./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c7caf1796ba4b07248be26f00733894517b89591cbeb4bf07d682989c7001a35 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:58:34,711 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:58:34,715 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:58:34,825 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:58:34,831 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:58:34,832 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:58:34,834 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:58:34,847 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:58:34,849 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:58:34,851 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:58:34,852 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:58:34,853 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:58:34,854 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:58:34,857 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:58:34,860 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:58:34,864 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:58:34,866 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:58:34,874 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:58:34,882 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:58:34,887 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:58:34,889 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:58:34,891 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:58:34,892 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:58:34,894 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:58:34,898 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:58:34,898 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:58:34,899 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:58:34,900 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:58:34,901 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:58:34,902 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:58:34,903 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:58:34,904 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:58:34,905 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:58:34,906 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:58:34,907 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:58:34,908 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:58:34,908 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:58:34,909 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:58:34,909 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:58:34,910 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:58:34,911 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:58:34,912 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:58:34,941 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:58:34,941 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:58:34,942 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:58:34,942 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:58:34,943 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:58:34,943 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:58:34,943 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:58:34,943 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:58:34,944 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:58:34,944 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:58:34,944 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:58:34,944 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:58:34,945 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:58:34,945 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:58:34,945 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:58:34,946 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:58:34,946 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:58:34,947 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:58:34,947 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:58:34,947 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:58:34,949 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:58:34,950 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:58:34,950 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:58:34,951 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:58:34,951 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:58:34,951 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:58:34,951 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:58:34,952 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:58:34,952 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:58:34,954 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:58:34,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:58:34,955 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:58:34,955 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:58:34,956 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:58:34,956 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:58:34,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:58:34,957 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:58:34,957 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:58:34,958 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:58:34,958 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_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7caf1796ba4b07248be26f00733894517b89591cbeb4bf07d682989c7001a35 [2021-11-07 01:58:35,253 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:58:35,280 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:58:35,283 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:58:35,284 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:58:35,285 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:58:35,286 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c [2021-11-07 01:58:35,357 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/data/e8c685643/4409afa93f304f6f87f73e9767775067/FLAG3292d8916 [2021-11-07 01:58:36,138 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:58:36,142 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c [2021-11-07 01:58:36,183 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/data/e8c685643/4409afa93f304f6f87f73e9767775067/FLAG3292d8916 [2021-11-07 01:58:36,240 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/data/e8c685643/4409afa93f304f6f87f73e9767775067 [2021-11-07 01:58:36,243 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:58:36,246 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:58:36,250 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:58:36,250 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:58:36,254 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:58:36,255 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:58:36" (1/1) ... [2021-11-07 01:58:36,258 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49f1a3fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:36, skipping insertion in model container [2021-11-07 01:58:36,259 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:58:36" (1/1) ... [2021-11-07 01:58:36,268 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:58:36,374 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:58:36,722 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_ef67a29c-74c7-4a04-aeca-23578acd89e2/sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c[4117,4130] [2021-11-07 01:58:37,152 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:58:37,164 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:58:37,165 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@59827ffc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:37, skipping insertion in model container [2021-11-07 01:58:37,165 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:58:37,166 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:58:37,168 INFO L168 Benchmark]: Toolchain (without parser) took 921.48 ms. Allocated memory is still 113.2 MB. Free memory was 78.9 MB in the beginning and 76.7 MB in the end (delta: 2.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-11-07 01:58:37,169 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 79.7 MB. Free memory is still 44.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:58:37,170 INFO L168 Benchmark]: CACSL2BoogieTranslator took 916.18 ms. Allocated memory is still 113.2 MB. Free memory was 78.6 MB in the beginning and 76.7 MB in the end (delta: 1.9 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-11-07 01:58:37,172 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 79.7 MB. Free memory is still 44.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 916.18 ms. Allocated memory is still 113.2 MB. Free memory was 78.6 MB in the beginning and 76.7 MB in the end (delta: 1.9 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 3079]: 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_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c7caf1796ba4b07248be26f00733894517b89591cbeb4bf07d682989c7001a35 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:58:39,653 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:58:39,657 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:58:39,703 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:58:39,703 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:58:39,705 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:58:39,707 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:58:39,710 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:58:39,713 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:58:39,715 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:58:39,716 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:58:39,718 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:58:39,719 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:58:39,720 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:58:39,722 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:58:39,724 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:58:39,725 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:58:39,727 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:58:39,740 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:58:39,743 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:58:39,745 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:58:39,747 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:58:39,748 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:58:39,749 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:58:39,753 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:58:39,754 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:58:39,754 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:58:39,755 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:58:39,756 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:58:39,757 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:58:39,758 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:58:39,759 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:58:39,760 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:58:39,761 