./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product11.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product11.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH --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 5477c3156be335e627e6d8ad4c695e912cf982226281f4316d6a1123dc83cedb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 03:49:19,608 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 03:49:19,610 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 03:49:19,642 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 03:49:19,642 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 03:49:19,644 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 03:49:19,646 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 03:49:19,648 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 03:49:19,651 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 03:49:19,652 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 03:49:19,654 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 03:49:19,655 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 03:49:19,657 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 03:49:19,661 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 03:49:19,663 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 03:49:19,666 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 03:49:19,670 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 03:49:19,677 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 03:49:19,679 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 03:49:19,685 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 03:49:19,692 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 03:49:19,694 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 03:49:19,696 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 03:49:19,698 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 03:49:19,703 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 03:49:19,706 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 03:49:19,707 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 03:49:19,708 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 03:49:19,709 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 03:49:19,711 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 03:49:19,711 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 03:49:19,713 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 03:49:19,715 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 03:49:19,716 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 03:49:19,718 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 03:49:19,718 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 03:49:19,719 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 03:49:19,719 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 03:49:19,720 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 03:49:19,721 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 03:49:19,721 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 03:49:19,722 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 03:49:19,766 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 03:49:19,767 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 03:49:19,769 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 03:49:19,769 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 03:49:19,769 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 03:49:19,769 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 03:49:19,770 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 03:49:19,770 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 03:49:19,776 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 03:49:19,776 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 03:49:19,777 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 03:49:19,777 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 03:49:19,778 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 03:49:19,778 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 03:49:19,778 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 03:49:19,779 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 03:49:19,779 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 03:49:19,779 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 03:49:19,780 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 03:49:19,780 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 03:49:19,780 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 03:49:19,780 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 03:49:19,781 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 03:49:19,781 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 03:49:19,781 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 03:49:19,781 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 03:49:19,781 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 03:49:19,782 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 03:49:19,782 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 03:49:19,782 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 03:49:19,782 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:49:19,783 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 03:49:19,783 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 03:49:19,784 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 03:49:19,784 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 03:49:19,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 03:49:19,784 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 03:49:19,784 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 03:49:19,785 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 03:49:19,785 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_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5477c3156be335e627e6d8ad4c695e912cf982226281f4316d6a1123dc83cedb [2021-11-03 03:49:20,080 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 03:49:20,101 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 03:49:20,104 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 03:49:20,105 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 03:49:20,106 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 03:49:20,107 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/product-lines/elevator_spec1_product11.cil.c [2021-11-03 03:49:20,170 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/data/7b1cc27d9/3e7a5a4f5b4f488293111ede8dab8c4c/FLAG0631050c0 [2021-11-03 03:49:20,954 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 03:49:20,955 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/sv-benchmarks/c/product-lines/elevator_spec1_product11.cil.c [2021-11-03 03:49:20,979 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/data/7b1cc27d9/3e7a5a4f5b4f488293111ede8dab8c4c/FLAG0631050c0 [2021-11-03 03:49:21,077 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/data/7b1cc27d9/3e7a5a4f5b4f488293111ede8dab8c4c [2021-11-03 03:49:21,079 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 03:49:21,080 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 03:49:21,093 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 03:49:21,093 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 03:49:21,097 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 03:49:21,097 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:49:21" (1/1) ... [2021-11-03 03:49:21,099 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b5cf03d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:49:21, skipping insertion in model container [2021-11-03 03:49:21,099 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:49:21" (1/1) ... [2021-11-03 03:49:21,106 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 03:49:21,209 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 03:49:21,737 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_948856b7-c0f7-4015-b668-a6b8a0126d81/sv-benchmarks/c/product-lines/elevator_spec1_product11.cil.c[40826,40839] [2021-11-03 03:49:21,962 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:49:21,981 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) [2021-11-03 03:49:21,982 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@402a1ae3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:49:21, skipping insertion in model container [2021-11-03 03:49:21,982 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 03:49:21,983 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 03:49:21,986 INFO L168 Benchmark]: Toolchain (without parser) took 903.89 ms. Allocated memory is still 119.5 MB. Free memory was 75.4 MB in the beginning and 78.7 MB in the end (delta: -3.3 MB). Peak memory consumption was 9.0 MB. Max. memory is 16.1 GB. [2021-11-03 03:49:21,987 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 119.5 MB. Free memory is still 94.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 03:49:21,989 INFO L168 Benchmark]: CACSL2BoogieTranslator took 890.04 ms. Allocated memory is still 119.5 MB. Free memory was 75.2 MB in the beginning and 78.7 MB in the end (delta: -3.5 MB). Peak memory consumption was 9.0 MB. Max. memory is 16.1 GB. [2021-11-03 03:49:21,992 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 119.5 MB. Free memory is still 94.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 890.04 ms. Allocated memory is still 119.5 MB. Free memory was 75.2 MB in the beginning and 78.7 MB in the end (delta: -3.5 MB). Peak memory consumption was 9.0 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2070]: 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_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product11.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH --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 5477c3156be335e627e6d8ad4c695e912cf982226281f4316d6a1123dc83cedb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 03:49:24,523 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 03:49:24,526 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 03:49:24,562 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 03:49:24,563 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 03:49:24,567 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 03:49:24,571 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 03:49:24,576 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 03:49:24,580 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 03:49:24,589 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 03:49:24,591 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 03:49:24,593 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 03:49:24,594 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 03:49:24,597 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 03:49:24,600 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 03:49:24,602 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 03:49:24,605 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 03:49:24,606 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 03:49:24,613 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 03:49:24,621 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 03:49:24,626 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 03:49:24,627 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 03:49:24,631 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 03:49:24,633 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 03:49:24,644 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 03:49:24,644 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 03:49:24,645 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 03:49:24,647 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 03:49:24,648 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 03:49:24,649 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 03:49:24,650 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 03:49:24,651 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 03:49:24,653 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 03:49:24,654 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 03:49:24,655 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 03:49:24,656 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 03:49:24,657 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 03:49:24,657 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 03:49:24,658 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 03:49:24,660 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 03:49:24,661 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 03:49:24,666 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-03 03:49:24,712 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 03:49:24,712 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 03:49:24,714 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 03:49:24,714 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 03:49:24,714 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 03:49:24,715 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 03:49:24,715 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 03:49:24,715 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 03:49:24,715 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 03:49:24,717 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 03:49:24,718 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 03:49:24,718 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 03:49:24,719 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 03:49:24,719 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 03:49:24,719 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 03:49:24,719 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 03:49:24,719 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 03:49:24,720 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 03:49:24,720 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 03:49:24,720 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 03:49:24,720 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 03:49:24,721 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 03:49:24,721 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 03:49:24,721 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 03:49:24,721 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 03:49:24,722 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 03:49:24,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:49:24,722 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 03:49:24,722 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 03:49:24,723 