./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product24.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_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/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_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product24.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/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_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/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 e942074e046d4b6eec963a95d600daf33500a37aba1da700aae37a309fea4cda --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:55:48,798 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:55:48,800 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:55:48,832 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:55:48,833 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:55:48,834 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:55:48,836 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:55:48,839 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:55:48,841 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:55:48,842 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:55:48,844 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:55:48,845 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:55:48,846 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:55:48,847 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:55:48,849 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:55:48,850 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:55:48,851 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:55:48,853 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:55:48,855 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:55:48,857 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:55:48,859 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:55:48,861 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:55:48,862 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:55:48,863 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:55:48,868 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:55:48,868 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:55:48,868 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:55:48,869 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:55:48,870 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:55:48,871 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:55:48,872 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:55:48,873 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:55:48,874 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:55:48,875 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:55:48,876 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:55:48,876 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:55:48,876 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:55:48,876 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:55:48,877 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:55:48,877 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:55:48,878 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:55:48,879 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 04:55:48,905 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:55:48,905 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:55:48,906 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:55:48,906 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:55:48,907 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:55:48,907 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:55:48,907 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:55:48,907 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:55:48,907 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:55:48,908 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:55:48,908 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:55:48,908 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:55:48,908 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:55:48,909 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:55:48,909 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:55:48,909 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:55:48,910 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:55:48,910 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:55:48,910 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:55:48,910 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:55:48,911 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:55:48,911 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:55:48,911 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:55:48,911 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:55:48,911 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:55:48,912 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:55:48,912 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:55:48,912 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:55:48,912 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:55:48,912 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:55:48,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:55:48,913 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:55:48,913 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:55:48,913 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:55:48,913 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:55:48,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:55:48,914 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:55:48,914 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:55:48,914 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:55:48,914 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_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e942074e046d4b6eec963a95d600daf33500a37aba1da700aae37a309fea4cda [2021-11-03 04:55:49,163 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:55:49,187 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:55:49,190 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:55:49,192 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:55:49,193 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:55:49,193 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/product-lines/elevator_spec2_product24.cil.c [2021-11-03 04:55:49,286 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/data/72805838a/f785d1300c8f47ceb9de78fd94c47452/FLAGcc5febc80 [2021-11-03 04:55:49,873 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:55:49,874 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/sv-benchmarks/c/product-lines/elevator_spec2_product24.cil.c [2021-11-03 04:55:49,895 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/data/72805838a/f785d1300c8f47ceb9de78fd94c47452/FLAGcc5febc80 [2021-11-03 04:55:50,099 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/data/72805838a/f785d1300c8f47ceb9de78fd94c47452 [2021-11-03 04:55:50,102 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:55:50,103 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:55:50,105 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:55:50,106 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:55:50,114 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:55:50,115 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:55:50" (1/1) ... [2021-11-03 04:55:50,116 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52b6c402 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:55:50, skipping insertion in model container [2021-11-03 04:55:50,116 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:55:50" (1/1) ... [2021-11-03 04:55:50,122 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:55:50,183 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:55:50,732 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_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/sv-benchmarks/c/product-lines/elevator_spec2_product24.cil.c[63703,63716] [2021-11-03 04:55:50,813 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:55:50,835 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 04:55:50,836 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@411362bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:55:50, skipping insertion in model container [2021-11-03 04:55:50,837 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:55:50,837 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 04:55:50,840 INFO L168 Benchmark]: Toolchain (without parser) took 734.80 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 55.7 MB in the beginning and 74.3 MB in the end (delta: -18.7 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-11-03 04:55:50,842 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 94.4 MB. Free memory was 66.4 MB in the beginning and 66.4 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:55:50,844 INFO L168 Benchmark]: CACSL2BoogieTranslator took 732.20 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 55.4 MB in the beginning and 74.3 MB in the end (delta: -19.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-03 04:55:50,846 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 94.4 MB. Free memory was 66.4 MB in the beginning and 66.4 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 732.20 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 55.4 MB in the beginning and 74.3 MB in the end (delta: -19.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 3206]: 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_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/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_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product24.