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:58:39,762 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:58:39,763 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:58:39,763 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:58:39,764 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:58:39,764 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:58:39,766 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:58:39,767 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:58:39,768 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:58:39,796 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:58:39,797 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:58:39,797 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:58:39,798 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:58:39,798 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:58:39,798 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:58:39,799 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:58:39,799 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:58:39,799 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:58:39,800 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:58:39,801 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:58:39,801 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:58:39,801 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:58:39,801 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:58:39,802 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:58:39,802 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:58:39,802 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:58:39,802 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:58:39,802 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:58:39,803 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:58:39,803 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:58:39,803 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:58:39,803 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:58:39,804 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:58:39,804 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:58:39,804 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:58:39,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:58:39,805 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:58:39,805 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:58:39,805 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:58:39,805 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:58:39,806 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:58:39,806 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:58:39,806 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:58:39,806 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:58:39,806 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_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7caf1796ba4b07248be26f00733894517b89591cbeb4bf07d682989c7001a35 [2021-11-07 01:58:40,281 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:58:40,321 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:58:40,326 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:58:40,328 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:58:40,330 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:58:40,333 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c [2021-11-07 01:58:40,444 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/data/fa42be06b/852d7f3aa3e04d8e8909f86c5fbf045f/FLAG7877d6c48 [2021-11-07 01:58:41,304 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:58:41,305 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c [2021-11-07 01:58:41,332 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/data/fa42be06b/852d7f3aa3e04d8e8909f86c5fbf045f/FLAG7877d6c48 [2021-11-07 01:58:41,451 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/data/fa42be06b/852d7f3aa3e04d8e8909f86c5fbf045f [2021-11-07 01:58:41,455 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:58:41,458 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:58:41,462 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:58:41,462 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:58:41,466 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:58:41,468 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:58:41" (1/1) ... [2021-11-07 01:58:41,470 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f2469f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:41, skipping insertion in model container [2021-11-07 01:58:41,470 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:58:41" (1/1) ... [2021-11-07 01:58:41,480 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:58:41,620 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:58:41,930 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_ef67a29c-74c7-4a04-aeca-23578acd89e2/sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c[4117,4130] [2021-11-07 01:58:42,481 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:58:42,504 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:58:42,540 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:58:42,560 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_ef67a29c-74c7-4a04-aeca-23578acd89e2/sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c[4117,4130] [2021-11-07 01:58:42,743 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:58:42,761 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:58:42,782 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_ef67a29c-74c7-4a04-aeca-23578acd89e2/sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c[4117,4130] [2021-11-07 01:58:42,908 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:58:42,952 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:58:42,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:42 WrapperNode [2021-11-07 01:58:42,953 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:58:42,955 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:58:42,955 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:58:42,955 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:58:42,964 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:42" (1/1) ... [2021-11-07 01:58:43,057 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:42" (1/1) ... [2021-11-07 01:58:43,355 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:58:43,356 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:58:43,357 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:58:43,357 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:58:43,367 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:42" (1/1) ... [2021-11-07 01:58:43,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:42" (1/1) ... [2021-11-07 01:58:43,397 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:42" (1/1) ... [2021-11-07 01:58:43,397 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:42" (1/1) ... [2021-11-07 01:58:43,584 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:42" (1/1) ... [2021-11-07 01:58:43,775 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:42" (1/1) ... [2021-11-07 01:58:43,801 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:42" (1/1) ... [2021-11-07 01:58:43,856 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:58:43,859 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:58:43,860 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:58:43,860 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:58:43,861 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:42" (1/1) ... [2021-11-07 01:58:43,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:58:43,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:58:43,906 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:58:43,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:58:43,960 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:58:43,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:58:43,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:58:43,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:58:56,037 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:58:56,037 INFO L299 CfgBuilder]: Removed 809 assume(true) statements. [2021-11-07 01:58:56,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:58:56 BoogieIcfgContainer [2021-11-07 01:58:56,044 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:58:56,047 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:58:56,047 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:58:56,051 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:58:56,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:58:41" (1/3) ... [2021-11-07 01:58:56,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@90f945c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:58:56, skipping insertion in model container [2021-11-07 01:58:56,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:42" (2/3) ... [2021-11-07 01:58:56,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@90f945c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:58:56, skipping insertion in model container [2021-11-07 01:58:56,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:58:56" (3/3) ... [2021-11-07 01:58:56,055 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product29.cil.c [2021-11-07 01:58:56,062 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:58:56,062 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 01:58:56,139 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:58:56,146 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:58:56,147 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 01:58:56,241 INFO L276 IsEmpty]: Start isEmpty. Operand has 3565 states, 3559 states have (on average 1.89098061253161) internal successors, (6730), 3564 states have internal predecessors, (6730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:56,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 01:58:56,268 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:56,269 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:58:56,270 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:58:56,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:56,276 INFO L85 PathProgramCache]: Analyzing trace with hash -347031252, now seen corresponding path program 1 times [2021-11-07 01:58:56,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:56,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [92187361] [2021-11-07 01:58:56,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:56,293 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:56,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:56,294 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:56,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:58:56,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:56,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:58:56,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:57,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:58:57,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:57,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:58:57,316 