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 03:49:24,723 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 03:49:24,723 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 03:49:24,723 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 03:49:24,723 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 03:49:24,724 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 03:49:24,724 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_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5477c3156be335e627e6d8ad4c695e912cf982226281f4316d6a1123dc83cedb [2021-11-03 03:49:25,253 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 03:49:25,279 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 03:49:25,283 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 03:49:25,284 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 03:49:25,285 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 03:49:25,287 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/product-lines/elevator_spec1_product11.cil.c [2021-11-03 03:49:25,380 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/data/4d6d8cd61/797fa873a52a4c9ba40bd10c3459337a/FLAGed325a03d [2021-11-03 03:49:26,297 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 03:49:26,298 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/sv-benchmarks/c/product-lines/elevator_spec1_product11.cil.c [2021-11-03 03:49:26,338 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/data/4d6d8cd61/797fa873a52a4c9ba40bd10c3459337a/FLAGed325a03d [2021-11-03 03:49:26,849 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/data/4d6d8cd61/797fa873a52a4c9ba40bd10c3459337a [2021-11-03 03:49:26,852 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 03:49:26,854 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 03:49:26,855 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 03:49:26,856 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 03:49:26,871 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 03:49:26,872 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:49:26" (1/1) ... [2021-11-03 03:49:26,873 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dfb8af5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:49:26, skipping insertion in model container [2021-11-03 03:49:26,874 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:49:26" (1/1) ... [2021-11-03 03:49:26,883 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 03:49:27,011 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 03:49:27,552 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_948856b7-c0f7-4015-b668-a6b8a0126d81/sv-benchmarks/c/product-lines/elevator_spec1_product11.cil.c[40826,40839] [2021-11-03 03:49:27,691 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:49:27,707 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 03:49:27,726 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 03:49:27,841 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_948856b7-c0f7-4015-b668-a6b8a0126d81/sv-benchmarks/c/product-lines/elevator_spec1_product11.cil.c[40826,40839] [2021-11-03 03:49:27,889 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:49:27,896 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 03:49:27,984 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_948856b7-c0f7-4015-b668-a6b8a0126d81/sv-benchmarks/c/product-lines/elevator_spec1_product11.cil.c[40826,40839] [2021-11-03 03:49:28,072 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:49:28,123 INFO L208 MainTranslator]: Completed translation [2021-11-03 03:49:28,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:49:28 WrapperNode [2021-11-03 03:49:28,123 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 03:49:28,125 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 03:49:28,125 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 03:49:28,125 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 03:49:28,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:49:28" (1/1) ... [2021-11-03 03:49:28,216 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:49:28" (1/1) ... [2021-11-03 03:49:28,451 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 03:49:28,452 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 03:49:28,453 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 03:49:28,454 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 03:49:28,465 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:49:28" (1/1) ... [2021-11-03 03:49:28,466 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:49:28" (1/1) ... [2021-11-03 03:49:28,522 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:49:28" (1/1) ... [2021-11-03 03:49:28,522 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:49:28" (1/1) ... [2021-11-03 03:49:28,615 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:49:28" (1/1) ... [2021-11-03 03:49:28,721 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:49:28" (1/1) ... [2021-11-03 03:49:28,744 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:49:28" (1/1) ... [2021-11-03 03:49:28,780 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 03:49:28,782 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 03:49:28,784 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 03:49:28,784 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 03:49:28,785 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:49:28" (1/1) ... [2021-11-03 03:49:28,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:49:28,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:49:28,822 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 03:49:28,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 03:49:28,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 03:49:28,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 03:49:28,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 03:49:28,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 03:49:38,549 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 03:49:38,550 INFO L299 CfgBuilder]: Removed 553 assume(true) statements. [2021-11-03 03:49:38,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:49:38 BoogieIcfgContainer [2021-11-03 03:49:38,557 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 03:49:38,559 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 03:49:38,559 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 03:49:38,563 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 03:49:38,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:49:26" (1/3) ... [2021-11-03 03:49:38,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f635e38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:49:38, skipping insertion in model container [2021-11-03 03:49:38,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:49:28" (2/3) ... [2021-11-03 03:49:38,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f635e38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:49:38, skipping insertion in model container [2021-11-03 03:49:38,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:49:38" (3/3) ... [2021-11-03 03:49:38,567 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product11.cil.c [2021-11-03 03:49:38,574 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 03:49:38,574 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-03 03:49:38,651 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 03:49:38,658 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 [2021-11-03 03:49:38,658 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-03 03:49:38,736 INFO L276 IsEmpty]: Start isEmpty. Operand has 2411 states, 2405 states have (on average 1.8918918918918919) internal successors, (4550), 2410 states have internal predecessors, (4550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:49:38,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-03 03:49:38,765 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:49:38,766 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] [2021-11-03 03:49:38,767 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)] === [2021-11-03 03:49:38,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:49:38,774 INFO L85 PathProgramCache]: Analyzing trace with hash -522063209, now seen corresponding path program 1 times [2021-11-03 03:49:38,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:49:38,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2109062665] [2021-11-03 03:49:38,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:49:38,796 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:49:38,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:49:38,803 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:49:38,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 03:49:39,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:49:39,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-03 03:49:39,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:49:39,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:49:39,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:49:39,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:49:39,720 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:49:39,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2109062665] [2021-11-03 03:49:39,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2109062665] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:49:39,722 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:49:39,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 03:49:39,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331468398] [2021-11-03 03:49:39,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 03:49:39,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:49:39,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 03:49:39,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 03:49:39,762 INFO L87 Difference]: Start difference. First operand has 2411 states, 2405 states have (on average 1.8918918918918919) internal successors, (4550), 2410 states have internal predecessors, (4550), 0 states have call successors, (0), 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 26.5) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:49:39,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:49:39,971 INFO L93 Difference]: Finished difference Result 2430 states and 4573 transitions. [2021-11-03 03:49:39,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 03:49:39,972 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-03 03:49:39,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:49:40,014 INFO L225 Difference]: With dead ends: 2430 [2021-11-03 03:49:40,014 INFO L226 Difference]: Without dead ends: 2407 [2021-11-03 03:49:40,020 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 03:49:40,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2407 states. [2021-11-03 03:49:40,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2407 to 2407. [2021-11-03 03:49:40,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2407 states, 2402 states have (on average 1.8892589508742714) internal successors, (4538), 2406 states have internal predecessors, (4538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:49:40,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2407 states to 2407 states and 4538 transitions. [2021-11-03 03:49:40,239 INFO L78 Accepts]: Start accepts. Automaton has 2407 states and 4538 transitions. Word has length 53 [2021-11-03 03:49:40,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:49:40,240 INFO L470 AbstractCegarLoop]: Abstraction has 2407 states and 4538 transitions. [2021-11-03 03:49:40,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:49:40,241 INFO L276 IsEmpty]: Start isEmpty. Operand 2407 states and 4538 transitions. [2021-11-03 03:49:40,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-03 03:49:40,253 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:49:40,254 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:49:40,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 03:49:40,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:49:40,464 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)] === [2021-11-03 03:49:40,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:49:40,465 INFO L85 PathProgramCache]: Analyzing trace with hash 638752678, now seen corresponding path program 1 times [2021-11-03 03:49:40,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:49:40,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2089426323] [2021-11-03 03:49:40,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:49:40,467 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:49:40,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:49:40,469 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:49:40,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 03:49:40,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:49:40,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:49:40,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:49:41,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:49:41,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:49:41,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:49:41,365 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:49:41,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2089426323] [2021-11-03 03:49:41,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2089426323] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:49:41,366 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:49:41,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 03:49:41,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675493876] [2021-11-03 03:49:41,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:49:41,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:49:41,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:49:41,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:49:41,376 INFO L87 Difference]: Start difference. First operand 2407 states and 4538 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:49:41,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:49:41,844 INFO L93 Difference]: Finished difference Result 7141 states and 13471 transitions. [2021-11-03 03:49:41,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:49:41,845 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-03 03:49:41,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:49:41,889 INFO L225 Difference]: With dead ends: 7141 [2021-11-03 03:49:41,889 INFO L226 Difference]: Without dead ends: 4747 [2021-11-03 03:49:41,901 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:49:41,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4747 