47c2639/sv-benchmarks/c/product-lines/elevator_spec1_product30.cil.c[1545,1558] [2021-11-07 01:19:18,084 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:19:18,104 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:19:18,125 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:19:18,134 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_41476236-3a14-413b-920c-650ed47c2639/sv-benchmarks/c/product-lines/elevator_spec1_product30.cil.c[1545,1558] [2021-11-07 01:19:18,339 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:19:18,348 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:19:18,360 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_41476236-3a14-413b-920c-650ed47c2639/sv-benchmarks/c/product-lines/elevator_spec1_product30.cil.c[1545,1558] [2021-11-07 01:19:18,447 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:19:18,493 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:19:18,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:18 WrapperNode [2021-11-07 01:19:18,494 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:19:18,495 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:19:18,495 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:19:18,495 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:19:18,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:18" (1/1) ... [2021-11-07 01:19:18,576 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:18" (1/1) ... [2021-11-07 01:19:19,000 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:19:19,001 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:19:19,001 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:19:19,002 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:19:19,010 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:18" (1/1) ... [2021-11-07 01:19:19,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:18" (1/1) ... [2021-11-07 01:19:19,156 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:18" (1/1) ... [2021-11-07 01:19:19,156 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:18" (1/1) ... [2021-11-07 01:19:19,324 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:18" (1/1) ... [2021-11-07 01:19:19,545 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:18" (1/1) ... [2021-11-07 01:19:19,575 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:18" (1/1) ... [2021-11-07 01:19:19,644 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:19:19,646 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:19:19,647 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:19:19,647 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:19:19,648 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:18" (1/1) ... [2021-11-07 01:19:19,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:19:19,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:19:19,687 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:19:19,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:19:19,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:19:19,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:19:19,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:19:19,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:19:37,827 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:19:37,828 INFO L299 CfgBuilder]: Removed 1529 assume(true) statements. [2021-11-07 01:19:37,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:19:37 BoogieIcfgContainer [2021-11-07 01:19:37,838 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:19:37,840 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:19:37,840 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:19:37,843 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:19:37,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:19:17" (1/3) ... [2021-11-07 01:19:37,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c51fb64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:19:37, skipping insertion in model container [2021-11-07 01:19:37,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:18" (2/3) ... [2021-11-07 01:19:37,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c51fb64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:19:37, skipping insertion in model container [2021-11-07 01:19:37,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:19:37" (3/3) ... [2021-11-07 01:19:37,847 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product30.cil.c [2021-11-07 01:19:37,853 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:19:37,854 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 01:19:37,937 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:19:37,946 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:19:37,947 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 01:19:38,098 INFO L276 IsEmpty]: Start isEmpty. Operand has 6907 states, 6901 states have (on average 1.893058976959861) internal successors, (13064), 6906 states have internal predecessors, (13064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:38,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 01:19:38,131 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:38,132 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] [2021-11-07 01:19:38,133 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:19:38,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:38,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1109125055, now seen corresponding path program 1 times [2021-11-07 01:19:38,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:19:38,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [534527098] [2021-11-07 01:19:38,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:38,167 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:19:38,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:19:38,168 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:19:38,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:19:38,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:38,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:19:38,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:19:38,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:38,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:19:38,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:38,927 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:19:38,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [534527098] [2021-11-07 01:19:38,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [534527098] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:38,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:38,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:19:38,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110135240] [2021-11-07 01:19:38,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:19:38,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:19:38,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:19:38,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:19:38,997 INFO L87 Difference]: Start difference. First operand has 6907 states, 6901 states have (on average 1.893058976959861) internal successors, (13064), 6906 states have internal predecessors, (13064), 0 states have call successors, (0), 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 18.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:39,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:39,354 INFO L93 Difference]: Finished difference Result 6926 states and 13087 transitions. [2021-11-07 01:19:39,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:19:39,356 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2021-11-07 01:19:39,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:39,442 INFO L225 Difference]: With dead ends: 6926 [2021-11-07 01:19:39,442 INFO L226 Difference]: Without dead ends: 6903 [2021-11-07 01:19:39,454 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:19:39,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6903 states. [2021-11-07 01:19:39,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6903 to 6903. [2021-11-07 01:19:39,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6903 states, 6898 states have (on average 1.8921426500434908) internal successors, (13052), 6902 states have internal predecessors, (13052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:39,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6903 states to 6903 states and 13052 transitions. [2021-11-07 01:19:39,810 INFO L78 Accepts]: Start accepts. Automaton has 6903 states and 13052 transitions. Word has length 36 [2021-11-07 01:19:39,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:39,812 INFO L470 AbstractCegarLoop]: Abstraction has 6903 states and 13052 transitions. [2021-11-07 01:19:39,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:39,813 INFO L276 IsEmpty]: Start isEmpty. Operand 6903 states and 13052 transitions. [2021-11-07 01:19:39,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 01:19:39,822 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:39,823 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:19:39,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:19:40,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:19:40,041 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:19:40,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:40,042 INFO L85 PathProgramCache]: Analyzing trace with hash 215781998, now seen corresponding path program 1 times [2021-11-07 01:19:40,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:19:40,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [660319307] [2021-11-07 01:19:40,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:40,044 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:19:40,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:19:40,046 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:19:40,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:19:40,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:40,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:19:40,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:19:40,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:40,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:19:40,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:40,843 