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:57,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [92187361] [2021-11-07 01:58:57,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [92187361] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:57,318 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:58:57,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:58:57,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713610140] [2021-11-07 01:58:57,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:58:57,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:57,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:58:57,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:58:57,359 INFO L87 Difference]: Start difference. First operand has 3565 states, 3559 states have (on average 1.89098061253161) internal successors, (6730), 3564 states have internal predecessors, (6730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 26.0) internal successors, (52), 2 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) [2021-11-07 01:58:57,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:57,520 INFO L93 Difference]: Finished difference Result 3584 states and 6753 transitions. [2021-11-07 01:58:57,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:58:57,522 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 26.0) internal successors, (52), 2 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 52 [2021-11-07 01:58:57,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:57,580 INFO L225 Difference]: With dead ends: 3584 [2021-11-07 01:58:57,581 INFO L226 Difference]: Without dead ends: 3561 [2021-11-07 01:58:57,587 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:58:57,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3561 states. [2021-11-07 01:58:57,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3561 to 3561. [2021-11-07 01:58:57,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3561 states, 3556 states have (on average 1.8892013498312712) internal successors, (6718), 3560 states have internal predecessors, (6718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:57,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3561 states to 3561 states and 6718 transitions. [2021-11-07 01:58:57,809 INFO L78 Accepts]: Start accepts. Automaton has 3561 states and 6718 transitions. Word has length 52 [2021-11-07 01:58:57,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:58:57,811 INFO L470 AbstractCegarLoop]: Abstraction has 3561 states and 6718 transitions. [2021-11-07 01:58:57,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 26.0) internal successors, (52), 2 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) [2021-11-07 01:58:57,812 INFO L276 IsEmpty]: Start isEmpty. Operand 3561 states and 6718 transitions. [2021-11-07 01:58:57,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 01:58:57,818 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:57,818 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:58:57,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:58,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:58:58,032 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:58:58,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:58,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1255886491, now seen corresponding path program 1 times [2021-11-07 01:58:58,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:58,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1545784964] [2021-11-07 01:58:58,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:58,036 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:58,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:58,038 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:58,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:58:58,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:58,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:58:58,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:58,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:58:58,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:58,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:58:58,879 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:58,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1545784964] [2021-11-07 01:58:58,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1545784964] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:58,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:58:58,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:58:58,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249614001] [2021-11-07 01:58:58,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:58:58,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:58,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:58:58,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:58:58,884 INFO L87 Difference]: Start difference. First operand 3561 states and 6718 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:59,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:59,341 INFO L93 Difference]: Finished difference Result 10603 states and 20011 transitions. [2021-11-07 01:58:59,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:58:59,342 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-07 01:58:59,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:59,402 INFO L225 Difference]: With dead ends: 10603 [2021-11-07 01:58:59,402 INFO L226 Difference]: Without dead ends: 7055 [2021-11-07 01:58:59,542 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:58:59,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7055 states. [2021-11-07 01:58:59,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7055 to 3561. [2021-11-07 01:58:59,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3561 states, 3556 states have (on average 1.8872328458942633) internal successors, (6711), 3560 states have internal predecessors, (6711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:59,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3561 states to 3561 states and 6711 transitions. [2021-11-07 01:58:59,734 INFO L78 Accepts]: Start accepts. Automaton has 3561 states and 6711 transitions. Word has length 54 [2021-11-07 01:58:59,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:58:59,734 INFO L470 AbstractCegarLoop]: Abstraction has 3561 states and 6711 transitions. [2021-11-07 01:58:59,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:59,734 INFO L276 IsEmpty]: Start isEmpty. Operand 3561 states and 6711 transitions. [2021-11-07 01:58:59,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:58:59,740 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:59,740 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:58:59,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-07 01:58:59,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:58:59,957 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:58:59,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:59,958 INFO L85 PathProgramCache]: Analyzing trace with hash -322695074, now seen corresponding path program 1 times [2021-11-07 01:58:59,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:59,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [320352560] [2021-11-07 01:58:59,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:59,960 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:59,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:59,961 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:59:00,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:59:00,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:00,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:59:00,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:00,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:00,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:00,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:00,831 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:59:00,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [320352560] [2021-11-07 01:59:00,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [320352560] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:00,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:59:00,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:59:00,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438412589] [2021-11-07 01:59:00,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:59:00,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:59:00,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:59:00,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:59:00,836 INFO L87 Difference]: Start difference. First operand 3561 states and 6711 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:02,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:02,313 INFO L93 Difference]: Finished difference Result 24402 states and 46029 transitions. [2021-11-07 01:59:02,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:59:02,314 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 01:59:02,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:02,466 INFO L225 Difference]: With dead ends: 24402 [2021-11-07 01:59:02,466 INFO L226 Difference]: Without dead ends: 20863 [2021-11-07 01:59:02,479 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:59:02,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20863 states. [2021-11-07 01:59:02,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20863 to 3539. [2021-11-07 01:59:02,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3539 states, 3534 states have (on average 1.8845500848896435) internal successors, (6660), 3538 states have internal predecessors, (6660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:02,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3539 states to 3539 states and 6660 transitions. [2021-11-07 01:59:02,918 INFO L78 Accepts]: Start accepts. Automaton has 3539 states and 6660 transitions. Word has length 60 [2021-11-07 01:59:02,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:02,919 INFO L470 AbstractCegarLoop]: Abstraction has 3539 states and 6660 transitions. [2021-11-07 01:59:02,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:02,919 INFO L276 IsEmpty]: Start isEmpty. Operand 3539 states and 6660 transitions. [2021-11-07 01:59:02,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 01:59:02,925 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:02,925 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:59:02,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:03,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:59:03,143 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:59:03,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:03,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1416716573, now seen corresponding path program 1 times [2021-11-07 01:59:03,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:59:03,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2035285307] [2021-11-07 01:59:03,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:03,146 