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/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_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/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 e942074e046d4b6eec963a95d600daf33500a37aba1da700aae37a309fea4cda --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:55:53,054 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:55:53,058 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:55:53,117 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:55:53,118 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:55:53,123 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:55:53,125 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:55:53,130 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:55:53,134 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:55:53,144 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:55:53,146 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:55:53,147 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:55:53,148 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:55:53,151 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:55:53,153 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:55:53,157 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:55:53,159 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:55:53,160 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:55:53,162 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:55:53,170 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:55:53,172 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:55:53,174 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:55:53,177 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:55:53,179 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:55:53,184 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:55:53,184 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:55:53,185 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:55:53,187 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:55:53,188 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:55:53,189 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:55:53,190 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:55:53,191 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:55:53,193 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:55:53,194 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:55:53,195 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:55:53,196 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:55:53,197 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:55:53,197 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:55:53,197 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:55:53,199 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:55:53,200 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:55:53,205 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-03 04:55:53,259 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:55:53,259 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:55:53,260 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:55:53,260 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:55:53,261 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:55:53,261 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:55:53,261 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:55:53,261 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:55:53,262 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:55:53,263 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:55:53,264 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:55:53,264 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:55:53,264 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:55:53,265 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:55:53,265 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:55:53,265 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:55:53,265 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:55:53,266 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 04:55:53,266 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 04:55:53,266 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:55:53,266 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:55:53,266 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:55:53,267 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:55:53,267 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:55:53,267 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 04:55:53,267 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:55:53,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:55:53,268 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:55:53,268 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:55:53,268 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:55:53,269 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 04:55:53,269 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 04:55:53,269 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:55:53,269 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:55:53,270 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:55:53,270 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_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e942074e046d4b6eec963a95d600daf33500a37aba1da700aae37a309fea4cda [2021-11-03 04:55:53,659 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:55:53,691 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:55:53,694 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:55:53,695 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:55:53,696 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:55:53,699 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/product-lines/elevator_spec2_product24.cil.c [2021-11-03 04:55:53,773 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/data/f6a99bcd9/05e974de14e240679ad8ad904ed3f2b5/FLAGdafed6e62 [2021-11-03 04:55:54,434 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:55:54,437 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/sv-benchmarks/c/product-lines/elevator_spec2_product24.cil.c [2021-11-03 04:55:54,474 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/data/f6a99bcd9/05e974de14e240679ad8ad904ed3f2b5/FLAGdafed6e62 [2021-11-03 04:55:54,665 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/data/f6a99bcd9/05e974de14e240679ad8ad904ed3f2b5 [2021-11-03 04:55:54,669 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:55:54,672 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:55:54,674 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:55:54,674 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:55:54,678 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:55:54,679 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:55:54" (1/1) ... [2021-11-03 04:55:54,681 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@574eff77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:55:54, skipping insertion in model container [2021-11-03 04:55:54,681 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:55:54" (1/1) ... [2021-11-03 04:55:54,689 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:55:54,788 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:55:55,443 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_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/sv-benchmarks/c/product-lines/elevator_spec2_product24.cil.c[63703,63716] [2021-11-03 04:55:55,540 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:55:55,559 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 04:55:55,586 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:55:55,735 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_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/sv-benchmarks/c/product-lines/elevator_spec2_product24.cil.c[63703,63716] [2021-11-03 04:55:55,766 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:55:55,786 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:55:55,865 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_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/sv-benchmarks/c/product-lines/elevator_spec2_product24.cil.c[63703,63716] [2021-11-03 04:55:55,881 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:55:55,935 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:55:55,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:55:55 WrapperNode [2021-11-03 04:55:55,935 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:55:55,937 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:55:55,937 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:55:55,937 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:55:55,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:55:55" (1/1) ... [2021-11-03 04:55:55,996 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:55:55" (1/1) ... [2021-11-03 04:55:56,448 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:55:56,449 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:55:56,449 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:55:56,449 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:55:56,468 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:55:55" (1/1) ... [2021-11-03 04:55:56,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:55:55" (1/1) ... [2021-11-03 04:55:56,555 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:55:55" (1/1) ... [2021-11-03 04:55:56,555 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:55:55" (1/1) ... [2021-11-03 04:55:56,823 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:55:55" (1/1) ... [2021-11-03 04:55:57,034 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:55:55" (1/1) ... [2021-11-03 04:55:57,073 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:55:55" (1/1) ... [2021-11-03 04:55:57,184 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:55:57,185 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:55:57,185 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:55:57,185 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:55:57,186 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:55:55" (1/1) ... [2021-11-03 04:55:57,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:55:57,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:55:57,267 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:55:57,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:55:57,374 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:55:57,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 04:55:57,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:55:57,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:56:15,349 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:56:15,350 INFO L299 CfgBuilder]: Removed 1613 assume(true) statements. [2021-11-03 04:56:15,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:56:15 BoogieIcfgContainer [2021-11-03 04:56:15,359 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:56:15,361 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:56:15,362 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:56:15,365 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:56:15,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:55:54" (1/3) ... [2021-11-03 04:56:15,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28decf3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:56:15, skipping insertion in model container [2021-11-03 04:56:15,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:55:55" (2/3) ... [2021-11-03 04:56:15,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28decf3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:56:15, skipping insertion in model container [2021-11-03 04:56:15,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:56:15" (3/3) ... [2021-11-03 04:56:15,368 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product24.cil.c [2021-11-03 04:56:15,373 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:56:15,373 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-03 04:56:15,446 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:56:15,452 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 04:56:15,452 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-03 04:56:15,580 INFO L276 IsEmpty]: Start isEmpty. Operand has 6972 states, 6966 states have (on average 1.8910422049956934) internal successors, (13173), 6971 states have internal predecessors, (13173), 0 states have call successors, (0), 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 04:56:15,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-03 04:56:15,590 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:56:15,591 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] [2021-11-03 04:56:15,592 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 04:56:15,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:56:15,597 