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:19:40,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [660319307] [2021-11-07 01:19:40,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [660319307] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:40,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:40,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:19:40,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865477561] [2021-11-07 01:19:40,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:19:40,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:19:40,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:19:40,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:19:40,855 INFO L87 Difference]: Start difference. First operand 6903 states and 13052 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:41,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:41,638 INFO L93 Difference]: Finished difference Result 20629 states and 39013 transitions. [2021-11-07 01:19:41,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:19:41,639 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-07 01:19:41,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:41,932 INFO L225 Difference]: With dead ends: 20629 [2021-11-07 01:19:41,933 INFO L226 Difference]: Without dead ends: 13739 [2021-11-07 01:19:41,946 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:19:41,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13739 states. [2021-11-07 01:19:42,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13739 to 6903. [2021-11-07 01:19:42,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6903 states, 6898 states have (on average 1.8911278631487387) internal successors, (13045), 6902 states have internal predecessors, (13045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:42,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6903 states to 6903 states and 13045 transitions. [2021-11-07 01:19:42,322 INFO L78 Accepts]: Start accepts. Automaton has 6903 states and 13045 transitions. Word has length 38 [2021-11-07 01:19:42,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:42,322 INFO L470 AbstractCegarLoop]: Abstraction has 6903 states and 13045 transitions. [2021-11-07 01:19:42,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:42,323 INFO L276 IsEmpty]: Start isEmpty. Operand 6903 states and 13045 transitions. [2021-11-07 01:19:42,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 01:19:42,325 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:42,325 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] [2021-11-07 01:19:42,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:19:42,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:19:42,540 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:19:42,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:42,541 INFO L85 PathProgramCache]: Analyzing trace with hash 294599217, now seen corresponding path program 1 times [2021-11-07 01:19:42,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:19:42,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [548309776] [2021-11-07 01:19:42,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:42,542 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:19:42,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:19:42,544 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:19:42,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:19:42,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:42,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:19:42,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:19:43,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:43,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:19:43,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:43,262 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:19:43,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [548309776] [2021-11-07 01:19:43,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [548309776] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:43,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:43,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:19:43,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774541015] [2021-11-07 01:19:43,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:19:43,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:19:43,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:19:43,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:19:43,266 INFO L87 Difference]: Start difference. First operand 6903 states and 13045 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:46,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:46,427 INFO L93 Difference]: Finished difference Result 47796 states and 90367 transitions. [2021-11-07 01:19:46,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:19:46,428 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 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 44 [2021-11-07 01:19:46,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:46,633 INFO L225 Difference]: With dead ends: 47796 [2021-11-07 01:19:46,633 INFO L226 Difference]: Without dead ends: 40915 [2021-11-07 01:19:46,663 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 82 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 01:19:46,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40915 states. [2021-11-07 01:19:47,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40915 to 6881. [2021-11-07 01:19:47,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6881 states, 6876 states have (on average 1.889761489237929) internal successors, (12994), 6880 states have internal predecessors, (12994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:47,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6881 states to 6881 states and 12994 transitions. [2021-11-07 01:19:47,401 INFO L78 Accepts]: Start accepts. Automaton has 6881 states and 12994 transitions. Word has length 44 [2021-11-07 01:19:47,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:47,401 INFO L470 AbstractCegarLoop]: Abstraction has 6881 states and 12994 transitions. [2021-11-07 01:19:47,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:47,403 INFO L276 IsEmpty]: Start isEmpty. Operand 6881 states and 12994 transitions. [2021-11-07 01:19:47,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 01:19:47,406 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:47,406 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] [2021-11-07 01:19:47,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:19:47,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:19:47,620 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:19:47,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:47,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1838934256, now seen corresponding path program 1 times [2021-11-07 01:19:47,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:19:47,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1185996511] [2021-11-07 01:19:47,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:47,622 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:19:47,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:19:47,626 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:19:47,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:19:48,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:48,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:19:48,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:19:48,370 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 01:19:48,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:19:48,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:48,523 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:19:48,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1185996511] [2021-11-07 01:19:48,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1185996511] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:48,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:48,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:19:48,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63502142] [2021-11-07 01:19:48,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:19:48,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:19:48,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:19:48,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:19:48,526 INFO L87 Difference]: Start difference. First operand 6881 states and 12994 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:49,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:49,420 INFO L93 Difference]: Finished difference Result 20540 states and 38817 transitions. [2021-11-07 01:19:49,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:19:49,421 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 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 46 [2021-11-07 01:19:49,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:49,460 INFO L225 Difference]: With dead ends: 20540 [2021-11-07 01:19:49,461 INFO L226 Difference]: Without dead ends: 13681 [2021-11-07 01:19:49,475 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:19:49,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13681 states. [2021-11-07 01:19:50,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13681 to 6881. [2021-11-07 01:19:50,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6881 states, 6876 states have (on average 1.8881617219313553) internal successors, (12983), 6880 states have internal predecessors, (12983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:50,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6881 states to 6881 states and 12983 transitions. [2021-11-07 01:19:50,051 INFO L78 Accepts]: Start accepts. Automaton has 6881 states and 12983 transitions. Word has length 46 [2021-11-07 01:19:50,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:50,052 INFO L470 AbstractCegarLoop]: Abstraction has 6881 states and 12983 transitions. [2021-11-07 01:19:50,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:50,053 INFO L276 IsEmpty]: Start isEmpty. Operand 