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:59:03,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:59:03,147 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:59:03,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:59:03,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:03,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:59:03,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:03,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:03,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:03,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:03,961 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:59:03,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2035285307] [2021-11-07 01:59:03,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2035285307] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:03,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:59:03,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:59:03,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094518220] [2021-11-07 01:59:03,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:59:03,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:59:03,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:59:03,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:59:03,966 INFO L87 Difference]: Start difference. First operand 3539 states and 6660 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:04,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:04,631 INFO L93 Difference]: Finished difference Result 10514 states and 19815 transitions. [2021-11-07 01:59:04,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:59:04,632 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 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 62 [2021-11-07 01:59:04,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:04,654 INFO L225 Difference]: With dead ends: 10514 [2021-11-07 01:59:04,654 INFO L226 Difference]: Without dead ends: 6997 [2021-11-07 01:59:04,662 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:59:04,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6997 states. [2021-11-07 01:59:04,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6997 to 3539. [2021-11-07 01:59:04,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3539 states, 3534 states have (on average 1.8814374646293153) internal successors, (6649), 3538 states have internal predecessors, (6649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:04,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3539 states to 3539 states and 6649 transitions. [2021-11-07 01:59:04,919 INFO L78 Accepts]: Start accepts. Automaton has 3539 states and 6649 transitions. Word has length 62 [2021-11-07 01:59:04,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:04,924 INFO L470 AbstractCegarLoop]: Abstraction has 3539 states and 6649 transitions. [2021-11-07 01:59:04,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:04,924 INFO L276 IsEmpty]: Start isEmpty. Operand 3539 states and 6649 transitions. [2021-11-07 01:59:04,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:59:04,929 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:04,929 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:59:04,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:05,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:59:05,146 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:59:05,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:05,146 INFO L85 PathProgramCache]: Analyzing trace with hash 237083176, now seen corresponding path program 1 times [2021-11-07 01:59:05,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:59:05,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1665362054] [2021-11-07 01:59:05,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:05,148 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:59:05,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:59:05,150 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:59:05,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:59:05,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:05,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 01:59:05,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:05,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:05,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:06,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:06,131 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:59:06,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1665362054] [2021-11-07 01:59:06,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1665362054] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:06,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:59:06,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:59:06,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026871132] [2021-11-07 01:59:06,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:59:06,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:59:06,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:59:06,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:59:06,133 INFO L87 Difference]: Start difference. First operand 3539 states and 6649 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:09,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:09,546 INFO L93 Difference]: Finished difference Result 38173 states and 71973 transitions. [2021-11-07 01:59:09,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:59:09,546 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 01:59:09,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:09,654 INFO L225 Difference]: With dead ends: 38173 [2021-11-07 01:59:09,654 INFO L226 Difference]: Without dead ends: 34659 [2021-11-07 01:59:09,671 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:59:09,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34659 states. [2021-11-07 01:59:10,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34659 to 3541. [2021-11-07 01:59:10,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3541 states, 3536 states have (on average 1.879524886877828) internal successors, (6646), 3540 states have internal predecessors, (6646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:10,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3541 states to 3541 states and 6646 transitions. [2021-11-07 01:59:10,221 INFO L78 Accepts]: Start accepts. Automaton has 3541 states and 6646 transitions. Word has length 68 [2021-11-07 01:59:10,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:10,221 INFO L470 AbstractCegarLoop]: Abstraction has 3541 states and 6646 transitions. [2021-11-07 01:59:10,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:10,223 INFO L276 IsEmpty]: Start isEmpty. Operand 3541 states and 6646 transitions. [2021-11-07 01:59:10,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:59:10,227 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:10,227 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:59:10,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:10,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:59:10,444 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:59:10,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:10,444 INFO L85 PathProgramCache]: Analyzing trace with hash -495532427, now seen corresponding path program 1 times [2021-11-07 01:59:10,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:59:10,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [61140653] [2021-11-07 01:59:10,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:10,445 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:59:10,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:59:10,446 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:59:10,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:59:10,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:10,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:59:10,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:11,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:11,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:11,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:11,347 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:59:11,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [61140653] [2021-11-07 01:59:11,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [61140653] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:11,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:59:11,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:59:11,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599788519] [2021-11-07 01:59:11,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:59:11,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:59:11,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:59:11,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:59:11,350 INFO L87 Difference]: Start difference. First operand 3541 states and 6646 transitions. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:14,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:14,053 INFO L93 Difference]: Finished difference Result 38141 states and 71894 transitions. [2021-11-07 01:59:14,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:59:14,054 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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 70 [2021-11-07 01:59:14,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:14,162 INFO L225 Difference]: With dead ends: 38141 [2021-11-07 01:59:14,162 INFO L226 Difference]: Without dead ends: 34627 [2021-11-07 01:59:14,178 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:59:14,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34627 states. [2021-11-07 01:59:14,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34627 to 3545. [2021-11-07 01:59:14,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3545 states, 3540 states have (on average 1.8782485875706214) internal successors, (6649), 3544 states have internal predecessors, (6649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:14,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3545 states to 3545 states and 6649 transitions. [2021-11-07 01:59:14,790 INFO L78 Accepts]: Start accepts. Automaton has 3545 states and 6649 transitions. Word has length 70 [2021-11-07 01:59:14,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:14,791 INFO L470 AbstractCegarLoop]: Abstraction has 3545 states and 6649 transitions. [2021-11-07 01:59:14,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:14,791 INFO L276 IsEmpty]: Start isEmpty. Operand 3545 states and 6649 transitions. [2021-11-07 01:59:14,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:59:14,797 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:14,797 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:59:14,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:15,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:59:15,012 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:59:15,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:15,013 INFO L85 PathProgramCache]: Analyzing trace with hash -729377368, now