INFO L85 PathProgramCache]: Analyzing trace with hash 100278991, now seen corresponding path program 1 times [2021-11-03 04:56:15,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:56:15,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1074627599] [2021-11-03 04:56:15,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:56:15,614 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:56:15,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:56:15,622 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:56:15,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 04:56:16,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:56:16,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-03 04:56:16,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:56:16,154 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 04:56:16,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:56:16,210 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 04:56:16,211 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:56:16,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1074627599] [2021-11-03 04:56:16,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1074627599] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:56:16,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:56:16,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:56:16,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768354535] [2021-11-03 04:56:16,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 04:56:16,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:56:16,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 04:56:16,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 04:56:16,266 INFO L87 Difference]: Start difference. First operand has 6972 states, 6966 states have (on average 1.8910422049956934) internal successors, (13173), 6971 states have internal predecessors, (13173), 0 states have call successors, (0), 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 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 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 04:56:16,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:56:16,483 INFO L93 Difference]: Finished difference Result 6991 states and 13196 transitions. [2021-11-03 04:56:16,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 04:56:16,485 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 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 27 [2021-11-03 04:56:16,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:56:16,549 INFO L225 Difference]: With dead ends: 6991 [2021-11-03 04:56:16,549 INFO L226 Difference]: Without dead ends: 6968 [2021-11-03 04:56:16,558 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 52 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 04:56:16,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6968 states. [2021-11-03 04:56:16,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6968 to 6968. [2021-11-03 04:56:16,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6968 states, 6963 states have (on average 1.8901335631193452) internal successors, (13161), 6967 states have internal predecessors, (13161), 0 states have call successors, (0), 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 04:56:16,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6968 states to 6968 states and 13161 transitions. [2021-11-03 04:56:16,862 INFO L78 Accepts]: Start accepts. Automaton has 6968 states and 13161 transitions. Word has length 27 [2021-11-03 04:56:16,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:56:16,863 INFO L470 AbstractCegarLoop]: Abstraction has 6968 states and 13161 transitions. [2021-11-03 04:56:16,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 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 04:56:16,864 INFO L276 IsEmpty]: Start isEmpty. Operand 6968 states and 13161 transitions. [2021-11-03 04:56:16,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-03 04:56:16,867 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:56:16,867 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] [2021-11-03 04:56:16,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 04:56:17,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:56:17,091 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 04:56:17,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:56:17,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1157355953, now seen corresponding path program 1 times [2021-11-03 04:56:17,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:56:17,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1253843860] [2021-11-03 04:56:17,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:56:17,093 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:56:17,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:56:17,094 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:56:17,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 04:56:17,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:56:17,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:56:17,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:56:17,618 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 04:56:17,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:56:17,732 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 04:56:17,732 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:56:17,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1253843860] [2021-11-03 04:56:17,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1253843860] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:56:17,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:56:17,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:56:17,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310196367] [2021-11-03 04:56:17,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:56:17,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:56:17,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:56:17,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:56:17,743 INFO L87 Difference]: Start difference. First operand 6968 states and 13161 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 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 04:56:18,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:56:18,233 INFO L93 Difference]: Finished difference Result 13923 states and 26303 transitions. [2021-11-03 04:56:18,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:56:18,234 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 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 29 [2021-11-03 04:56:18,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:56:18,281 INFO L225 Difference]: With dead ends: 13923 [2021-11-03 04:56:18,282 INFO L226 Difference]: Without dead ends: 6968 [2021-11-03 04:56:18,301 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 54 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 04:56:18,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6968 states. [2021-11-03 04:56:18,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6968 to 6968. [2021-11-03 04:56:18,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6968 states, 6963 states have (on average 1.889271865575183) internal successors, (13155), 6967 states have internal predecessors, (13155), 0 states have call successors, (0), 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 04:56:18,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6968 states to 6968 states and 13155 transitions. [2021-11-03 04:56:18,596 INFO L78 Accepts]: Start accepts. Automaton has 6968 states and 13155 transitions. Word has length 29 [2021-11-03 04:56:18,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:56:18,596 INFO L470 AbstractCegarLoop]: Abstraction has 6968 states and 13155 transitions. [2021-11-03 04:56:18,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 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 04:56:18,597 INFO L276 IsEmpty]: Start isEmpty. Operand 6968 states and 13155 transitions. [2021-11-03 04:56:18,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-03 04:56:18,599 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:56:18,600 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:56:18,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 04:56:18,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:56:18,814 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 04:56:18,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:56:18,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1275802363, now seen corresponding path program 1 times [2021-11-03 04:56:18,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:56:18,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [258712761] [2021-11-03 04:56:18,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:56:18,817 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:56:18,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:56:18,820 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:56:18,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 04:56:19,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:56:19,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:56:19,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:56:19,302 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 04:56:19,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:56:19,431 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 04:56:19,431 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:56:19,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [258712761] [2021-11-03 04:56:19,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [258712761] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:56:19,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:56:19,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:56:19,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641390143] [2021-11-03 04:56:19,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:56:19,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:56:19,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:56:19,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:56:19,435 INFO L87 Difference]: Start difference. First operand 6968 states and 13155 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 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 04:56:20,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:56:20,047 INFO L93 Difference]: Finished difference Result 13887 states and 26226 transitions. [2021-11-03 04:56:20,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:56:20,048 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-03 04:56:20,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:56:20,095 INFO L225 Difference]: With dead ends: 13887 [2021-11-03 04:56:20,095 INFO L226 Difference]: Without dead ends: 6941 [2021-11-03 04:56:20,104 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 62 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 04:56:20,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6941 states. [2021-11-03 04:56:20,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6941 to 6941. [2021-11-03 04:56:20,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6941 states, 6936 states have (on average 1.8885524798154556) internal successors, (13099), 