states. [2021-11-03 03:49:42,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4747 to 2407. [2021-11-03 03:49:42,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2407 states, 2402 states have (on average 1.8863447127393838) internal successors, (4531), 2406 states have internal predecessors, (4531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:49:42,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2407 states to 2407 states and 4531 transitions. [2021-11-03 03:49:42,060 INFO L78 Accepts]: Start accepts. Automaton has 2407 states and 4531 transitions. Word has length 55 [2021-11-03 03:49:42,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:49:42,061 INFO L470 AbstractCegarLoop]: Abstraction has 2407 states and 4531 transitions. [2021-11-03 03:49:42,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:49:42,063 INFO L276 IsEmpty]: Start isEmpty. Operand 2407 states and 4531 transitions. [2021-11-03 03:49:42,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-03 03:49:42,070 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:49:42,076 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] [2021-11-03 03:49:42,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 03:49:42,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:49:42,293 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)] === [2021-11-03 03:49:42,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:49:42,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1052635581, now seen corresponding path program 1 times [2021-11-03 03:49:42,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:49:42,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1556994892] [2021-11-03 03:49:42,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:49:42,296 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:49:42,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:49:42,304 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:49:42,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 03:49:42,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:49:42,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 03:49:42,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:49:42,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:49:42,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:49:43,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:49:43,248 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:49:43,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1556994892] [2021-11-03 03:49:43,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1556994892] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:49:43,249 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:49:43,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 03:49:43,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744224925] [2021-11-03 03:49:43,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:49:43,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:49:43,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:49:43,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:49:43,252 INFO L87 Difference]: Start difference. First operand 2407 states and 4531 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 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) [2021-11-03 03:49:44,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:49:44,578 INFO L93 Difference]: Finished difference Result 16324 states and 30769 transitions. [2021-11-03 03:49:44,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 03:49:44,579 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 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 61 [2021-11-03 03:49:44,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:49:44,715 INFO L225 Difference]: With dead ends: 16324 [2021-11-03 03:49:44,715 INFO L226 Difference]: Without dead ends: 13939 [2021-11-03 03:49:44,724 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-03 03:49:44,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13939 states. [2021-11-03 03:49:44,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13939 to 2385. [2021-11-03 03:49:44,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2385 states, 2380 states have (on average 1.8823529411764706) internal successors, (4480), 2384 states have internal predecessors, (4480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:49:44,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2385 states to 2385 states and 4480 transitions. [2021-11-03 03:49:44,964 INFO L78 Accepts]: Start accepts. Automaton has 2385 states and 4480 transitions. Word has length 61 [2021-11-03 03:49:44,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:49:44,964 INFO L470 AbstractCegarLoop]: Abstraction has 2385 states and 4480 transitions. [2021-11-03 03:49:44,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 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) [2021-11-03 03:49:44,966 INFO L276 IsEmpty]: Start isEmpty. Operand 2385 states and 4480 transitions. [2021-11-03 03:49:44,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-03 03:49:44,968 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:49:44,969 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:49:44,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 03:49:45,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:49:45,182 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)] === [2021-11-03 03:49:45,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:49:45,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1329517924, now seen corresponding path program 1 times [2021-11-03 03:49:45,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:49:45,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1780422134] [2021-11-03 03:49:45,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:49:45,187 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:49:45,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:49:45,188 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:49:45,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 03:49:45,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:49:45,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:49:45,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:49:45,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:49:45,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:49:46,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:49:46,182 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:49:46,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1780422134] [2021-11-03 03:49:46,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1780422134] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:49:46,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:49:46,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 03:49:46,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779829045] [2021-11-03 03:49:46,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:49:46,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:49:46,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:49:46,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:49:46,184 INFO L87 Difference]: Start difference. First operand 2385 states and 4480 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:49:46,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:49:46,721 INFO L93 Difference]: Finished difference Result 7052 states and 13275 transitions. [2021-11-03 03:49:46,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:49:46,722 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-03 03:49:46,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:49:46,737 INFO L225 Difference]: With dead ends: 7052 [2021-11-03 03:49:46,738 INFO L226 Difference]: Without dead ends: 4689 [2021-11-03 03:49:46,742 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:49:46,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4689 states. [2021-11-03 03:49:46,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4689 to 2385. [2021-11-03 03:49:46,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2385 states, 2380 states have (on average 1.8777310924369748) internal successors, (4469), 2384 states have internal predecessors, (4469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:49:46,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2385 states to 2385 states and 4469 transitions. [2021-11-03 03:49:46,920 INFO L78 Accepts]: Start accepts. Automaton has 2385 states and 4469 transitions. Word has length 63 [2021-11-03 03:49:46,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:49:46,921 INFO L470 AbstractCegarLoop]: Abstraction has 2385 states and 4469 transitions. [2021-11-03 03:49:46,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:49:46,922 INFO L276 IsEmpty]: Start isEmpty. Operand 2385 states and 4469 transitions. [2021-11-03 03:49:46,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-03 03:49:46,925 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:49:46,925 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:49:46,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 03:49:47,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:49:47,143 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)] === [2021-11-03 03:49:47,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:49:47,144 INFO L85 PathProgramCache]: Analyzing trace with hash -879379015, now seen corresponding path program 1 times [2021-11-03 03:49:47,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:49:47,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1250702354] [2021-11-03 03:49:47,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:49:47,146 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:49:47,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:49:47,150 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:49:47,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 03:49:47,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:49:47,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-03 03:49:47,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:49:48,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:49:48,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:49:48,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:49:48,273 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:49:48,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1250702354] [2021-11-03 03:49:48,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1250702354] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:49:48,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:49:48,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 03:49:48,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097383442] [2021-11-03 03:49:48,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 03:49:48,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:49:48,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 03:49:48,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 03:49:48,276 INFO L87 Difference]: Start difference. First operand 2385 states and 4469 transitions. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:49:51,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:49:51,097 INFO L93 Difference]: Finished difference Result 25479 states and 47993 transitions. [2021-11-03 03:49:51,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 03:49:51,098 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-03 03:49:51,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:49:51,182 INFO L225 Difference]: With dead ends: 25479 [2021-11-03 03:49:51,182 INFO L226 Difference]: Without dead ends: 23119 [2021-11-03 03:49:51,194 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-11-03 03:49:51,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23119 states. [2021-11-03 03:49:51,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23119 to 2387. [2021-11-03 03:49:51,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2387 states, 2382 states have (on average 1.874895046179681) internal successors, (4466), 2386 states have internal predecessors, (4466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:49:51,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2387 states to 2387 states and 4466 transitions. [2021-11-03 03:49:51,703 INFO L78 Accepts]: Start accepts. Automaton has 2387 states and 4466 transitions. Word has length 69 [2021-11-03 03:49:51,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:49:51,703 INFO L470 AbstractCegarLoop]: Abstraction has 2387 states and 4466 transitions. [2021-11-03 03:49:51,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:49:51,704 INFO L276 IsEmpty]: Start isEmpty. Operand 2387 states and 4466 transitions. [2021-11-03 03:49:51,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-03 03:49:51,707 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:49:51,708 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:49:51,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 03:49:51,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:49:51,935 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)] === [2021-11-03 03:49:51,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:49:51,936 INFO L85 PathProgramCache]: Analyzing trace with hash -2115626228, now seen corresponding path program 1 times [2021-11-03 03:49:51,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:49:51,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [499408322] [2021-11-03 03:49:51,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:49:51,938 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:49:51,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:49:51,940 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:49:51,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 03:49:52,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:49:52,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 03:49:52,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:49:52,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:49:52,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:49:53,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:49:53,113 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:49:53,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [499408322] [2021-11-03 03:49:53,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [499408322] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:49:53,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:49:53,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 03:49:53,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355716947] [2021-11-03 03:49:53,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 03:49:53,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:49:53,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 03:49:53,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 03:49:53,117 INFO L87 Difference]: Start difference. First operand 2387 states and 4466 transitions. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:49:55,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:49:55,471 INFO L93 Difference]: Finished difference Result 25447 states and 47914 transitions. [2021-11-03 03:49:55,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 03:49:55,485 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-03 03:49:55,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:49:55,566 INFO L225 Difference]: With dead ends: 25447 [2021-11-03 03:49:55,566 INFO L226 Difference]: Without dead ends: 23087 [2021-11-03 03:49:55,576 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-11-03 03:49:55,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23087 states. [2021-11-03 03:49:56,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23087 to 2391. [2021-11-03 03:49:56,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2391 states, 2386 states have (on average 1.8730092204526405) internal successors, (4469), 2390 states have internal predecessors, (4469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:49:56,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2391 states to 2391 states and 4469 transitions. [2021-11-03 03:49:56,052 INFO L78 Accepts]: Start accepts. Automaton has 2391 states and 4469 transitions. Word has length 71 [2021-11-03 03:49:56,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:49:56,054 INFO L470 AbstractCegarLoop]: Abstraction has 2391 states and 4469 transitions. [2021-11-03 03:49:56,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:49:56,054 INFO L276 IsEmpty]: Start isEmpty. Operand 2391 states and 4469 transitions. [2021-11-03 03:49:56,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-03 03:49:56,058 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:49:56,058 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:49:56,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 03:49:56,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:49:56,273 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)] === [2021-11-03 03:49:56,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:49:56,274 INFO L85 PathProgramCache]: Analyzing trace with hash -774884807, now seen corresponding path program 1 times [2021-11-03 03:49:56,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:49:56,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1441375525] [2021-11-03 03:49:56,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:49:56,276 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:49:56,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:49:56,277 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:49:56,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 03:49:56,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:49:56,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:49:56,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:49:57,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:49:57,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:49:57,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:49:57,346 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:49:57,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1441375525] [2021-11-03 03:49:57,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1441375525] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:49:57,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:49:57,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 03:49:57,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431601973] [2021-11-03 03:49:57,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:49:57,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:49:57,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:49:57,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:49:57,349 INFO L87 Difference]: Start difference. First operand 2391 states and 4469 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:49:57,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:49:57,523 INFO L93 Difference]: Finished difference Result 4730 states and 8869 transitions. [2021-11-03 03:49:57,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:49:57,524 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-03 03:49:57,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:49:57,531 INFO L225 Difference]: With dead ends: 4730 [2021-11-03 03:49:57,531 INFO L226 Difference]: Without dead ends: 2370 [2021-11-03 03:49:57,535 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:49:57,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2370 states. [2021-11-03 03:49:57,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2370 to 2370. [2021-11-03 03:49:57,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2370 states, 2365 states have (on average 1.8735729386892177) internal successors, (4431), 2369 states have internal predecessors, (4431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:49:57,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2370 states to 2370 states and 4431 transitions. [2021-11-03 03:49:57,713 INFO L78 Accepts]: Start accepts. Automaton has 2370 states and 4431 transitions. Word has length 73 [2021-11-03 03:49:57,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:49:57,713 INFO L470 AbstractCegarLoop]: Abstraction has 2370 states and 4431 transitions. [2021-11-03 03:49:57,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:49:57,715 INFO L276 IsEmpty]: Start isEmpty. Operand 2370 states and 4431 transitions. [2021-11-03 03:49:57,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-03 03:49:57,721 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:49:57,721 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:49:57,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 03:49:57,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:49:57,944 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)] === [2021-11-03 03:49:57,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:49:57,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1036948847, now seen corresponding path program 1 times [2021-11-03 03:49:57,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:49:57,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2033765960] [2021-11-03 03:49:57,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:49:57,946 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:49:57,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:49:57,948 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:49:57,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 03:49:58,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:49:58,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 03:49:58,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:49:58,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:49:58,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:49:58,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:49:58,977 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:49:58,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2033765960] [2021-11-03 03:49:58,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2033765960] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:49:58,977 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:49:58,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 03:49:58,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487216934] [2021-11-03 03:49:58,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:49:58,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:49:58,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:49:58,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:49:58,979 INFO L87 Difference]: Start difference. First operand 2370 states and 4431 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:49:59,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:49:59,234 INFO L93 Difference]: Finished difference Result 4674 states and 8772 transitions. [2021-11-03 03:49:59,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:49:59,235 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-03 03:49:59,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:49:59,242 INFO L225 Difference]: With dead ends: 4674 [2021-11-03 03:49:59,243 INFO L226 Difference]: Without dead ends: 2345 [2021-11-03 03:49:59,247 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 03:49:59,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2345 states. [2021-11-03 03:49:59,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2345 to 2345. [2021-11-03 03:49:59,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2345 states, 2340 states have (on average 1.8747863247863248) internal successors, (4387), 2344 states have internal predecessors, (4387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:49:59,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2345 states to 2345 states and 4387 transitions. [2021-11-03 03:49:59,458 INFO L78 Accepts]: Start accepts. Automaton has 2345 states and 4387 transitions. Word has length 74 [2021-11-03 03:49:59,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:49:59,459 INFO L470 AbstractCegarLoop]: Abstraction has 2345 states and 4387 transitions. [2021-11-03 03:49:59,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:49:59,459 INFO L276 IsEmpty]: Start isEmpty. Operand 2345 states and 4387 transitions. [2021-11-03 03:49:59,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-03 03:49:59,462 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:49:59,463 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:49:59,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 03:49:59,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:49:59,677 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)] === [2021-11-03 03:49:59,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:49:59,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1299233176, now seen corresponding path program 1 times [2021-11-03 03:49:59,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:49:59,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1091100642] [2021-11-03 03:49:59,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:49:59,678 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:49:59,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:49:59,679 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:49:59,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 03:50:00,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:50:00,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:50:00,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:50:00,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:50:00,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:50:00,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:50:00,704 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:50:00,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1091100642] [2021-11-03 03:50:00,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1091100642] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:50:00,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:50:00,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 03:50:00,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749864109] [2021-11-03 03:50:00,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:50:00,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:50:00,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:50:00,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:50:00,710 INFO L87 Difference]: Start difference. First operand 2345 states and 4387 transitions. Second operand has 4 states, 4 states have (on average 20.25) 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) [2021-11-03 03:50:00,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:50:00,955 INFO L93 Difference]: Finished difference Result 4649 states and 8728 transitions. [2021-11-03 03:50:00,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:50:00,956 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) 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 75 [2021-11-03 03:50:00,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:50:00,962 INFO L225 Difference]: With dead ends: 4649 [2021-11-03 03:50:00,962 INFO L226 Difference]: Without dead ends: 2342 [2021-11-03 03:50:00,967 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:50:00,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2342 states. [2021-11-03 03:50:01,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2342 to 2342. [2021-11-03 03:50:01,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2342 states, 2337 states have (on average 1.8737697903294823) internal successors, (4379), 2341 states have internal predecessors, (4379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:50:01,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2342 states to 2342 states and 4379 transitions. [2021-11-03 03:50:01,192 INFO L78 Accepts]: Start accepts. Automaton has 2342 states and 4379 transitions. Word has length 75 [2021-11-03 03:50:01,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:50:01,193 INFO L470 AbstractCegarLoop]: Abstraction has 2342 states and 4379 transitions. [2021-11-03 03:50:01,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) 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) [2021-11-03 03:50:01,193 INFO L276 IsEmpty]: Start isEmpty. Operand 2342 states and 4379 transitions. [2021-11-03 03:50:01,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-03 03:50:01,196 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:50:01,196 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] [2021-11-03 03:50:01,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-11-03 03:50:01,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:50:01,413 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)] === [2021-11-03 03:50:01,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:50:01,413 INFO L85 PathProgramCache]: Analyzing trace with hash 853573783, now seen corresponding path program 1 times [2021-11-03 03:50:01,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:50:01,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [827778330] [2021-11-03 03:50:01,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:50:01,415 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:50:01,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:50:01,416 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:50:01,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 03:50:02,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:50:02,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-03 03:50:02,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:50:02,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:50:02,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:50:02,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:50:02,511 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:50:02,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [827778330] [2021-11-03 03:50:02,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [827778330] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:50:02,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:50:02,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 03:50:02,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179386243] [2021-11-03 03:50:02,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 03:50:02,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:50:02,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 03:50:02,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 03:50:02,513 INFO L87 Difference]: Start difference. First operand 2342 states and 4379 transitions. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2021-11-03 03:50:02,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:50:02,804 INFO L93 Difference]: Finished difference Result 4640 states and 8710 transitions. [2021-11-03 03:50:02,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 03:50:02,804 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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 76 [2021-11-03 03:50:02,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:50:02,811 INFO L225 Difference]: With dead ends: 4640 [2021-11-03 03:50:02,811 INFO L226 Difference]: Without dead ends: 2340 [2021-11-03 03:50:02,814 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-03 03:50:02,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2340 states. [2021-11-03 03:50:02,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2340 to 2340. [2021-11-03 03:50:02,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2340 states, 2335 states have (on average 1.8728051391862954) internal successors, (4373), 2339 states have internal predecessors, (4373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:50:02,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2340 states to 2340 states and 4373 transitions. [2021-11-03 03:50:02,955 INFO L78 Accepts]: Start accepts. Automaton has 2340 states and 4373 transitions. Word has length 76 [2021-11-03 03:50:02,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:50:02,956 INFO L470 AbstractCegarLoop]: Abstraction has 2340 states and 4373 transitions. [2021-11-03 03:50:02,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 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) [2021-11-03 03:50:02,957 INFO L276 IsEmpty]: Start isEmpty. Operand 2340 states and 4373 transitions. [2021-11-03 03:50:02,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-03 03:50:02,959 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:50:02,959 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:50:02,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 03:50:03,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:50:03,173 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)] === [2021-11-03 03:50:03,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:50:03,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1794490083, now seen corresponding path program 1 times [2021-11-03 03:50:03,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:50:03,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1503218493] [2021-11-03 03:50:03,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:50:03,174 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:50:03,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:50:03,176 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:50:03,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 03:50:03,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:50:03,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 03:50:03,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:50:04,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:50:04,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:50:04,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:50:04,403 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:50:04,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1503218493] [2021-11-03 03:50:04,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1503218493] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:50:04,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:50:04,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 03:50:04,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278494745] [2021-11-03 03:50:04,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 03:50:04,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:50:04,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 03:50:04,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 03:50:04,414 INFO L87 Difference]: Start difference. First operand 2340 states and 4373 transitions. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:50:04,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:50:04,607 INFO L93 Difference]: Finished difference Result 4633 states and 8695 transitions. [2021-11-03 03:50:04,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 03:50:04,608 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-03 03:50:04,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:50:04,611 INFO L225 Difference]: With dead ends: 4633 [2021-11-03 03:50:04,612 INFO L226 Difference]: Without dead ends: 2338 [2021-11-03 03:50:04,616 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-03 03:50:04,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2338 states. [2021-11-03 03:50:04,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2338 to 2338. [2021-11-03 03:50:04,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2338 states, 2333 states have (on average 1.8718388341191599) internal successors, (4367), 2337 states have internal predecessors, (4367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:50:04,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2338 states to 2338 states and 4367 transitions. [2021-11-03 03:50:04,780 INFO L78 Accepts]: Start accepts. Automaton has 2338 states and 4367 transitions. Word has length 77 [2021-11-03 03:50:04,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:50:04,780 INFO L470 AbstractCegarLoop]: Abstraction has 2338 states and 4367 transitions. [2021-11-03 03:50:04,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:50:04,781 INFO L276 IsEmpty]: Start isEmpty. Operand 2338 states and 4367 transitions. [2021-11-03 03:50:04,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-03 03:50:04,783 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:50:04,783 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] [2021-11-03 03:50:04,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 03:50:04,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:50:04,993 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)] === [2021-11-03 03:50:04,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:50:04,993 INFO L85 PathProgramCache]: Analyzing trace with hash -490445438, now seen corresponding path program 1 times [2021-11-03 03:50:04,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:50:04,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1113051533] [2021-11-03 03:50:04,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:50:04,994 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:50:04,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:50:04,995 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:50:04,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 03:50:05,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:50:05,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 03:50:05,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:50:05,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:50:05,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:50:06,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:50:06,243 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:50:06,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1113051533] [2021-11-03 03:50:06,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1113051533] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:50:06,244 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:50:06,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 03:50:06,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775378821] [2021-11-03 03:50:06,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:50:06,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:50:06,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:50:06,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:50:06,246 INFO L87 Difference]: Start difference. First operand 2338 states and 4367 transitions. Second operand has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:50:08,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:50:08,298 INFO L93 Difference]: Finished difference Result 8448 states and 15887 transitions. [2021-11-03 03:50:08,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 03:50:08,299 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 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 78 [2021-11-03 03:50:08,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:50:08,308 INFO L225 Difference]: With dead ends: 8448 [2021-11-03 03:50:08,308 INFO L226 Difference]: Without dead ends: 6161 [2021-11-03 03:50:08,312 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-03 03:50:08,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6161 states. [2021-11-03 03:50:08,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6161 to 2338. [2021-11-03 03:50:08,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2338 states, 2333 states have (on average 1.8281183026146592) internal successors, (4265), 2337 states have internal predecessors, (4265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:50:08,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2338 states to 2338 states and 4265 transitions. [2021-11-03 03:50:08,505 INFO L78 Accepts]: Start accepts. Automaton has 2338 states and 4265 transitions. Word has length 78 [2021-11-03 03:50:08,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:50:08,506 INFO L470 AbstractCegarLoop]: Abstraction has 2338 states and 4265 transitions. [2021-11-03 03:50:08,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:50:08,506 INFO L276 IsEmpty]: Start isEmpty. Operand 2338 states and 4265 transitions. [2021-11-03 03:50:08,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-03 03:50:08,509 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:50:08,509 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] [2021-11-03 03:50:08,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 03:50:08,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:50:08,721 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)] === [2021-11-03 03:50:08,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:50:08,721 INFO L85 PathProgramCache]: Analyzing trace with hash -88309266, now seen corresponding path program 1 times [2021-11-03 03:50:08,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:50:08,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [299115333] [2021-11-03 03:50:08,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:50:08,722 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:50:08,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:50:08,724 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:50:08,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 03:50:09,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:50:09,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 03:50:09,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:50:09,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:50:09,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:50:09,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:50:09,998 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:50:09,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [299115333] [2021-11-03 03:50:09,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [299115333] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:50:09,998 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:50:09,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 03:50:09,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595106702] [2021-11-03 03:50:09,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:50:10,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:50:10,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:50:10,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:50:10,001 INFO L87 Difference]: Start difference. First operand 2338 states and 4265 transitions. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:50:11,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:50:11,112 INFO L93 Difference]: Finished difference Result 6493 states and 12002 transitions. [2021-11-03 03:50:11,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 03:50:11,113 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-03 03:50:11,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:50:11,119 INFO L225 Difference]: With dead ends: 6493 [2021-11-03 03:50:11,120 INFO L226 Difference]: Without dead ends: 4224 [2021-11-03 03:50:11,123 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-03 03:50:11,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4224 states. [2021-11-03 03:50:11,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4224 to 2304. [2021-11-03 03:50:11,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2304 states, 2299 states have (on average 1.8281861678990865) internal successors, (4203), 2303 states have internal predecessors, (4203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:50:11,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2304 states to 2304 states and 4203 transitions. [2021-11-03 03:50:11,329 INFO L78 Accepts]: Start accepts. Automaton has 2304 states and 4203 transitions. Word has length 86 [2021-11-03 03:50:11,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:50:11,330 INFO L470 AbstractCegarLoop]: Abstraction has 2304 states and 4203 transitions. [2021-11-03 03:50:11,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:50:11,330 INFO L276 IsEmpty]: Start isEmpty. Operand 2304 states and 4203 transitions. [2021-11-03 03:50:11,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-03 03:50:11,333 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:50:11,333 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, 1] [2021-11-03 03:50:11,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 03:50:11,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:50:11,551 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)] === [2021-11-03 03:50:11,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:50:11,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1464743218, now seen corresponding path program 1 times [2021-11-03 03:50:11,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:50:11,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1650401666] [2021-11-03 03:50:11,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:50:11,552 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:50:11,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:50:11,553 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:50:11,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 03:50:12,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:50:12,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:50:12,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:50:12,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:50:12,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:50:12,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:50:12,924 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:50:12,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1650401666] [2021-11-03 03:50:12,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1650401666] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:50:12,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:50:12,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 03:50:12,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945820375] [2021-11-03 03:50:12,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 03:50:12,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:50:12,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 03:50:12,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:50:12,926 INFO L87 Difference]: Start difference. First operand 2304 states and 4203 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:50:14,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:50:14,655 INFO L93 Difference]: Finished difference Result 9062 states and 16705 transitions. [2021-11-03 03:50:14,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 03:50:14,655 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 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 88 [2021-11-03 03:50:14,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:50:14,665 INFO L225 Difference]: With dead ends: 9062 [2021-11-03 03:50:14,666 INFO L226 Difference]: Without dead ends: 6826 [2021-11-03 03:50:14,670 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 03:50:14,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6826 states. [2021-11-03 03:50:14,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6826 to 2308. [2021-11-03 03:50:14,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2308 states, 2303 states have (on average 1.8267477203647415) internal successors, (4207), 2307 states have internal predecessors, (4207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:50:14,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2308 states to 2308 states and 4207 transitions. [2021-11-03 03:50:14,933 INFO L78 Accepts]: Start accepts. Automaton has 2308 states and 4207 transitions. Word has length 88 [2021-11-03 03:50:14,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:50:14,934 INFO L470 AbstractCegarLoop]: Abstraction has 2308 states and 4207 transitions. [2021-11-03 03:50:14,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:50:14,934 INFO L276 IsEmpty]: Start isEmpty. Operand 2308 states and 4207 transitions. [2021-11-03 03:50:14,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-03 03:50:14,937 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:50:14,938 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, 1, 1] [2021-11-03 03:50:14,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-03 03:50:15,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:50:15,157 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)] === [2021-11-03 03:50:15,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:50:15,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1373180783, now seen corresponding path program 1 times [2021-11-03 03:50:15,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:50:15,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1917979056] [2021-11-03 03:50:15,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:50:15,159 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:50:15,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:50:15,160 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:50:15,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 03:50:15,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:50:15,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 03:50:15,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:50:16,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:50:16,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:50:16,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:50:16,523 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:50:16,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1917979056] [2021-11-03 03:50:16,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1917979056] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:50:16,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:50:16,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 03:50:16,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931836035] [2021-11-03 03:50:16,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:50:16,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:50:16,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:50:16,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:50:16,526 INFO L87 Difference]: Start difference. First operand 2308 states and 4207 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:50:18,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:50:18,053 INFO L93 Difference]: Finished difference Result 6386 states and 11734 transitions. [2021-11-03 03:50:18,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 03:50:18,053 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 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 89 [2021-11-03 03:50:18,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:50:18,059 INFO L225 Difference]: With dead ends: 6386 [2021-11-03 03:50:18,059 INFO L226 Difference]: Without dead ends: 4133 [2021-11-03 03:50:18,061 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:50:18,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4133 states. [2021-11-03 03:50:18,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4133 to 3154. [2021-11-03 03:50:18,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3154 states, 3149 states have (on average 1.8135916163861543) internal successors, (5711), 3153 states have internal predecessors, (5711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:50:18,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3154 states to 3154 states and 5711 transitions. [2021-11-03 03:50:18,486 INFO L78 Accepts]: Start accepts. Automaton has 3154 states and 5711 transitions. Word has length 89 [2021-11-03 03:50:18,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:50:18,487 INFO L470 AbstractCegarLoop]: Abstraction has 3154 states and 5711 transitions. [2021-11-03 03:50:18,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:50:18,487 INFO L276 IsEmpty]: Start isEmpty. Operand 3154 states and 5711 transitions. [2021-11-03 03:50:18,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-03 03:50:18,506 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:50:18,506 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, 1, 1, 1, 1] [2021-11-03 03:50:18,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 03:50:18,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:50:18,726 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)] === [2021-11-03 03:50:18,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:50:18,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1693401207, now seen corresponding path program 1 times [2021-11-03 03:50:18,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:50:18,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [753548908] [2021-11-03 03:50:18,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:50:18,727 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:50:18,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:50:18,728 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:50:18,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 03:50:19,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:50:19,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:50:19,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:50:19,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:50:19,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:50:20,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:50:20,202 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:50:20,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [753548908] [2021-11-03 03:50:20,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [753548908] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:50:20,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:50:20,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 03:50:20,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767117399] [2021-11-03 03:50:20,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 03:50:20,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:50:20,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 03:50:20,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:50:20,204 INFO L87 Difference]: Start difference. First operand 3154 states and 5711 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:50:21,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:50:21,850 INFO L93 Difference]: Finished difference Result 22564 states and 41247 transitions. [2021-11-03 03:50:21,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 03:50:21,851 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 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 91 [2021-11-03 03:50:21,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:50:21,877 INFO L225 Difference]: With dead ends: 22564 [2021-11-03 03:50:21,877 INFO L226 Difference]: Without dead ends: 19474 [2021-11-03 03:50:21,882 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 03:50:21,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19474 states. [2021-11-03 03:50:22,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19474 to 5759. [2021-11-03 03:50:22,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5759 states, 5754 states have (on average 1.8277719847062912) internal successors, (10517), 5758 states have internal predecessors, (10517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:50:22,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5759 states to 5759 states and 10517 transitions. [2021-11-03 03:50:22,377 INFO L78 Accepts]: Start accepts. Automaton has 5759 states and 10517 transitions. Word has length 91 [2021-11-03 03:50:22,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:50:22,377 INFO L470 AbstractCegarLoop]: Abstraction has 5759 states and 10517 transitions. [2021-11-03 03:50:22,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:50:22,378 INFO L276 IsEmpty]: Start isEmpty. Operand 5759 states and 10517 transitions. [2021-11-03 03:50:22,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-03 03:50:22,381 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:50:22,381 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, 1, 1, 1, 1] [2021-11-03 03:50:22,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-03 03:50:22,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:50:22,597 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)] === [2021-11-03 03:50:22,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:50:22,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1968160821, now seen corresponding path program 1 times [2021-11-03 03:50:22,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:50:22,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1104929548] [2021-11-03 03:50:22,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:50:22,598 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:50:22,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:50:22,599 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:50:22,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 03:50:23,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:50:23,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 03:50:23,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:50:23,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:50:23,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:50:24,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:50:24,108 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:50:24,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1104929548] [2021-11-03 03:50:24,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1104929548] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:50:24,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:50:24,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 03:50:24,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040648221] [2021-11-03 03:50:24,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:50:24,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:50:24,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:50:24,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:50:24,111 INFO L87 Difference]: Start difference. First operand 5759 states and 10517 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:50:25,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:50:25,227 INFO L93 Difference]: Finished difference Result 10444 states and 19004 transitions. [2021-11-03 