seen corresponding path program 1 times [2021-11-07 01:59:15,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:59:15,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2133763026] [2021-11-07 01:59:15,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:15,014 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:59:15,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:59:15,016 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:59:15,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:59:15,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:15,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:59:15,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:15,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:15,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:15,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:15,897 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:59:15,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2133763026] [2021-11-07 01:59:15,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2133763026] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:15,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:59:15,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:59:15,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752422757] [2021-11-07 01:59:15,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:59:15,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:59:15,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:59:15,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:59:15,900 INFO L87 Difference]: Start difference. First operand 3545 states and 6649 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:16,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:16,141 INFO L93 Difference]: Finished difference Result 7038 states and 13229 transitions. [2021-11-07 01:59:16,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:59:16,142 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 01:59:16,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:16,153 INFO L225 Difference]: With dead ends: 7038 [2021-11-07 01:59:16,153 INFO L226 Difference]: Without dead ends: 3524 [2021-11-07 01:59:16,160 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:59:16,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3524 states. [2021-11-07 01:59:16,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3524 to 3524. [2021-11-07 01:59:16,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3524 states, 3519 states have (on average 1.878658709860756) internal successors, (6611), 3523 states have internal predecessors, (6611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:16,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3524 states to 3524 states and 6611 transitions. [2021-11-07 01:59:16,474 INFO L78 Accepts]: Start accepts. Automaton has 3524 states and 6611 transitions. Word has length 72 [2021-11-07 01:59:16,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:16,475 INFO L470 AbstractCegarLoop]: Abstraction has 3524 states and 6611 transitions. [2021-11-07 01:59:16,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:16,475 INFO L276 IsEmpty]: Start isEmpty. Operand 3524 states and 6611 transitions. [2021-11-07 01:59:16,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:59:16,480 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:16,480 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:59:16,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-07 01:59:16,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:59:16,696 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:59:16,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:16,697 INFO L85 PathProgramCache]: Analyzing trace with hash -2123304368, now seen corresponding path program 1 times [2021-11-07 01:59:16,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:59:16,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1140980706] [2021-11-07 01:59:16,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:16,698 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:59:16,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:59:16,699 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:59:16,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:59:17,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:17,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:59:17,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:17,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:17,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:17,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:17,638 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:59:17,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1140980706] [2021-11-07 01:59:17,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1140980706] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:17,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:59:17,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:59:17,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634685079] [2021-11-07 01:59:17,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:59:17,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:59:17,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:59:17,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:59:17,641 INFO L87 Difference]: Start difference. First operand 3524 states and 6611 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:17,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:17,983 INFO L93 Difference]: Finished difference Result 6982 states and 13132 transitions. [2021-11-07 01:59:17,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:59:17,984 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 01:59:17,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:17,996 INFO L225 Difference]: With dead ends: 6982 [2021-11-07 01:59:17,996 INFO L226 Difference]: Without dead ends: 3499 [2021-11-07 01:59:18,004 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:59:18,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3499 states. [2021-11-07 01:59:18,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3499 to 3499. [2021-11-07 01:59:18,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3499 states, 3494 states have (on average 1.8795077275329135) internal successors, (6567), 3498 states have internal predecessors, (6567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:18,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3499 states to 3499 states and 6567 transitions. [2021-11-07 01:59:18,255 INFO L78 Accepts]: Start accepts. Automaton has 3499 states and 6567 transitions. Word has length 73 [2021-11-07 01:59:18,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:18,256 INFO L470 AbstractCegarLoop]: Abstraction has 3499 states and 6567 transitions. [2021-11-07 01:59:18,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:18,256 INFO L276 IsEmpty]: Start isEmpty. Operand 3499 states and 6567 transitions. [2021-11-07 01:59:18,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:59:18,262 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:18,262 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:59:18,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:18,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:59:18,464 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:59:18,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:18,465 INFO L85 PathProgramCache]: Analyzing trace with hash -192102503, now seen corresponding path program 1 times [2021-11-07 01:59:18,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:59:18,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [504963191] [2021-11-07 01:59:18,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:18,465 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:59:18,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:59:18,466 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:59:18,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:59:19,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:19,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:59:19,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:19,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:19,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:19,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:19,451 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:59:19,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [504963191] [2021-11-07 01:59:19,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [504963191] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:19,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:59:19,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:59:19,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987026181] [2021-11-07 01:59:19,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:59:19,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:59:19,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:59:19,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:59:19,454 INFO L87 Difference]: Start difference. First operand 3499 states and 6567 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:19,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:19,736 INFO L93 Difference]: Finished difference Result 6957 states and 13088 transitions. [2021-11-07 01:59:19,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:59:19,736 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 01:59:19,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:19,745 INFO L225 Difference]: With dead ends: 6957 [2021-11-07 01:59:19,745 INFO L226 Difference]: Without dead ends: 3496 [2021-11-07 01:59:19,751 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:59:19,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3496 states. [2021-11-07 01:59:20,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3496 to 3496. [2021-11-07 01:59:20,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3496 states, 3491 states have (on average 1.8788312804354053) internal successors, (6559), 3495 states have internal predecessors, (6559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:20,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3496 states to 3496 states and 6559 transitions. [2021-11-07 01:59:20,058 INFO L78 Accepts]: Start accepts. Automaton has 3496 states and 6559 transitions. Word has length 74 [2021-11-07 01:59:20,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:20,058 INFO L470 AbstractCegarLoop]: Abstraction has 3496 states and 6559 transitions. [2021-11-07 01:59:20,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:20,059 INFO L276 IsEmpty]: Start isEmpty. Operand 3496 states and 6559 transitions. [2021-11-07 01:59:20,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:59:20,063 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:20,063 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:59:20,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:20,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:59:20,280 