6940 states have internal predecessors, (13099), 0 states have call successors, (0), 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 04:56:20,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6941 states to 6941 states and 13099 transitions. [2021-11-03 04:56:20,385 INFO L78 Accepts]: Start accepts. Automaton has 6941 states and 13099 transitions. Word has length 34 [2021-11-03 04:56:20,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:56:20,385 INFO L470 AbstractCegarLoop]: Abstraction has 6941 states and 13099 transitions. [2021-11-03 04:56:20,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 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 04:56:20,387 INFO L276 IsEmpty]: Start isEmpty. Operand 6941 states and 13099 transitions. [2021-11-03 04:56:20,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-03 04:56:20,389 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:56:20,389 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] [2021-11-03 04:56:20,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 04:56:20,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:56:20,607 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 04:56:20,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:56:20,607 INFO L85 PathProgramCache]: Analyzing trace with hash -234979549, now seen corresponding path program 1 times [2021-11-03 04:56:20,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:56:20,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1868104395] [2021-11-03 04:56:20,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:56:20,609 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:56:20,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:56:20,610 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:56:20,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 04:56:20,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:56:20,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:56:20,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:56:21,038 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 04:56:21,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:56:21,139 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 04:56:21,140 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:56:21,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1868104395] [2021-11-03 04:56:21,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1868104395] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:56:21,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:56:21,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:56:21,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428754996] [2021-11-03 04:56:21,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:56:21,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:56:21,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:56:21,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:56:21,143 INFO L87 Difference]: Start difference. First operand 6941 states and 13099 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:56:21,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:56:21,585 INFO L93 Difference]: Finished difference Result 13860 states and 26170 transitions. [2021-11-03 04:56:21,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:56:21,586 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-03 04:56:21,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:56:21,627 INFO L225 Difference]: With dead ends: 13860 [2021-11-03 04:56:21,627 INFO L226 Difference]: Without dead ends: 6941 [2021-11-03 04:56:21,634 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 66 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 04:56:21,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6941 states. [2021-11-03 04:56:21,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6941 to 6941. [2021-11-03 04:56:21,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6941 states, 6936 states have (on average 1.8876874279123415) internal successors, (13093), 6940 states have internal predecessors, (13093), 0 states have call successors, (0), 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 04:56:21,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6941 states to 6941 states and 13093 transitions. [2021-11-03 04:56:21,890 INFO L78 Accepts]: Start accepts. Automaton has 6941 states and 13093 transitions. Word has length 35 [2021-11-03 04:56:21,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:56:21,891 INFO L470 AbstractCegarLoop]: Abstraction has 6941 states and 13093 transitions. [2021-11-03 04:56:21,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:56:21,891 INFO L276 IsEmpty]: Start isEmpty. Operand 6941 states and 13093 transitions. [2021-11-03 04:56:21,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-03 04:56:21,894 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:56:21,894 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] [2021-11-03 04:56:21,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 04:56:22,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:56:22,108 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 04:56:22,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:56:22,109 INFO L85 PathProgramCache]: Analyzing trace with hash -420164622, now seen corresponding path program 1 times [2021-11-03 04:56:22,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:56:22,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [435133392] [2021-11-03 04:56:22,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:56:22,111 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:56:22,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:56:22,112 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:56:22,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 04:56:22,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:56:22,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 04:56:22,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:56:22,644 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 04:56:22,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:56:22,800 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 04:56:22,801 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:56:22,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [435133392] [2021-11-03 04:56:22,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [435133392] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:56:22,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:56:22,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 04:56:22,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803421334] [2021-11-03 04:56:22,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:56:22,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:56:22,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:56:22,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:56:22,803 INFO L87 Difference]: Start difference. First operand 6941 states and 13093 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 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 04:56:23,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:56:23,306 INFO L93 Difference]: Finished difference Result 13854 states and 26153 transitions. [2021-11-03 04:56:23,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:56:23,307 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 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 40 [2021-11-03 04:56:23,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:56:23,328 INFO L225 Difference]: With dead ends: 13854 [2021-11-03 04:56:23,328 INFO L226 Difference]: Without dead ends: 6938 [2021-11-03 04:56:23,338 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 72 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 04:56:23,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6938 states. [2021-11-03 04:56:23,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6938 to 6938. [2021-11-03 04:56:23,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6938 states, 6933 states have (on average 1.8873503533823741) internal successors, (13085), 6937 states have internal predecessors, (13085), 0 states have call successors, (0), 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 04:56:23,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6938 states to 6938 states and 13085 transitions. [2021-11-03 04:56:23,585 INFO L78 Accepts]: Start accepts. Automaton has 6938 states and 13085 transitions. Word has length 40 [2021-11-03 04:56:23,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:56:23,586 INFO L470 AbstractCegarLoop]: Abstraction has 6938 states and 13085 transitions. [2021-11-03 04:56:23,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 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 04:56:23,586 INFO L276 IsEmpty]: Start isEmpty. Operand 6938 states and 13085 transitions. [2021-11-03 04:56:23,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-03 04:56:23,588 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:56:23,589 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:56:23,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 04:56:23,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:56:23,804 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 04:56:23,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:56:23,805 INFO L85 PathProgramCache]: Analyzing trace with hash -2034086878, now seen corresponding path program 1 times [2021-11-03 04:56:23,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:56:23,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [812405003] [2021-11-03 04:56:23,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:56:23,806 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:56:23,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:56:23,807 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:56:23,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 04:56:24,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:56:24,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:56:24,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:56:24,532 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 04:56:24,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:56:24,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:56:24,687 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:56:24,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [812405003] [2021-11-03 04:56:24,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [812405003] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:56:24,688 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:56:24,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 04:56:24,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459023325] [2021-11-03 04:56:24,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:56:24,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:56:24,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:56:24,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:56:24,690 INFO L87 Difference]: Start difference. First operand 6938 states and 13085 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:56:26,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:56:26,157 INFO L93 Difference]: Finished difference Result 18164 states and 34300 