03:50:25,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-03 03:50:25,228 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 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 91 [2021-11-03 03:50:25,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:50:25,238 INFO L225 Difference]: With dead ends: 10444 [2021-11-03 03:50:25,238 INFO L226 Difference]: Without dead ends: 7930 [2021-11-03 03:50:25,242 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-03 03:50:25,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7930 states. [2021-11-03 03:50:25,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7930 to 5749. [2021-11-03 03:50:25,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5749 states, 5744 states have (on average 1.8274721448467968) internal successors, (10497), 5748 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:50:25,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5749 states to 5749 states and 10497 transitions. [2021-11-03 03:50:25,693 INFO L78 Accepts]: Start accepts. Automaton has 5749 states and 10497 transitions. Word has length 91 [2021-11-03 03:50:25,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:50:25,693 INFO L470 AbstractCegarLoop]: Abstraction has 5749 states and 10497 transitions. [2021-11-03 03:50:25,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:50:25,693 INFO L276 IsEmpty]: Start isEmpty. Operand 5749 states and 10497 transitions. [2021-11-03 03:50:25,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-03 03:50:25,695 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:50:25,695 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, 1, 1, 1, 1, 1, 1] [2021-11-03 03:50:25,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-03 03:50:25,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:50:25,896 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)] === [2021-11-03 03:50:25,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:50:25,896 INFO L85 PathProgramCache]: Analyzing trace with hash -928141317, now seen corresponding path program 1 times [2021-11-03 03:50:25,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:50:25,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1166663550] [2021-11-03 03:50:25,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:50:25,897 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:50:25,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:50:25,898 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:50:25,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 03:50:26,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:50:26,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 03:50:26,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:50:27,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:50:27,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:50:27,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:50:27,302 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:50:27,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1166663550] [2021-11-03 03:50:27,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1166663550] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:50:27,303 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:50:27,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 03:50:27,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132975996] [2021-11-03 03:50:27,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 03:50:27,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:50:27,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 03:50:27,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:50:27,305 INFO L87 Difference]: Start difference. First operand 5749 states and 10497 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:50:28,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:50:28,278 INFO L93 Difference]: Finished difference Result 17565 states and 32166 transitions. [2021-11-03 03:50:28,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 03:50:28,279 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 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 93 [2021-11-03 03:50:28,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:50:28,299 INFO L225 Difference]: With dead ends: 17565 [2021-11-03 03:50:28,299 INFO L226 Difference]: Without dead ends: 15057 [2021-11-03 03:50:28,305 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 03:50:28,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15057 states. [2021-11-03 03:50:28,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15057 to 7996. [2021-11-03 03:50:28,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7996 states, 7991 states have (on average 1.8217995244650231) internal successors, (14558), 7995 states have internal predecessors, (14558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:50:28,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7996 states to 7996 states and 14558 transitions. [2021-11-03 03:50:28,881 INFO L78 Accepts]: Start accepts. Automaton has 7996 states and 14558 transitions. Word has length 93 [2021-11-03 03:50:28,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:50:28,881 INFO L470 AbstractCegarLoop]: Abstraction has 7996 states and 14558 transitions. [2021-11-03 03:50:28,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:50:28,882 INFO L276 IsEmpty]: Start isEmpty. Operand 7996 states and 14558 transitions. [2021-11-03 03:50:28,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-03 03:50:28,884 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:50:28,884 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:50:28,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-03 03:50:29,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:50:29,085 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)] === [2021-11-03 03:50:29,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:50:29,086 INFO L85 PathProgramCache]: Analyzing trace with hash 532396301, now seen corresponding path program 1 times [2021-11-03 03:50:29,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:50:29,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1739447482] [2021-11-03 03:50:29,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:50:29,086 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:50:29,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:50:29,087 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:50:29,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-03 03:50:29,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:50:29,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 03:50:29,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:50:30,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:50:30,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:50:30,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:50:30,581 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:50:30,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1739447482] [2021-11-03 03:50:30,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1739447482] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:50:30,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:50:30,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 03:50:30,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384462372] [2021-11-03 03:50:30,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:50:30,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:50:30,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:50:30,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:50:30,583 INFO L87 Difference]: Start difference. First operand 7996 states and 14558 transitions. Second operand has 6 states, 6 states have (on average 28.166666666666668) internal successors, (169), 5 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:50:33,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:50:33,708 INFO L93 Difference]: Finished difference Result 35269 states and 64665 transitions. [2021-11-03 03:50:33,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 03:50:33,708 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.166666666666668) internal successors, (169), 5 states have internal predecessors, (169), 0 states have call successors, (0), 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 95 [2021-11-03 03:50:33,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:50:33,746 INFO L225 Difference]: With dead ends: 35269 [2021-11-03 03:50:33,747 INFO L226 Difference]: Without dead ends: 30514 [2021-11-03 03:50:33,755 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-03 03:50:33,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30514 states. [2021-11-03 03:50:34,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30514 to 11622. [2021-11-03 03:50:34,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11622 states, 11617 states have (on average 1.8308513385555651) internal successors, (21269), 11621 states have internal predecessors, (21269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:50:34,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11622 states to 11622 states and 21269 transitions. [2021-11-03 03:50:34,674 INFO L78 Accepts]: Start accepts. Automaton has 11622 states and 21269 transitions. Word has length 95 [2021-11-03 03:50:34,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:50:34,674 INFO L470 AbstractCegarLoop]: Abstraction has 11622 states and 21269 transitions. [2021-11-03 03:50:34,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.166666666666668) internal successors, (169), 5 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:50:34,674 INFO L276 IsEmpty]: Start isEmpty. Operand 11622 states and 21269 transitions. [2021-11-03 03:50:34,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-03 03:50:34,678 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:50:34,678 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:50:34,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-03 03:50:34,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:50:34,895 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)] === [2021-11-03 03:50:34,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:50:34,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1749900262, now seen corresponding path program 1 times [2021-11-03 03:50:34,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:50:34,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1853237758] [2021-11-03 03:50:34,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:50:34,896 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:50:34,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:50:34,898 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:50:34,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-03 03:50:35,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:50:35,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:50:35,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:50:36,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:50:36,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:50:36,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:50:36,348 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:50:36,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1853237758] [2021-11-03 03:50:36,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1853237758] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:50:36,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:50:36,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 03:50:36,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621043858] [2021-11-03 03:50:36,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:50:36,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:50:36,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:50:36,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:50:36,350 INFO L87 Difference]: Start difference. First operand 11622 states and 21269 transitions. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:50:37,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:50:37,090 INFO L93 Difference]: Finished difference Result 20135 states and 36734 transitions. [2021-11-03 03:50:37,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:50:37,090 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 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 102 [2021-11-03 03:50:37,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:50:37,105 INFO L225 Difference]: With dead ends: 20135 [2021-11-03 03:50:37,105 INFO L226 Difference]: Without dead ends: 11637 [2021-11-03 03:50:37,115 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 03:50:37,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11637 states. [2021-11-03 03:50:37,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11637 to 11622. [2021-11-03 03:50:37,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11622 states, 11617 states have (on average 1.8213824567444263) internal successors, (21159), 11621 states have internal predecessors, (21159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:50:37,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11622 states to 11622 states and 21159 transitions. [2021-11-03 03:50:37,919 INFO L78 Accepts]: Start accepts. Automaton has 11622 states and 21159 transitions. Word has length 102 [2021-11-03 03:50:37,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:50:37,919 INFO L470 AbstractCegarLoop]: Abstraction has 11622 states and 21159 transitions. [2021-11-03 03:50:37,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:50:37,919 INFO L276 IsEmpty]: Start isEmpty. Operand 11622 states and 21159 transitions. [2021-11-03 03:50:37,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-03 03:50:37,923 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:50:37,923 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:50:37,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-03 03:50:38,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:50:38,132 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 03:50:38,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:50:38,133 INFO L85 PathProgramCache]: Analyzing trace with hash -615205102, now seen corresponding path program 1 times [2021-11-03 03:50:38,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:50:38,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1637363134] [2021-11-03 03:50:38,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:50:38,134 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:50:38,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:50:38,135 