6881 states and 12983 transitions. [2021-11-07 01:19:50,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 01:19:50,054 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:50,054 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:19:50,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:19:50,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:19:50,269 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:19:50,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:50,270 INFO L85 PathProgramCache]: Analyzing trace with hash -214067205, now seen corresponding path program 1 times [2021-11-07 01:19:50,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:19:50,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1658547608] [2021-11-07 01:19:50,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:50,272 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:19:50,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:19:50,274 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:19:50,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:19:50,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:50,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 01:19:50,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:19:50,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:50,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:19:51,196 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 01:19:51,196 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:19:51,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1658547608] [2021-11-07 01:19:51,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1658547608] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:51,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:51,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:19:51,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534240993] [2021-11-07 01:19:51,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:19:51,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:19:51,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:19:51,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:19:51,199 INFO L87 Difference]: Start difference. First operand 6881 states and 12983 transitions. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:56,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:56,279 INFO L93 Difference]: Finished difference Result 74935 states and 141647 transitions. [2021-11-07 01:19:56,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:19:56,280 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-07 01:19:56,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:56,560 INFO L225 Difference]: With dead ends: 74935 [2021-11-07 01:19:56,561 INFO L226 Difference]: Without dead ends: 68079 [2021-11-07 01:19:56,594 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 96 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 01:19:56,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68079 states. [2021-11-07 01:19:57,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68079 to 6883. [2021-11-07 01:19:57,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6883 states, 6878 states have (on average 1.8871765047979063) internal successors, (12980), 6882 states have internal predecessors, (12980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:57,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6883 states to 6883 states and 12980 transitions. [2021-11-07 01:19:57,665 INFO L78 Accepts]: Start accepts. Automaton has 6883 states and 12980 transitions. Word has length 52 [2021-11-07 01:19:57,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:57,666 INFO L470 AbstractCegarLoop]: Abstraction has 6883 states and 12980 transitions. [2021-11-07 01:19:57,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:57,666 INFO L276 IsEmpty]: Start isEmpty. Operand 6883 states and 12980 transitions. [2021-11-07 01:19:57,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 01:19:57,668 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:57,668 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:19:57,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:19:57,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:19:57,885 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:19:57,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:57,885 INFO L85 PathProgramCache]: Analyzing trace with hash -2012807608, now seen corresponding path program 1 times [2021-11-07 01:19:57,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:19:57,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1326166501] [2021-11-07 01:19:57,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:57,887 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:19:57,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:19:57,890 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:19:57,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:19:58,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:58,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:19:58,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:19:58,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:58,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:19:58,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:58,815 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:19:58,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1326166501] [2021-11-07 01:19:58,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1326166501] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:58,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:58,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:19:58,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543206972] [2021-11-07 01:19:58,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:19:58,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:19:58,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:19:58,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:19:58,818 INFO L87 Difference]: Start difference. First operand 6883 states and 12980 transitions. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:03,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:03,375 INFO L93 Difference]: Finished difference Result 74903 states and 141568 transitions. [2021-11-07 01:20:03,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:20:03,376 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-07 01:20:03,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:03,546 INFO L225 Difference]: With dead ends: 74903 [2021-11-07 01:20:03,546 INFO L226 Difference]: Without dead ends: 68047 [2021-11-07 01:20:03,581 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 100 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 01:20:03,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68047 states. [2021-11-07 01:20:04,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68047 to 6887. [2021-11-07 01:20:04,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6887 states, 6882 states have (on average 1.8865155478058704) internal successors, (12983), 6886 states have internal predecessors, (12983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:04,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6887 states to 6887 states and 12983 transitions. [2021-11-07 01:20:04,339 INFO L78 Accepts]: Start accepts. Automaton has 6887 states and 12983 transitions. Word has length 54 [2021-11-07 01:20:04,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:04,339 INFO L470 AbstractCegarLoop]: Abstraction has 6887 states and 12983 transitions. [2021-11-07 01:20:04,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:04,340 INFO L276 IsEmpty]: Start isEmpty. Operand 6887 states and 12983 transitions. [2021-11-07 01:20:04,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 01:20:04,344 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:04,345 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:20:04,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:04,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:04,559 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:20:04,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:04,559 INFO L85 PathProgramCache]: Analyzing trace with hash -838233221, now seen corresponding path program 1 times [2021-11-07 01:20:04,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:04,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [940070809] [2021-11-07 01:20:04,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:04,561 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:04,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:04,562 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:04,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:20:05,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:05,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:20:05,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:05,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:05,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:05,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:05,323 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:05,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [940070809] [2021-11-07 01:20:05,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [940070809] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:05,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:05,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:20:05,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246183415] [2021-11-07 01:20:05,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:20:05,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:05,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:20:05,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:20:05,326 INFO L87 Difference]: Start difference. First operand 6887 states and 12983 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:05,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:05,788 INFO L93 Difference]: Finished difference Result 13722 states and 25897 transitions. [2021-11-07 01:20:05,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:20:05,789 