transitions. [2021-11-03 04:56:26,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:56:26,162 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-03 04:56:26,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:56:26,206 INFO L225 Difference]: With dead ends: 18164 [2021-11-03 04:56:26,207 INFO L226 Difference]: Without dead ends: 14653 [2021-11-03 04:56:26,216 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:56:26,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14653 states. [2021-11-03 04:56:26,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14653 to 9080. [2021-11-03 04:56:26,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9080 states, 9075 states have (on average 1.887823691460055) internal successors, (17132), 9079 states have internal predecessors, (17132), 0 states have call successors, (0), 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 04:56:26,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9080 states to 9080 states and 17132 transitions. [2021-11-03 04:56:26,643 INFO L78 Accepts]: Start accepts. Automaton has 9080 states and 17132 transitions. Word has length 41 [2021-11-03 04:56:26,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:56:26,643 INFO L470 AbstractCegarLoop]: Abstraction has 9080 states and 17132 transitions. [2021-11-03 04:56:26,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:56:26,644 INFO L276 IsEmpty]: Start isEmpty. Operand 9080 states and 17132 transitions. [2021-11-03 04:56:26,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 04:56:26,650 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:56:26,651 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:56:26,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 04:56:26,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:56:26,865 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 04:56:26,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:56:26,866 INFO L85 PathProgramCache]: Analyzing trace with hash 2082230644, now seen corresponding path program 1 times [2021-11-03 04:56:26,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:56:26,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1392207759] [2021-11-03 04:56:26,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:56:26,867 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:56:26,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:56:26,868 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:56:26,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 04:56:27,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:56:27,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:56:27,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:56:27,496 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 04:56:27,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:56:27,721 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 04:56:27,721 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:56:27,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1392207759] [2021-11-03 04:56:27,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1392207759] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:56:27,722 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:56:27,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-03 04:56:27,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629129233] [2021-11-03 04:56:27,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:56:27,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:56:27,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:56:27,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:56:27,724 INFO L87 Difference]: Start difference. First operand 9080 states and 17132 transitions. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 7 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 04:56:28,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:56:28,763 INFO L93 Difference]: Finished difference Result 17020 states and 31902 transitions. [2021-11-03 04:56:28,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-03 04:56:28,764 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 7 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 60 [2021-11-03 04:56:28,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:56:28,791 INFO L225 Difference]: With dead ends: 17020 [2021-11-03 04:56:28,791 INFO L226 Difference]: Without dead ends: 9149 [2021-11-03 04:56:28,804 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-03 04:56:28,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9149 states. [2021-11-03 04:56:29,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9149 to 6369. [2021-11-03 04:56:29,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6369 states, 6364 states have (on average 1.8812067881835324) internal successors, (11972), 6368 states have internal predecessors, (11972), 0 states have call successors, (0), 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 04:56:29,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6369 states to 6369 states and 11972 transitions. [2021-11-03 04:56:29,114 INFO L78 Accepts]: Start accepts. Automaton has 6369 states and 11972 transitions. Word has length 60 [2021-11-03 04:56:29,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:56:29,115 INFO L470 AbstractCegarLoop]: Abstraction has 6369 states and 11972 transitions. [2021-11-03 04:56:29,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 7 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 04:56:29,115 INFO L276 IsEmpty]: Start isEmpty. Operand 6369 states and 11972 transitions. [2021-11-03 04:56:29,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-03 04:56:29,118 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:56:29,118 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 04:56:29,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 04:56:29,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:56:29,334 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 04:56:29,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:56:29,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1389818566, now seen corresponding path program 1 times [2021-11-03 04:56:29,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:56:29,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1198708154] [2021-11-03 04:56:29,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:56:29,335 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:56:29,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:56:29,336 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:56:29,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 04:56:29,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:56:29,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:56:29,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:56:29,939 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 04:56:29,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:56:30,148 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 04:56:30,148 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:56:30,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1198708154] [2021-11-03 04:56:30,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1198708154] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:56:30,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:56:30,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 04:56:30,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574834762] [2021-11-03 04:56:30,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:56:30,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:56:30,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:56:30,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:56:30,154 INFO L87 Difference]: Start difference. First operand 6369 states and 11972 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 04:56:34,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:56:34,667 INFO L93 Difference]: Finished difference Result 22249 states and 41856 transitions. [2021-11-03 04:56:34,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:56:34,668 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 61 [2021-11-03 04:56:34,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:56:34,717 INFO L225 Difference]: With dead ends: 22249 [2021-11-03 04:56:34,718 INFO L226 Difference]: Without dead ends: 15914 [2021-11-03 04:56:34,730 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 116 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 04:56:34,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15914 states. [2021-11-03 04:56:35,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15914 to 6369. [2021-11-03 04:56:35,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6369 states, 6364 states have (on average 1.8243243243243243) internal successors, (11610), 6368 states have internal predecessors, (11610), 0 states have call successors, (0), 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 04:56:35,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6369 states to 6369 states and 11610 transitions. [2021-11-03 04:56:35,228 INFO L78 Accepts]: Start accepts. Automaton has 6369 states and 11610 transitions. Word has length 61 [2021-11-03 04:56:35,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:56:35,228 INFO L470 AbstractCegarLoop]: Abstraction has 6369 states and 11610 transitions. [2021-11-03 04:56:35,228 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 04:56:35,229 INFO L276 IsEmpty]: Start isEmpty. Operand 6369 states and 11610 transitions. [2021-11-03 04:56:35,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-03 04:56:35,232 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:56:35,232 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:56:35,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 04:56:35,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:56:35,451 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 04:56:35,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:56:35,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1768436262, now seen corresponding path program 1 times [2021-11-03 04:56:35,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:56:35,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [678294484] [2021-11-03 04:56:35,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:56:35,452 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:56:35,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:56:35,453 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:56:35,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 04:56:35,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:56:35,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:56:35,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:56:36,082 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 04:56:36,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:56:36,294 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 04:56:36,294 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:56:36,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [678294484] [2021-11-03 04:56:36,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [678294484] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:56:36,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:56:36,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 