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:50:38,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-03 03:50:39,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:50:39,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 03:50:39,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:50:39,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:50:39,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:50:39,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:50:39,767 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:50:39,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1637363134] [2021-11-03 03:50:39,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1637363134] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:50:39,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:50:39,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-03 03:50:39,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996817886] [2021-11-03 03:50:39,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 03:50:39,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:50:39,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 03:50:39,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-03 03:50:39,770 INFO L87 Difference]: Start difference. First operand 11622 states and 21159 transitions. Second operand has 10 states, 10 states have (on average 19.7) internal successors, (197), 9 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:50:49,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:50:49,410 INFO L93 Difference]: Finished difference Result 67105 states and 120961 transitions. [2021-11-03 03:50:49,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-03 03:50:49,415 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 19.7) internal successors, (197), 9 states have internal predecessors, (197), 0 states have call successors, (0), 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 103 [2021-11-03 03:50:49,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:50:49,495 INFO L225 Difference]: With dead ends: 67105 [2021-11-03 03:50:49,495 INFO L226 Difference]: Without dead ends: 57006 [2021-11-03 03:50:49,508 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=905, Unknown=0, NotChecked=0, Total=1190 [2021-11-03 03:50:49,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57006 states. [2021-11-03 03:50:51,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57006 to 23774. [2021-11-03 03:50:51,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23774 states, 23769 states have (on average 1.8131179267112625) internal successors, (43096), 23773 states have internal predecessors, (43096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:50:51,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23774 states to 23774 states and 43096 transitions. [2021-11-03 03:50:51,451 INFO L78 Accepts]: Start accepts. Automaton has 23774 states and 43096 transitions. Word has length 103 [2021-11-03 03:50:51,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:50:51,451 INFO L470 AbstractCegarLoop]: Abstraction has 23774 states and 43096 transitions. [2021-11-03 03:50:51,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.7) internal successors, (197), 9 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:50:51,452 INFO L276 IsEmpty]: Start isEmpty. Operand 23774 states and 43096 transitions. [2021-11-03 03:50:51,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-03 03:50:51,455 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:50:51,455 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:50:51,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-03 03:50:51,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:50:51,672 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 03:50:51,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:50:51,672 INFO L85 PathProgramCache]: Analyzing trace with hash 2023860415, now seen corresponding path program 1 times [2021-11-03 03:50:51,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:50:51,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [467043616] [2021-11-03 03:50:51,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:50:51,673 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:50:51,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:50:51,674 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:50:51,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-03 03:50:52,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:50:52,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:50:52,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:50:53,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:50:53,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:50:53,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:50:53,255 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:50:53,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [467043616] [2021-11-03 03:50:53,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [467043616] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:50:53,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:50:53,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 03:50:53,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503020961] [2021-11-03 03:50:53,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 03:50:53,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:50:53,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 03:50:53,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:50:53,257 INFO L87 Difference]: Start difference. First operand 23774 states and 43096 transitions. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:03,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:51:03,600 INFO L93 Difference]: Finished difference Result 120311 states and 213707 transitions. [2021-11-03 03:51:03,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 03:51:03,603 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 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 104 [2021-11-03 03:51:03,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:51:03,754 INFO L225 Difference]: With dead ends: 120311 [2021-11-03 03:51:03,754 INFO L226 Difference]: Without dead ends: 100046 [2021-11-03 03:51:03,774 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 03:51:03,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100046 states. [2021-11-03 03:51:07,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100046 to 29346. [2021-11-03 03:51:07,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29346 states, 29341 states have (on average 1.7515762925598992) internal successors, (51393), 29345 states have internal predecessors, (51393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:07,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29346 states to 29346 states and 51393 transitions. [2021-11-03 03:51:07,477 INFO L78 Accepts]: Start accepts. Automaton has 29346 states and 51393 transitions. Word has length 104 [2021-11-03 03:51:07,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:51:07,477 INFO L470 AbstractCegarLoop]: Abstraction has 29346 states and 51393 transitions. [2021-11-03 03:51:07,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:07,477 INFO L276 IsEmpty]: Start isEmpty. Operand 29346 states and 51393 transitions. [2021-11-03 03:51:07,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-03 03:51:07,481 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:51:07,481 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:51:07,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-03 03:51:07,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:51:07,697 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 03:51:07,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:51:07,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1458342339, now seen corresponding path program 1 times [2021-11-03 03:51:07,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:51:07,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [99630545] [2021-11-03 03:51:07,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:51:07,699 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:51:07,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:51:07,700 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:51:07,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-03 03:51:08,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:51:08,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 03:51:08,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:51:09,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:09,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:51:09,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:09,444 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:51:09,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [99630545] [2021-11-03 03:51:09,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [99630545] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:51:09,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:51:09,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 03:51:09,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420738745] [2021-11-03 03:51:09,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:51:09,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:51:09,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:51:09,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:51:09,446 INFO L87 Difference]: Start difference. First operand 29346 states and 51393 transitions. Second operand has 6 states, 6 states have (on average 32.0) internal successors, (192), 5 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:16,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:51:16,815 INFO L93 Difference]: Finished difference Result 89500 states and 156765 transitions. [2021-11-03 03:51:16,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 03:51:16,816 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 32.0) internal successors, (192), 5 states have internal predecessors, (192), 0 states have call successors, (0), 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 104 [2021-11-03 03:51:16,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:51:16,904 INFO L225 Difference]: With dead ends: 89500 [2021-11-03 03:51:16,904 INFO L226 Difference]: Without dead ends: 64035 [2021-11-03 03:51:16,922 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-03 03:51:16,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64035 states. [2021-11-03 03:51:20,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64035 to 28188. [2021-11-03 03:51:20,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28188 states, 28183 states have (on average 1.7425398289749139) internal successors, (49110), 28187 states have internal predecessors, (49110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:20,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28188 states to 28188 states and 49110 transitions. [2021-11-03 03:51:20,392 INFO L78 Accepts]: Start accepts. Automaton has 28188 states and 49110 transitions. Word has length 104 [2021-11-03 03:51:20,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:51:20,392 INFO L470 AbstractCegarLoop]: Abstraction has 28188 states and 49110 transitions. [2021-11-03 03:51:20,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 32.0) internal successors, (192), 5 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:20,392 INFO L276 IsEmpty]: Start isEmpty. Operand 28188 states and 49110 transitions. [2021-11-03 03:51:20,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-03 03:51:20,395 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:51:20,395 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:51:20,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-03 03:51:20,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:51:20,602 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 03:51:20,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:51:20,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1847460159, now seen corresponding path program 1 times [2021-11-03 03:51:20,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:51:20,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1503933730] [2021-11-03 03:51:20,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:51:20,603 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:51:20,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:51:20,604 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:51:20,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_948856b7-c0f7-4015-b668-a6b8a0126d81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-03 03:51:21,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:51:21,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 03:51:21,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:51:22,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:22,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:51:22,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:22,291 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:51:22,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1503933730] [2021-11-03 03:51:22,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1503933730] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:51:22,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:51:22,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 03:51:22,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937545581] [2021-11-03 03:51:22,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:51:22,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:51:22,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:51:22,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:51:22,293 INFO L87 Difference]: Start difference. First operand 28188 states and 49110 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:24,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:51:24,727 INFO L93 Difference]: Finished difference Result 48609 states and 85436 transitions. [2021-11-03 03:51:24,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:51:24,727 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 0 states have call successors, (0), 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 104 [2021-11-03 03:51:24,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:51:24,754 INFO L225 Difference]: With dead ends: 48609 [2021-11-03 03:51:24,754 INFO L226 Difference]: Without dead ends: 23906 [2021-11-03 03:51:24,767 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:51:24,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23906 states.