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-07 01:20:05,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:05,809 INFO L225 Difference]: With dead ends: 13722 [2021-11-07 01:20:05,809 INFO L226 Difference]: Without dead ends: 6866 [2021-11-07 01:20:05,822 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:20:05,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6866 states. [2021-11-07 01:20:06,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6866 to 6866. [2021-11-07 01:20:06,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6866 states, 6861 states have (on average 1.8867512024486226) internal successors, (12945), 6865 states have internal predecessors, (12945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:06,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6866 states to 6866 states and 12945 transitions. [2021-11-07 01:20:06,254 INFO L78 Accepts]: Start accepts. Automaton has 6866 states and 12945 transitions. Word has length 56 [2021-11-07 01:20:06,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:06,257 INFO L470 AbstractCegarLoop]: Abstraction has 6866 states and 12945 transitions. [2021-11-07 01:20:06,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:06,258 INFO L276 IsEmpty]: Start isEmpty. Operand 6866 states and 12945 transitions. [2021-11-07 01:20:06,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 01:20:06,259 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:06,259 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:20:06,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:06,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:06,481 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:20:06,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:06,482 INFO L85 PathProgramCache]: Analyzing trace with hash -95272925, now seen corresponding path program 1 times [2021-11-07 01:20:06,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:06,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1985416434] [2021-11-07 01:20:06,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:06,482 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:06,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:06,484 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:06,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:20:06,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:06,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:20:06,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:07,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:07,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:07,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:07,195 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:07,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1985416434] [2021-11-07 01:20:07,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1985416434] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:07,196 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:07,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:20:07,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311586242] [2021-11-07 01:20:07,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:20:07,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:07,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:20:07,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:20:07,198 INFO L87 Difference]: Start difference. First operand 6866 states and 12945 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:07,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:07,793 INFO L93 Difference]: Finished difference Result 13666 states and 25800 transitions. [2021-11-07 01:20:07,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:20:07,793 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 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 01:20:07,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:07,807 INFO L225 Difference]: With dead ends: 13666 [2021-11-07 01:20:07,807 INFO L226 Difference]: Without dead ends: 6841 [2021-11-07 01:20:07,819 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:20:07,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6841 states. [2021-11-07 01:20:08,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6841 to 6841. [2021-11-07 01:20:08,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6841 states, 6836 states have (on average 1.8872147454651844) internal successors, (12901), 6840 states have internal predecessors, (12901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:08,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6841 states to 6841 states and 12901 transitions. [2021-11-07 01:20:08,324 INFO L78 Accepts]: Start accepts. Automaton has 6841 states and 12901 transitions. Word has length 57 [2021-11-07 01:20:08,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:08,325 INFO L470 AbstractCegarLoop]: Abstraction has 6841 states and 12901 transitions. [2021-11-07 01:20:08,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:08,325 INFO L276 IsEmpty]: Start isEmpty. Operand 6841 states and 12901 transitions. [2021-11-07 01:20:08,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 01:20:08,327 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:08,327 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] [2021-11-07 01:20:08,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:08,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:08,545 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:20:08,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:08,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1507573612, now seen corresponding path program 1 times [2021-11-07 01:20:08,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:08,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1615814380] [2021-11-07 01:20:08,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:08,546 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:08,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:08,547 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:08,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:20:08,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:09,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:20:09,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:09,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:09,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:09,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:09,302 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:09,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1615814380] [2021-11-07 01:20:09,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1615814380] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:09,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:09,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:20:09,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350533029] [2021-11-07 01:20:09,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:20:09,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:09,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:20:09,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:20:09,304 INFO L87 Difference]: Start difference. First operand 6841 states and 12901 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:09,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:09,826 INFO L93 Difference]: Finished difference Result 13641 states and 25756 transitions. [2021-11-07 01:20:09,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:20:09,827 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 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 58 [2021-11-07 01:20:09,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:09,835 INFO L225 Difference]: With dead ends: 13641 [2021-11-07 01:20:09,835 INFO L226 Difference]: Without dead ends: 6838 [2021-11-07 01:20:09,846 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:20:09,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6838 states. [2021-11-07 01:20:10,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6838 to 6838. [2021-11-07 01:20:10,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6838 states, 6833 states have (on average 1.886872530367335) internal successors, (12893), 6837 states have internal predecessors, (12893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:10,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6838 states to 6838 states and 12893 transitions. [2021-11-07 01:20:10,174 INFO L78 Accepts]: Start accepts. Automaton has 6838 states and 12893 transitions. Word has length 58 [2021-11-07 01:20:10,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:10,175 INFO L470 AbstractCegarLoop]: Abstraction has 6838 states and 12893 transitions. [2021-11-07 01:20:10,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:10,175 INFO L276 IsEmpty]: Start isEmpty. Operand 6838 states and 12893 transitions. [2021-11-07 01:20:10,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 01:20:10,176 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:10,176 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] [2021-11-07 01:20:10,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:10,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:10,383 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:20:10,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:10,383 INFO L85 PathProgramCache]: Analyzing trace with hash 28509533, now seen corresponding path program 1 times [2021-11-07 01:20:10,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:10,384 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1406886854] [2021-11-07 01:20:10,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:10,384 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:10,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:10,385 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:10,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:20:10,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:10,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 01:20:10,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:11,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:11,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:11,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:11,222 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:11,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1406886854] [2021-11-07 01:20:11,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1406886854] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:11,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:11,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:20:11,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48560934] [2021-11-07 01:20:11,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:20:11,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:11,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:20:11,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:20:11,223 INFO L87 Difference]: Start difference. First operand 6838 states and 12893 transitions. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:11,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:11,812 INFO L93 Difference]: Finished difference Result 13632 states and 25738 transitions. [2021-11-07 01:20:11,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:20:11,813 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 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 59 [2021-11-07 01:20:11,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:11,821 INFO L225 Difference]: With dead ends: 13632 [2021-11-07 01:20:11,822 INFO L226 Difference]: Without dead ends: 6836 [2021-11-07 01:20:11,828 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:20:11,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6836 states. [2021-11-07 01:20:12,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6836 to 6836. [2021-11-07 01:20:12,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6836 states, 6831 states have (on average 1.8865466256770604) internal successors, (12887), 6835 states have internal predecessors, (12887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:12,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6836 states to 6836 states and 12887 transitions. [2021-11-07 01:20:12,201 INFO L78 Accepts]: Start accepts. Automaton has 6836 states and 12887 transitions. Word has length 59 [2021-11-07 01:20:12,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:12,201 INFO L470 AbstractCegarLoop]: Abstraction has 6836 states and 12887 transitions. [2021-11-07 01:20:12,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:12,202 INFO L276 IsEmpty]: Start isEmpty. Operand 6836 states and 12887 transitions. [2021-11-07 01:20:12,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:20:12,203 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:12,203 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] [2021-11-07 01:20:12,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:12,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:12,423 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:20:12,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:12,423 INFO L85 PathProgramCache]: Analyzing trace with hash -285887087, now seen corresponding path program 1 times [2021-11-07 01:20:12,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:12,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1813355308] [2021-11-07 01:20:12,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:12,424 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:12,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:12,425 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:12,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:20:13,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:13,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:20:13,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:13,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:13,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:13,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:13,392 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:13,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1813355308] [2021-11-07 01:20:13,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1813355308] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:13,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:13,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:20:13,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282476611] [2021-11-07 01:20:13,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:20:13,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:13,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:20:13,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:20:13,395 INFO L87 Difference]: Start difference. First operand 6836 states and 12887 transitions. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 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 01:20:13,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:13,904 INFO L93 Difference]: Finished difference Result 13625 states and 25723 transitions. [2021-11-07 01:20:13,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:20:13,905 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 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 60 [2021-11-07 01:20:13,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:13,914 INFO L225 Difference]: With dead ends: 13625 [2021-11-07 01:20:13,914 INFO L226 Difference]: Without dead ends: 6834 [2021-11-07 01:20:13,922 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:20:13,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6834 states. [2021-11-07 01:20:14,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6834 to 6834. [2021-11-07 01:20:14,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6834 states, 6829 states have (on average 1.8862205300922537) internal successors, (12881), 6833 states have internal predecessors, (12881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:14,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6834 states to 6834 states and 12881 transitions. [2021-11-07 01:20:14,351 INFO L78 Accepts]: Start accepts. Automaton has 6834 states and 12881 transitions. Word has length 60 [2021-11-07 01:20:14,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:14,352 INFO L470 AbstractCegarLoop]: Abstraction has 6834 states and 12881 transitions. [2021-11-07 01:20:14,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 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 01:20:14,352 INFO L276 IsEmpty]: Start isEmpty. Operand 6834 states and 12881 transitions. [2021-11-07 01:20:14,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 01:20:14,353 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:14,353 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] [2021-11-07 01:20:14,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:14,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:14,553 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:20:14,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:14,554 INFO L85 PathProgramCache]: Analyzing trace with hash -2003476206, now seen corresponding path program 1 times [2021-11-07 01:20:14,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:14,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [955915939] [2021-11-07 01:20:14,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:14,555 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:14,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:14,555 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:14,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:20:15,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:15,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:20:15,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:15,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:15,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:15,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:15,863 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:15,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [955915939] [2021-11-07 01:20:15,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [955915939] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:15,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:15,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 01:20:15,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682445621] [2021-11-07 01:20:15,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:20:15,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:15,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:20:15,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:20:15,866 INFO L87 Difference]: Start difference. First operand 6834 states and 12881 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:17,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:17,785 INFO L93 Difference]: Finished difference Result 17653 states and 33348 transitions. [2021-11-07 01:20:17,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:20:17,790 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 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 61 [2021-11-07 01:20:17,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:17,806 INFO L225 Difference]: With dead ends: 17653 [2021-11-07 01:20:17,806 INFO L226 Difference]: Without dead ends: 14204 [2021-11-07 01:20:17,812 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:20:17,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14204 states. [2021-11-07 01:20:18,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14204 to 8921. [2021-11-07 01:20:18,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8921 states, 8916 states have (on average 1.8882907133243607) internal successors, (16836), 8920 states have internal predecessors, (16836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:18,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8921 states to 8921 states and 16836 transitions. [2021-11-07 01:20:18,279 INFO L78 Accepts]: Start accepts. Automaton has 8921 states and 16836 transitions. Word has length 61 [2021-11-07 01:20:18,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:18,280 INFO L470 AbstractCegarLoop]: Abstraction has 8921 states and 