04:56:36,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203990888] [2021-11-03 04:56:36,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:56:36,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:56:36,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:56:36,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:56:36,296 INFO L87 Difference]: Start difference. First operand 6369 states and 11610 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 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 04:56:38,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:56:38,661 INFO L93 Difference]: Finished difference Result 17423 states and 32048 transitions. [2021-11-03 04:56:38,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 04:56:38,661 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 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 04:56:38,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:56:38,689 INFO L225 Difference]: With dead ends: 17423 [2021-11-03 04:56:38,689 INFO L226 Difference]: Without dead ends: 11115 [2021-11-03 04:56:38,700 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 132 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 04:56:38,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11115 states. [2021-11-03 04:56:39,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11115 to 6265. [2021-11-03 04:56:39,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6265 states, 6260 states have (on average 1.8252396166134186) internal successors, (11426), 6264 states have internal predecessors, (11426), 0 states have call successors, (0), 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 04:56:39,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6265 states to 6265 states and 11426 transitions. [2021-11-03 04:56:39,124 INFO L78 Accepts]: Start accepts. Automaton has 6265 states and 11426 transitions. Word has length 69 [2021-11-03 04:56:39,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:56:39,125 INFO L470 AbstractCegarLoop]: Abstraction has 6265 states and 11426 transitions. [2021-11-03 04:56:39,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 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 04:56:39,125 INFO L276 IsEmpty]: Start isEmpty. Operand 6265 states and 11426 transitions. [2021-11-03 04:56:39,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-03 04:56:39,128 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:56:39,128 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:56:39,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 04:56:39,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:56:39,343 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 04:56:39,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:56:39,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1752938839, now seen corresponding path program 1 times [2021-11-03 04:56:39,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:56:39,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [609293053] [2021-11-03 04:56:39,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:56:39,344 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:56:39,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:56:39,345 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:56:39,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 04:56:39,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:56:39,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:56:39,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:56:40,170 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 04:56:40,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:56:41,455 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 04:56:41,455 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:56:41,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [609293053] [2021-11-03 04:56:41,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [609293053] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:56:41,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:56:41,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 04:56:41,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921335888] [2021-11-03 04:56:41,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:56:41,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:56:41,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:56:41,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:56:41,457 INFO L87 Difference]: Start difference. First operand 6265 states and 11426 transitions. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:56:44,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:56:44,925 INFO L93 Difference]: Finished difference Result 19986 states and 36459 transitions. [2021-11-03 04:56:44,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:56:44,928 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-03 04:56:44,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:56:44,952 INFO L225 Difference]: With dead ends: 19986 [2021-11-03 04:56:44,953 INFO L226 Difference]: Without dead ends: 13774 [2021-11-03 04:56:44,961 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:56:44,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13774 states. [2021-11-03 04:56:45,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13774 to 8712. [2021-11-03 04:56:45,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8712 states, 8707 states have (on average 1.8117606523486849) internal successors, (15775), 8711 states have internal predecessors, (15775), 0 states have call successors, (0), 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 04:56:45,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8712 states to 8712 states and 15775 transitions. [2021-11-03 04:56:45,484 INFO L78 Accepts]: Start accepts. Automaton has 8712 states and 15775 transitions. Word has length 72 [2021-11-03 04:56:45,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:56:45,484 INFO L470 AbstractCegarLoop]: Abstraction has 8712 states and 15775 transitions. [2021-11-03 04:56:45,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:56:45,485 INFO L276 IsEmpty]: Start isEmpty. Operand 8712 states and 15775 transitions. [2021-11-03 04:56:45,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-03 04:56:45,488 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:56:45,489 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 04:56:45,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 04:56:45,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:56:45,704 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 04:56:45,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:56:45,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1417519602, now seen corresponding path program 1 times [2021-11-03 04:56:45,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:56:45,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2098208535] [2021-11-03 04:56:45,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:56:45,705 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:56:45,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:56:45,706 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:56:45,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 04:56:46,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:56:46,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:56:46,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:56:46,394 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 04:56:46,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:56:46,572 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 04:56:46,572 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:56:46,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2098208535] [2021-11-03 04:56:46,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2098208535] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:56:46,572 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:56:46,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:56:46,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777722590] [2021-11-03 04:56:46,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:56:46,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:56:46,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:56:46,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:56:46,574 INFO L87 Difference]: Start difference. First operand 8712 states and 15775 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 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 04:56:51,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:56:51,928 INFO L93 Difference]: Finished difference Result 34572 states and 63023 transitions. [2021-11-03 04:56:51,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:56:51,928 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 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 04:56:51,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:56:51,961 INFO L225 Difference]: With dead ends: 34572 [2021-11-03 04:56:51,961 INFO L226 Difference]: Without dead ends: 25912 [2021-11-03 04:56:51,973 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 141 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 04:56:52,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25912 states. [2021-11-03 04:56:52,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25912 to 8726. [2021-11-03 04:56:52,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8726 states, 8721 states have (on average 1.8104575163398693) internal successors, (15789), 8725 states have internal predecessors, (15789), 0 states have call successors, (0), 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 04:56:52,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8726 states to 8726 states and 15789 transitions. [2021-11-03 04:56:52,554 INFO L78 Accepts]: Start accepts. Automaton has 8726 states and 15789 transitions. Word has length 73 [2021-11-03 04:56:52,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:56:52,555 INFO L470 AbstractCegarLoop]: Abstraction has 8726 states and 15789 transitions. [2021-11-03 04:56:52,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 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 04:56:52,555 INFO L276 IsEmpty]: Start isEmpty. Operand 8726 states and 15789 transitions. [2021-11-03 04:56:52,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-03 04:56:52,558 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:56:52,558 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 04:56:52,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 04:56:52,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:56:52,776 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 04:56:52,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:56:52,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1038663033, now seen corresponding path program 1 times [2021-11-03 04:56:52,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:56:52,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1417596715] [2021-11-03 04:56:52,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:56:52,777 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:56:52,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:56:52,778 