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:59:20,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:20,281 INFO L85 PathProgramCache]: Analyzing trace with hash -953941110, now seen corresponding path program 1 times [2021-11-07 01:59:20,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:59:20,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1997903700] [2021-11-07 01:59:20,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:20,282 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:59:20,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:59:20,284 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:59:20,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:59:21,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:21,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 01:59:21,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:21,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:21,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:21,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:21,501 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:59:21,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1997903700] [2021-11-07 01:59:21,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1997903700] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:21,501 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:59:21,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:59:21,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514586121] [2021-11-07 01:59:21,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:59:21,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:59:21,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:59:21,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:59:21,503 INFO L87 Difference]: Start difference. First operand 3496 states and 6559 transitions. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:21,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:21,799 INFO L93 Difference]: Finished difference Result 6948 states and 13070 transitions. [2021-11-07 01:59:21,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:59:21,800 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 01:59:21,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:21,805 INFO L225 Difference]: With dead ends: 6948 [2021-11-07 01:59:21,805 INFO L226 Difference]: Without dead ends: 3494 [2021-11-07 01:59:21,811 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:59:21,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3494 states. [2021-11-07 01:59:22,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3494 to 3494. [2021-11-07 01:59:22,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3494 states, 3489 states have (on average 1.878188592719977) internal successors, (6553), 3493 states have internal predecessors, (6553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:22,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3494 states to 3494 states and 6553 transitions. [2021-11-07 01:59:22,091 INFO L78 Accepts]: Start accepts. Automaton has 3494 states and 6553 transitions. Word has length 75 [2021-11-07 01:59:22,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:22,093 INFO L470 AbstractCegarLoop]: Abstraction has 3494 states and 6553 transitions. [2021-11-07 01:59:22,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:22,094 INFO L276 IsEmpty]: Start isEmpty. Operand 3494 states and 6553 transitions. [2021-11-07 01:59:22,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 01:59:22,098 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:22,098 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] [2021-11-07 01:59:22,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:22,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:59:22,312 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:59:22,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:22,313 INFO L85 PathProgramCache]: Analyzing trace with hash 461884350, now seen corresponding path program 1 times [2021-11-07 01:59:22,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:59:22,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1530524872] [2021-11-07 01:59:22,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:22,314 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:59:22,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:59:22,315 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:59:22,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:59:22,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:23,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:59:23,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:23,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:23,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:23,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:23,483 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:59:23,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1530524872] [2021-11-07 01:59:23,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1530524872] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:23,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:59:23,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:59:23,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625018882] [2021-11-07 01:59:23,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:59:23,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:59:23,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:59:23,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:59:23,486 INFO L87 Difference]: Start difference. First operand 3494 states and 6553 transitions. Second operand has 8 states, 8 states have (on average 11.25) internal successors, (90), 8 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:23,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:23,757 INFO L93 Difference]: Finished difference Result 6941 states and 13055 transitions. [2021-11-07 01:59:23,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:59:23,757 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.25) internal successors, (90), 8 states have internal predecessors, (90), 0 states have call successors, (0), 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 [2021-11-07 01:59:23,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:23,763 INFO L225 Difference]: With dead ends: 6941 [2021-11-07 01:59:23,763 INFO L226 Difference]: Without dead ends: 3492 [2021-11-07 01:59:23,768 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:59:23,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3492 states. [2021-11-07 01:59:24,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3492 to 3492. [2021-11-07 01:59:24,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3492 states, 3487 states have (on average 1.877545167765988) internal successors, (6547), 3491 states have internal predecessors, (6547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:24,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3492 states to 3492 states and 6547 transitions. [2021-11-07 01:59:24,058 INFO L78 Accepts]: Start accepts. Automaton has 3492 states and 6547 transitions. Word has length 76 [2021-11-07 01:59:24,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:24,059 INFO L470 AbstractCegarLoop]: Abstraction has 3492 states and 6547 transitions. [2021-11-07 01:59:24,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.25) internal successors, (90), 8 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:24,059 INFO L276 IsEmpty]: Start isEmpty. Operand 3492 states and 6547 transitions. [2021-11-07 01:59:24,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:59:24,064 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:24,064 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:59:24,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:24,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:59:24,280 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:59:24,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:24,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1274391233, now seen corresponding path program 1 times [2021-11-07 01:59:24,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:59:24,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1333202348] [2021-11-07 01:59:24,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:24,282 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:59:24,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:59:24,283 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:59:24,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:59:25,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:25,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:59:25,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:25,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:25,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:27,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:27,506 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:59:27,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1333202348] [2021-11-07 01:59:27,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1333202348] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:27,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:59:27,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 01:59:27,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471890102] [2021-11-07 01:59:27,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:59:27,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:59:27,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:59:27,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:59:27,508 INFO L87 Difference]: Start difference. First operand 3492 states and 6547 transitions. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:30,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:30,909 INFO L93 Difference]: Finished difference Result 11085 states and 20881 transitions. [2021-11-07 01:59:30,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:59:30,913 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-07 01:59:30,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:30,924 INFO L225 Difference]: With dead ends: 11085 [2021-11-07 01:59:30,924 INFO L226 Difference]: Without dead ends: 7655 [2021-11-07 01:59:30,928 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:59:30,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7655 states. [2021-11-07 01:59:31,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7655 to 4980. [2021-11-07 01:59:31,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4980 states, 4975 states have (on average 1.8812060301507538) internal successors, (9359), 4979 states have internal predecessors, (9359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:31,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4980 states to 4980 states and 9359 transitions. [2021-11-07 01:59:31,273 INFO L78 Accepts]: Start accepts. Automaton has 4980 states and 9359 transitions. Word has length 77 [2021-11-07 01:59:31,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:31,274 INFO L470 AbstractCegarLoop]: Abstraction has 4980 states and 9359 transitions. [2021-11-07 01:59:31,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:31,274 INFO L276 IsEmpty]: Start isEmpty. Operand 4980 states and 9359 transitions. [2021-11-07 01:59:31,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 01:59:31,277 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:31,278 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:59:31,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:31,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:59:31,494 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:59:31,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:31,495 INFO L85 PathProgramCache]: Analyzing trace with hash 285573165, now seen corresponding path program 1 times [2021-11-07 01:59:31,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:59:31,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1995415674] [2021-11-07 01:59:31,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:31,495 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:59:31,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:59:31,496 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:59:31,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:59:32,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:32,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:59:32,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:32,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:32,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:32,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:32,760 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:59:32,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1995415674] [2021-11-07 01:59:32,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1995415674] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:32,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:59:32,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:59:32,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561930478] [2021-11-07 01:59:32,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:59:32,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:59:32,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:59:32,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:59:32,762 INFO L87 Difference]: Start difference. First operand 4980 states and 9359 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:38,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:38,327 INFO L93 Difference]: Finished difference Result 21158 states and 39673 transitions. [2021-11-07 01:59:38,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:59:38,327 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-07 01:59:38,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:38,356 INFO L225 Difference]: With dead ends: 21158 [2021-11-07 01:59:38,356 INFO L226 Difference]: Without dead ends: 16239 [2021-11-07 01:59:38,369 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:59:38,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16239 states. [2021-11-07 01:59:38,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16239 to 4986. [2021-11-07 01:59:38,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4986 states, 4981 states have (on average 1.8801445492872917) internal successors, (9365), 4985 states have internal predecessors, (9365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:38,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4986 states to 4986 states and 9365 transitions. [2021-11-07 01:59:38,876 INFO L78 Accepts]: Start accepts. Automaton has 4986 states and 9365 transitions. Word has length 78 [2021-11-07 01:59:38,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:38,876 INFO L470 AbstractCegarLoop]: Abstraction has 4986 states and 9365 transitions. [2021-11-07 01:59:38,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:38,877 INFO L276 IsEmpty]: Start isEmpty. Operand 4986 states and 9365 transitions. [2021-11-07 01:59:38,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:59:38,880 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:38,881 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:59:38,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:39,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:59:39,100 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:59:39,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:39,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1667607363, now seen corresponding path program 1 times [2021-11-07 01:59:39,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:59:39,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [257253055] [2021-11-07 01:59:39,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:39,102 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:59:39,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:59:39,103 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:59:39,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:59:39,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:39,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:59:39,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:40,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:40,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:40,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:40,309 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:59:40,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [257253055] [2021-11-07 01:59:40,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [257253055] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:40,310 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:59:40,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:59:40,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098578609] [2021-11-07 01:59:40,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:59:40,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:59:40,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:59:40,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:59:40,312 INFO L87 Difference]: Start difference. First operand 4986 states and 9365 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:49,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:49,668 INFO L93 Difference]: Finished difference Result 17066 states and 32056 transitions. [2021-11-07 01:59:49,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:59:49,669 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-07 01:59:49,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:49,697 INFO L225 Difference]: With dead ends: 17066 [2021-11-07 01:59:49,697 INFO L226 Difference]: Without dead ends: 13694 [2021-11-07 01:59:49,707 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:59:49,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13694 states. [2021-11-07 01:59:50,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13694 to 8596. [2021-11-07 01:59:50,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8596 states, 8591 states have (on average 1.8777790711209406) internal successors, (16132), 8595 states have internal predecessors, (16132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:50,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8596 states to 8596 states and 16132 transitions. [2021-11-07 01:59:50,306 INFO L78 Accepts]: Start accepts. Automaton has 8596 states and 16132 transitions. Word has length 79 [2021-11-07 01:59:50,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:50,307 INFO L470 AbstractCegarLoop]: Abstraction has 8596 states and 16132 transitions. [2021-11-07 01:59:50,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:50,307 INFO L276 IsEmpty]: Start isEmpty. Operand 8596 states and 16132 transitions. [2021-11-07 01:59:50,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 01:59:50,312 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:50,312 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:59:50,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:50,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:59:50,534 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:59:50,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:50,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1761612684, now seen corresponding path program 1 times [2021-11-07 01:59:50,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:59:50,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [313502981] [2021-11-07 01:59:50,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:50,535 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:59:50,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:59:50,536 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:59:50,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:59:51,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:51,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:59:51,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:51,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:51,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:51,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:51,790 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:59:51,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [313502981] [2021-11-07 01:59:51,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [313502981] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:51,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:59:51,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:59:51,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141343461] [2021-11-07 01:59:51,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:59:51,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:59:51,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:59:51,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:59:51,793 INFO L87 Difference]: Start difference. First operand 8596 states and 16132 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:55,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:55,961 INFO L93 Difference]: Finished difference Result 20506 states and 38295 transitions. [2021-11-07 01:59:55,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:59:55,961 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-07 01:59:55,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:55,981 INFO L225 Difference]: With dead ends: 20506 [2021-11-07 01:59:55,981 INFO L226 Difference]: Without dead ends: 13498 [2021-11-07 01:59:55,989 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:59:56,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13498 states. [2021-11-07 01:59:56,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13498 to 8573. [2021-11-07 01:59:56,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8573 states, 8568 states have (on average 1.8452380952380953) internal successors, (15810), 8572 states have internal predecessors, (15810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:56,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8573 states to 8573 states and 15810 transitions. [2021-11-07 01:59:56,525 INFO L78 Accepts]: Start accepts. Automaton has 8573 