16836 transitions. [2021-11-07 01:20:18,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:18,280 INFO L276 IsEmpty]: Start isEmpty. Operand 8921 states and 16836 transitions. [2021-11-07 01:20:18,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:20:18,289 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:18,289 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] [2021-11-07 01:20:18,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:18,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:18,503 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:20:18,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:18,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1864796415, now seen corresponding path program 1 times [2021-11-07 01:20:18,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:18,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1442748425] [2021-11-07 01:20:18,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:18,505 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:18,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:18,506 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:18,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:20:19,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:19,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:20:19,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:19,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:19,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:19,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:19,713 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:19,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1442748425] [2021-11-07 01:20:19,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1442748425] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:19,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:19,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-07 01:20:19,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458932084] [2021-11-07 01:20:19,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:20:19,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:19,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:20:19,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:20:19,715 INFO L87 Difference]: Start difference. First operand 8921 states and 16836 transitions. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:20,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:20,854 INFO L93 Difference]: Finished difference Result 16748 states and 31406 transitions. [2021-11-07 01:20:20,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:20:20,855 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 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 79 [2021-11-07 01:20:20,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:20,869 INFO L225 Difference]: With dead ends: 16748 [2021-11-07 01:20:20,869 INFO L226 Difference]: Without dead ends: 9045 [2021-11-07 01:20:20,877 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:20:20,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9045 states. [2021-11-07 01:20:21,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9045 to 6261. [2021-11-07 01:20:21,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6261 states, 6256 states have (on average 1.8804347826086956) internal successors, (11764), 6260 states have internal predecessors, (11764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:21,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6261 states to 6261 states and 11764 transitions. [2021-11-07 01:20:21,281 INFO L78 Accepts]: Start accepts. Automaton has 6261 states and 11764 transitions. Word has length 79 [2021-11-07 01:20:21,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:21,281 INFO L470 AbstractCegarLoop]: Abstraction has 6261 states and 11764 transitions. [2021-11-07 01:20:21,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:21,282 INFO L276 IsEmpty]: Start isEmpty. Operand 6261 states and 11764 transitions. [2021-11-07 01:20:21,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 01:20:21,285 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:21,286 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] [2021-11-07 01:20:21,304 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-07 01:20:21,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:21,504 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:20:21,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:21,505 INFO L85 PathProgramCache]: Analyzing trace with hash -2114424974, now seen corresponding path program 1 times [2021-11-07 01:20:21,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:21,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2086304784] [2021-11-07 01:20:21,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:21,506 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:21,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:21,507 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:21,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:20:22,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:22,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:20:22,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:22,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:22,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:24,318 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 01:20:24,318 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:24,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2086304784] [2021-11-07 01:20:24,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2086304784] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:24,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:24,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 01:20:24,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858208784] [2021-11-07 01:20:24,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:20:24,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:24,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:20:24,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:20:24,320 INFO L87 Difference]: Start difference. First operand 6261 states and 11764 transitions. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 5 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:28,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:28,166 INFO L93 Difference]: Finished difference Result 19682 states and 37097 transitions. [2021-11-07 01:20:28,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:20:28,171 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 5 states have internal predecessors, (130), 0 states have call successors, (0), 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 80 [2021-11-07 01:20:28,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:28,196 INFO L225 Difference]: With dead ends: 19682 [2021-11-07 01:20:28,197 INFO L226 Difference]: Without dead ends: 13486 [2021-11-07 01:20:28,206 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:20:28,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13486 states. [2021-11-07 01:20:28,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13486 to 8641. [2021-11-07 01:20:28,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8641 states, 8636 states have (on average 1.8816581750810562) internal successors, (16250), 8640 states have internal predecessors, (16250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:28,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8641 states to 8641 states and 16250 transitions. [2021-11-07 01:20:28,996 INFO L78 Accepts]: Start accepts. Automaton has 8641 states and 16250 transitions. Word has length 80 [2021-11-07 01:20:28,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:28,997 INFO L470 AbstractCegarLoop]: Abstraction has 8641 states and 16250 transitions. [2021-11-07 01:20:28,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 5 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:28,997 INFO L276 IsEmpty]: Start isEmpty. Operand 8641 states and 16250 transitions. [2021-11-07 01:20:29,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 01:20:29,001 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:29,001 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:20:29,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:29,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:29,211 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:20:29,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:29,211 INFO L85 PathProgramCache]: Analyzing trace with hash 711684128, now seen corresponding path program 1 times [2021-11-07 01:20:29,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:29,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [196214061] [2021-11-07 01:20:29,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:29,213 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:29,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:29,215 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:29,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:20:30,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:30,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:20:30,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:30,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:30,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:30,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:30,628 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:30,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [196214061] [2021-11-07 01:20:30,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [196214061] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:30,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:30,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:20:30,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049646582] [2021-11-07 01:20:30,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:20:30,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:30,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:20:30,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:20:30,631 INFO L87 Difference]: Start difference. First