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:56:52,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 04:56:53,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:56:53,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:56:53,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:56:53,511 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 04:56:53,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:56:53,677 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 04:56:53,677 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:56:53,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1417596715] [2021-11-03 04:56:53,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1417596715] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:56:53,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:56:53,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 04:56:53,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946027268] [2021-11-03 04:56:53,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:56:53,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:56:53,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:56:53,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:56:53,679 INFO L87 Difference]: Start difference. First operand 8726 states and 15789 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 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 04:57:01,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:57:01,742 INFO L93 Difference]: Finished difference Result 27004 states and 49224 transitions. [2021-11-03 04:57:01,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:57:01,742 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 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 74 [2021-11-03 04:57:01,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:57:01,763 INFO L225 Difference]: With dead ends: 27004 [2021-11-03 04:57:01,763 INFO L226 Difference]: Without dead ends: 19892 [2021-11-03 04:57:01,773 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:57:01,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19892 states. [2021-11-03 04:57:02,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19892 to 15108. [2021-11-03 04:57:02,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15108 states, 15103 states have (on average 1.8120241011719527) internal successors, (27367), 15107 states have internal predecessors, (27367), 0 states have call successors, (0), 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 04:57:02,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15108 states to 15108 states and 27367 transitions. [2021-11-03 04:57:02,580 INFO L78 Accepts]: Start accepts. Automaton has 15108 states and 27367 transitions. Word has length 74 [2021-11-03 04:57:02,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:57:02,580 INFO L470 AbstractCegarLoop]: Abstraction has 15108 states and 27367 transitions. [2021-11-03 04:57:02,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 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 04:57:02,581 INFO L276 IsEmpty]: Start isEmpty. Operand 15108 states and 27367 transitions. [2021-11-03 04:57:02,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-03 04:57:02,584 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:57:02,584 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 04:57:02,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 04:57:02,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:57:02,798 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 04:57:02,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:57:02,798 INFO L85 PathProgramCache]: Analyzing trace with hash -2049780283, now seen corresponding path program 1 times [2021-11-03 04:57:02,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:57:02,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1807427296] [2021-11-03 04:57:02,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:57:02,799 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:57:02,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:57:02,800 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:57:02,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 04:57:03,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:57:03,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:57:03,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:57:03,566 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 04:57:03,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:57:03,766 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 04:57:03,767 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:57:03,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1807427296] [2021-11-03 04:57:03,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1807427296] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:57:03,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:57:03,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:57:03,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917189519] [2021-11-03 04:57:03,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:57:03,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:57:03,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:57:03,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:57:03,768 INFO L87 Difference]: Start difference. First operand 15108 states and 27367 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:57:08,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:57:08,163 INFO L93 Difference]: Finished difference Result 34088 states and 61987 transitions. [2021-11-03 04:57:08,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:57:08,164 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-03 04:57:08,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:57:08,185 INFO L225 Difference]: With dead ends: 34088 [2021-11-03 04:57:08,186 INFO L226 Difference]: Without dead ends: 20579 [2021-11-03 04:57:08,193 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:57:08,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20579 states. [2021-11-03 04:57:09,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20579 to 15625. [2021-11-03 04:57:09,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15625 states, 15620 states have (on average 1.7846350832266324) internal successors, (27876), 15624 states have internal predecessors, (27876), 0 states have call successors, (0), 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 04:57:09,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15625 states to 15625 states and 27876 transitions. [2021-11-03 04:57:09,039 INFO L78 Accepts]: Start accepts. Automaton has 15625 states and 27876 transitions. Word has length 74 [2021-11-03 04:57:09,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:57:09,040 INFO L470 AbstractCegarLoop]: Abstraction has 15625 states and 27876 transitions. [2021-11-03 04:57:09,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:57:09,040 INFO L276 IsEmpty]: Start isEmpty. Operand 15625 states and 27876 transitions. [2021-11-03 04:57:09,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-03 04:57:09,042 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:57:09,043 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 04:57:09,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 04:57:09,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:57:09,269 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 04:57:09,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:57:09,269 INFO L85 PathProgramCache]: Analyzing trace with hash 908094399, now seen corresponding path program 1 times [2021-11-03 04:57:09,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:57:09,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1282839955] [2021-11-03 04:57:09,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:57:09,270 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:57:09,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:57:09,270 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:57:09,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 04:57:09,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:57:09,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:57:09,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:57:10,079 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 04:57:10,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:57:10,259 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 04:57:10,259 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:57:10,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1282839955] [2021-11-03 04:57:10,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1282839955] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:57:10,259 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:57:10,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:57:10,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342765413] [2021-11-03 04:57:10,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:57:10,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:57:10,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:57:10,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:57:10,261 INFO L87 Difference]: Start difference. First operand 15625 states and 27876 transitions. Second operand has 5 states, 5 states have (on average 15.2) 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 04:57:14,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:57:14,985 INFO L93 Difference]: Finished difference Result 110676 states and 198947 transitions. [2021-11-03 04:57:14,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 04:57:14,986 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) 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 76 [2021-11-03 04:57:14,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:57:15,114 INFO L225 Difference]: With dead ends: 110676 [2021-11-03 04:57:15,114 INFO L226 Difference]: Without dead ends: 95099 [2021-11-03 04:57:15,134 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 147 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 04:57:15,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95099 states. [2021-11-03 04:57:17,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95099 to 25177. [2021-11-03 04:57:17,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25177 states, 25172 states have (on average 1.7934609883998094) internal successors, (45145), 25176 states have internal predecessors, (45145), 0 states have call successors, (0), 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 04:57:17,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25177 states to 25177 states and 45145 transitions. [2021-11-03 04:57:17,187 INFO L78 Accepts]: Start accepts. Automaton has 25177 states and 45145 transitions. Word has length 76 [2021-11-03 04:57:17,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:57:17,187 INFO L470 AbstractCegarLoop]: Abstraction has 25177 states and 45145 transitions. [2021-11-03 04:57:17,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) 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 04:57:17,187 INFO L276 IsEmpty]: Start isEmpty. Operand 25177 states and 45145 transitions. [2021-11-03 04:57:17,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-03 04:57:17,190 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:57:17,190 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 04:57:17,206 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-03 04:57:17,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:57:17,406 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 04:57:17,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:57:17,407 INFO L85 PathProgramCache]: Analyzing trace with hash 835707841, now seen corresponding path program 1 times [2021-11-03 04:57:17,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:57:17,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1681902311] [2021-11-03 04:57:17,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:57:17,407 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:57:17,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:57:17,408 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:57:17,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 04:57:18,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:57:18,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:57:18,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:57:18,266 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 04:57:18,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:57:18,501 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 04:57:18,501 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:57:18,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1681902311] [2021-11-03 04:57:18,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1681902311] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:57:18,501 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:57:18,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 04:57:18,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645067461] [2021-11-03 04:57:18,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:57:18,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:57:18,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:57:18,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:57:18,503 INFO L87 Difference]: Start difference. First operand 25177 states and 45145 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 5 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 04:57:22,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:57:22,448 INFO L93 Difference]: Finished difference Result 61717 states and 111578 transitions. [2021-11-03 04:57:22,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-03 04:57:22,449 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 5 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 76 [2021-11-03 04:57:22,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:57:22,507 INFO L225 Difference]: With dead ends: 61717 [2021-11-03 04:57:22,508 INFO L226 Difference]: Without dead ends: 42012 [2021-11-03 04:57:22,530 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 146 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 04:57:22,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42012 states. [2021-11-03 04:57:23,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42012 to 25142. [2021-11-03 04:57:23,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25142 states, 25137 states have (on average 1.7931734097147631) internal successors, (45075), 25141 states have internal predecessors, (45075), 0 states have call successors, (0), 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 04:57:23,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25142 states to 25142 states and 45075 transitions. [2021-11-03 04:57:23,960 INFO L78 Accepts]: Start accepts. Automaton has 25142 states and 45075 transitions. Word has length 76 [2021-11-03 04:57:23,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:57:23,961 INFO L470 AbstractCegarLoop]: Abstraction has 25142 states and 45075 transitions. [2021-11-03 04:57:23,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 5 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 04:57:23,961 INFO L276 IsEmpty]: Start isEmpty. Operand 25142 states and 45075 transitions. [2021-11-03 04:57:23,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-03 04:57:23,964 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:57:23,964 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] [2021-11-03 04:57:23,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 04:57:24,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:57:24,170 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 04:57:24,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:57:24,171 INFO L85 PathProgramCache]: Analyzing trace with hash 696484899, now seen corresponding path program 1 times [2021-11-03 04:57:24,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:57:24,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [763843023] [2021-11-03 04:57:24,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:57:24,171 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:57:24,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:57:24,173 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:57:24,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 04:57:24,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:57:24,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:57:24,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:57:25,042 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 04:57:25,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:57:25,244 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 04:57:25,244 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:57:25,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [763843023] [2021-11-03 04:57:25,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [763843023] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:57:25,244 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:57:25,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:57:25,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473483780] [2021-11-03 04:57:25,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:57:25,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:57:25,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:57:25,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:57:25,246 INFO L87 Difference]: Start difference. First operand 25142 states and 45075 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 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 04:57:27,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:57:27,901 INFO L93 Difference]: Finished difference Result 67426 states and 121158 transitions. [2021-11-03 04:57:27,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:57:27,901 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 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 83 [2021-11-03 04:57:27,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:57:27,953 INFO L225 Difference]: With dead ends: 67426 [2021-11-03 04:57:27,953 INFO L226 Difference]: Without dead ends: 44133 [2021-11-03 04:57:27,965 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 163 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 04:57:27,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44133 states. [2021-11-03 04:57:30,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44133 to 44118. [2021-11-03 04:57:30,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44118 states, 44113 states have (on average 1.7990161630358397) internal successors, (79360), 44117 states have internal predecessors, (79360), 0 states have call successors, (0), 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 04:57:30,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44118 states to 44118 states and 79360 transitions. [2021-11-03 04:57:30,539 INFO L78 Accepts]: Start accepts. Automaton has 44118 states and 79360 transitions. Word has length 83 [2021-11-03 04:57:30,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:57:30,540 INFO L470 AbstractCegarLoop]: Abstraction has 44118 states and 79360 transitions. [2021-11-03 04:57:30,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 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 04:57:30,540 INFO L276 IsEmpty]: Start isEmpty. Operand 44118 states and 79360 transitions. [2021-11-03 04:57:30,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-03 04:57:30,544 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:57:30,544 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:57:30,561 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-03 04:57:30,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:57:30,758 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 04:57:30,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:57:30,758 INFO L85 PathProgramCache]: Analyzing trace with hash -518849714, now seen corresponding path program 1 times [2021-11-03 04:57:30,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:57:30,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1607789782] [2021-11-03 04:57:30,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:57:30,759 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:57:30,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:57:30,760 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:57:30,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0dd701-8d6e-4505-a3f1-deed6bbcf767/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 04:57:31,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:57:31,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:57:31,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:57:31,724 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 04:57:31,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:57:31,962 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 04:57:31,963 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:57:31,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1607789782] [2021-11-03 04:57:31,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1607789782] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:57:31,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:57:31,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:57:31,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125857593] [2021-11-03 04:57:31,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:57:31,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:57:31,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:57:31,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:57:31,966 INFO L87 Difference]: Start difference. First operand 44118 states and 79360 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:57:36,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:57:36,397 INFO L93 Difference]: Finished difference Result 123078 states and 221641 transitions. [2021-11-03 04:57:36,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:57:36,398 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-03 04:57:36,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:57:36,513 INFO L225 Difference]: With dead ends: 123078 [2021-11-03 04:57:36,513 INFO L226 Difference]: Without dead ends: 81926 [2021-11-03 04:57:36,541 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 165 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 04:57:36,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81926 states.