operand 8641 states and 16250 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 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 01:20:38,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:38,395 INFO L93 Difference]: Finished difference Result 37574 states and 70437 transitions. [2021-11-07 01:20:38,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:20:38,396 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 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 81 [2021-11-07 01:20:38,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:38,436 INFO L225 Difference]: With dead ends: 37574 [2021-11-07 01:20:38,436 INFO L226 Difference]: Without dead ends: 28997 [2021-11-07 01:20:38,445 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:20:38,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28997 states. [2021-11-07 01:20:39,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28997 to 8655. [2021-11-07 01:20:39,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8655 states, 8650 states have (on average 1.8802312138728323) internal successors, (16264), 8654 states have internal predecessors, (16264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:39,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8655 states to 8655 states and 16264 transitions. [2021-11-07 01:20:39,096 INFO L78 Accepts]: Start accepts. Automaton has 8655 states and 16264 transitions. Word has length 81 [2021-11-07 01:20:39,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:39,097 INFO L470 AbstractCegarLoop]: Abstraction has 8655 states and 16264 transitions. [2021-11-07 01:20:39,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 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 01:20:39,097 INFO L276 IsEmpty]: Start isEmpty. Operand 8655 states and 16264 transitions. [2021-11-07 01:20:39,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 01:20:39,100 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:39,100 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:20:39,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:39,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:39,301 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:20:39,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:39,301 INFO L85 PathProgramCache]: Analyzing trace with hash -645716240, now seen corresponding path program 1 times [2021-11-07 01:20:39,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:39,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1631635792] [2021-11-07 01:20:39,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:39,302 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:39,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:39,303 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:39,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:20:40,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:40,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:20:40,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:40,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:40,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:40,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:40,580 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:40,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1631635792] [2021-11-07 01:20:40,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1631635792] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:40,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:40,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:20:40,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816835061] [2021-11-07 01:20:40,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:20:40,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:40,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:20:40,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:20:40,582 INFO L87 Difference]: Start difference. First operand 8655 states and 16264 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:47,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:47,288 INFO L93 Difference]: Finished difference Result 26839 states and 50201 transitions. [2021-11-07 01:20:47,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:20:47,288 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-07 01:20:47,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:47,313 INFO L225 Difference]: With dead ends: 26839 [2021-11-07 01:20:47,313 INFO L226 Difference]: Without dead ends: 18235 [2021-11-07 01:20:47,323 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:20:47,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18235 states. [2021-11-07 01:20:48,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18235 to 10812. [2021-11-07 01:20:48,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10812 states, 10807 states have (on average 1.8434348107707967) internal successors, (19922), 10811 states have internal predecessors, (19922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:48,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10812 states to 10812 states and 19922 transitions. [2021-11-07 01:20:48,123 INFO L78 Accepts]: Start accepts. Automaton has 10812 states and 19922 transitions. Word has length 82 [2021-11-07 01:20:48,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:48,123 INFO L470 AbstractCegarLoop]: Abstraction has 10812 states and 19922 transitions. [2021-11-07 01:20:48,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:48,123 INFO L276 IsEmpty]: Start isEmpty. Operand 10812 states and 19922 transitions. [2021-11-07 01:20:48,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:20:48,126 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:48,126 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 01:20:48,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-07 01:20:48,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:48,346 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:20:48,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:48,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1694200438, now seen corresponding path program 1 times [2021-11-07 01:20:48,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:48,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1838252661] [2021-11-07 01:20:48,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:48,347 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:48,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:48,348 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:48,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:20:49,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:49,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:20:49,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:49,421 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 01:20:49,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:49,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:49,688 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:49,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1838252661] [2021-11-07 01:20:49,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1838252661] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:49,688 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:49,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:20:49,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752233321] [2021-11-07 01:20:49,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:20:49,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:49,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:20:49,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:20:49,690 INFO L87 Difference]: Start difference. First operand 10812 states and 19922 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:54,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:54,984 INFO L93 Difference]: Finished difference Result 75977 states and 140591 transitions. [2021-11-07 01:20:54,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:20:54,985 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-07 01:20:54,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:55,086 INFO L225 Difference]: With dead ends: 75977 [2021-11-07 01:20:55,086 INFO L226 Difference]: Without dead ends: 65225 [2021-11-07 01:20:55,101 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:20:55,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65225 states. [2021-11-07 01:20:56,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65225 to 17165. [2021-11-07 01:20:56,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17165 states, 17160 states have (on average 1.8444638694638695) internal successors, (31651), 17164 states have internal predecessors, (31651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:56,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17165 states to 17165 states and 31651 transitions. [2021-11-07 01:20:56,542 INFO L78 Accepts]: Start accepts. Automaton has 17165 states and 31651 transitions. Word has length 84 [2021-11-07 01:20:56,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:56,542 INFO L470 AbstractCegarLoop]: Abstraction has 17165 states and 31651 transitions. [2021-11-07 01:20:56,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:56,542 INFO L276 IsEmpty]: Start isEmpty. Operand 17165 states and 31651 transitions. [2021-11-07 01:20:56,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 01:20:56,545 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:56,546 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 01:20:56,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:56,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:56,765 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 01:20:56,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:56,766 INFO L85 PathProgramCache]: Analyzing trace with hash 147466529, now seen corresponding path program 1 times [2021-11-07 01:20:56,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:56,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [128434886] [2021-11-07 01:20:56,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:56,767 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:56,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:56,768 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:56,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:20:57,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:57,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:20:57,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:57,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:57,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:58,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:58,178 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:58,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [128434886] [2021-11-07 01:20:58,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [128434886] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:58,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:58,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:20:58,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629725310] [2021-11-07 01:20:58,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:20:58,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:58,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:20:58,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:20:58,181 INFO L87 Difference]: Start difference. First operand 17165 states and 31651 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 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 01:21:00,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:00,178 INFO L93 Difference]: Finished difference Result 45103 states and 83272 transitions. [2021-11-07 01:21:00,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:21:00,179 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 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 85 [2021-11-07 01:21:00,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:00,214 INFO L225 Difference]: With dead ends: 45103 [2021-11-07 01:21:00,214 INFO L226 Difference]: Without dead ends: 29789 [2021-11-07 01:21:00,226 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:21:00,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29789 states. [2021-11-07 01:21:02,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29789 to 29774. [2021-11-07 01:21:02,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29774 states, 29769 states have (on average 1.8453424703550674) internal successors, (54934), 29773 states have internal predecessors, (54934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:02,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29774 states to 29774 states and 54934 transitions. [2021-11-07 01:21:02,380 INFO L78 Accepts]: Start accepts. Automaton has 29774 states and 54934 transitions. Word has length 85 [2021-11-07 01:21:02,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:21:02,381 INFO L470 AbstractCegarLoop]: Abstraction has 29774 states and 54934 transitions. [2021-11-07 01:21:02,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 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 01:21:02,381 INFO L276 IsEmpty]: Start isEmpty. Operand 29774 states and 54934 transitions. [2021-11-07 01:21:02,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 01:21:02,384 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:02,384 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 01:21:02,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:21:02,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:21:02,599 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 01:21:02,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:02,599 INFO L85 PathProgramCache]: Analyzing trace with hash -984176783, now seen corresponding path program 1 times [2021-11-07 01:21:02,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:21:02,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [595918880] [2021-11-07 01:21:02,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:02,600 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:21:02,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:21:02,601 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:21:02,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:21:03,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:03,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:21:03,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:03,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:21:03,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:04,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:21:04,051 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:21:04,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [595918880] [2021-11-07 01:21:04,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [595918880] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:21:04,052 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:21:04,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:21:04,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169600932] [2021-11-07 01:21:04,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:21:04,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:21:04,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:21:04,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:21:04,054 INFO L87 Difference]: Start difference. First operand 29774 states and 54934 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 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 01:21:08,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:08,089 INFO L93 Difference]: Finished difference Result 81689 states and 150811 transitions. [2021-11-07 01:21:08,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:21:08,090 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 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 01:21:08,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:08,173 INFO L225 Difference]: With dead ends: 81689 [2021-11-07 01:21:08,173 INFO L226 Difference]: Without dead ends: 54838 [2021-11-07 01:21:08,190 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:21:08,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54838 states. [2021-11-07 01:21:12,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54838 to 54823. [2021-11-07 01:21:12,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54823 states, 54818 states have (on average 1.8453792549892372) internal successors, (101160), 54822 states have internal predecessors, (101160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:12,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54823 states to 54823 states and 101160 transitions. [2021-11-07 01:21:12,240 INFO L78 Accepts]: Start accepts. Automaton has 54823 states and 101160 transitions. Word has length 86 [2021-11-07 01:21:12,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:21:12,240 INFO L470 AbstractCegarLoop]: Abstraction has 54823 states and 101160 transitions. [2021-11-07 01:21:12,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 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 01:21:12,241 INFO L276 IsEmpty]: Start isEmpty. Operand 54823 states and 101160 transitions. [2021-11-07 01:21:12,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-07 01:21:12,244 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:12,244 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, 1] [2021-11-07 01:21:12,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:21:12,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:21:12,463 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 01:21:12,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:12,463 INFO L85 PathProgramCache]: Analyzing trace with hash 223474022, now seen corresponding path program 1 times [2021-11-07 01:21:12,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:21:12,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [621167044] [2021-11-07 01:21:12,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:12,464 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:21:12,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:21:12,465 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:21:12,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41476236-3a14-413b-920c-650ed47c2639/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 01:21:13,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:13,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:21:13,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:13,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:21:13,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:13,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:21:13,947 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:21:13,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [621167044] [2021-11-07 01:21:13,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [621167044] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:21:13,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:21:13,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:21:13,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455782919] [2021-11-07 01:21:13,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:21:13,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:21:13,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:21:13,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:21:13,949 INFO L87 Difference]: Start difference. First operand 54823 states and 101160 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:22,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:22,059 INFO L93 Difference]: Finished difference Result 154523 states and 285142 transitions. [2021-11-07 01:21:22,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:21:22,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 0 states have call successors, (0), 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 87 [2021-11-07 01:21:22,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:22,250 INFO L225 Difference]: With dead ends: 154523 [2021-11-07 01:21:22,250 INFO L226 Difference]: Without dead ends: 104551 [2021-11-07 01:21:22,285 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:21:22,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104551 states.