states and 15810 transitions. Word has length 80 [2021-11-07 01:59:56,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:56,526 INFO L470 AbstractCegarLoop]: Abstraction has 8573 states and 15810 transitions. [2021-11-07 01:59:56,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:56,526 INFO L276 IsEmpty]: Start isEmpty. Operand 8573 states and 15810 transitions. [2021-11-07 01:59:56,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 01:59:56,529 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:56,529 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:59:56,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:56,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:59:56,747 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:59:56,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:56,747 INFO L85 PathProgramCache]: Analyzing trace with hash -2035640683, now seen corresponding path program 1 times [2021-11-07 01:59:56,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:59:56,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1850837774] [2021-11-07 01:59:56,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:56,748 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:59:56,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:59:56,749 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:59:56,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:59:57,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:57,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:59:57,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:57,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:57,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:58,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:58,023 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:59:58,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1850837774] [2021-11-07 01:59:58,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1850837774] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:58,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:59:58,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:59:58,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753434582] [2021-11-07 01:59:58,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:59:58,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:59:58,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:59:58,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:59:58,025 INFO L87 Difference]: Start difference. First operand 8573 states and 15810 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:01,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:00:01,395 INFO L93 Difference]: Finished difference Result 57863 states and 107219 transitions. [2021-11-07 02:00:01,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:00:01,395 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-07 02:00:01,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:00:01,469 INFO L225 Difference]: With dead ends: 57863 [2021-11-07 02:00:01,469 INFO L226 Difference]: Without dead ends: 49347 [2021-11-07 02:00:01,485 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:00:01,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49347 states. [2021-11-07 02:00:02,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49347 to 13359. [2021-11-07 02:00:02,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13359 states, 13354 states have (on average 1.8475363187060057) internal successors, (24672), 13358 states have internal predecessors, (24672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:02,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13359 states to 13359 states and 24672 transitions. [2021-11-07 02:00:02,687 INFO L78 Accepts]: Start accepts. Automaton has 13359 states and 24672 transitions. Word has length 81 [2021-11-07 02:00:02,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:00:02,687 INFO L470 AbstractCegarLoop]: Abstraction has 13359 states and 24672 transitions. [2021-11-07 02:00:02,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:02,688 INFO L276 IsEmpty]: Start isEmpty. Operand 13359 states and 24672 transitions. [2021-11-07 02:00:02,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 02:00:02,690 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:00:02,690 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:00:02,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:00:02,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:00:02,908 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:00:02,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:00:02,908 INFO L85 PathProgramCache]: Analyzing trace with hash 2019114092, now seen corresponding path program 1 times [2021-11-07 02:00:02,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:00:02,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [837128777] [2021-11-07 02:00:02,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:00:02,909 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:00:02,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:00:02,910 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:00:02,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:00:03,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:00:03,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:00:03,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:00:03,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:00:03,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:00:04,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:00:04,224 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:00:04,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [837128777] [2021-11-07 02:00:04,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [837128777] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:00:04,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:00:04,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:00:04,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138732160] [2021-11-07 02:00:04,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:00:04,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:00:04,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:00:04,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:00:04,227 INFO L87 Difference]: Start difference. First operand 13359 states and 24672 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:05,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:00:05,699 INFO L93 Difference]: Finished difference Result 34351 states and 63517 transitions. [2021-11-07 02:00:05,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:00:05,699 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-07 02:00:05,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:00:05,727 INFO L225 Difference]: With dead ends: 34351 [2021-11-07 02:00:05,727 INFO L226 Difference]: Without dead ends: 22840 [2021-11-07 02:00:05,737 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:00:05,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22840 states. [2021-11-07 02:00:07,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22840 to 22825. [2021-11-07 02:00:07,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22825 states, 22820 states have (on average 1.8486853637160385) internal successors, (42187), 22824 states have internal predecessors, (42187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:07,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22825 states to 22825 states and 42187 transitions. [2021-11-07 02:00:07,178 INFO L78 Accepts]: Start accepts. Automaton has 22825 states and 42187 transitions. Word has length 82 [2021-11-07 02:00:07,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:00:07,179 INFO L470 AbstractCegarLoop]: Abstraction has 22825 states and 42187 transitions. [2021-11-07 02:00:07,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:07,179 INFO L276 IsEmpty]: Start isEmpty. Operand 22825 states and 42187 transitions. [2021-11-07 02:00:07,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 02:00:07,181 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:00:07,181 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] [2021-11-07 02:00:07,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:00:07,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:00:07,382 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:00:07,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:00:07,382 INFO L85 PathProgramCache]: Analyzing trace with hash 773716092, now seen corresponding path program 1 times [2021-11-07 02:00:07,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:00:07,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [173550800] [2021-11-07 02:00:07,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:00:07,383 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:00:07,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:00:07,384 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:00:07,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 02:00:08,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:00:08,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:00:08,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:00:08,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:00:08,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:00:08,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:00:08,780 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:00:08,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [173550800] [2021-11-07 02:00:08,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [173550800] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:00:08,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:00:08,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:00:08,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32965526] [2021-11-07 02:00:08,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:00:08,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:00:08,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:00:08,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:00:08,783 INFO L87 Difference]: Start difference. First operand 22825 states and 42187 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) [2021-11-07 02:00:11,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:00:11,758 INFO L93 Difference]: Finished difference Result 61491 states and 113710 transitions. [2021-11-07 02:00:11,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:00:11,758 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 [2021-11-07 02:00:11,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:00:11,820 INFO L225 Difference]: With dead ends: 61491 [2021-11-07 02:00:11,821 INFO L226 Difference]: Without dead ends: 41586 [2021-11-07 02:00:11,839 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 [2021-11-07 02:00:11,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41586 states. [2021-11-07 02:00:14,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41586 to 41571. [2021-11-07 02:00:14,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41571 states, 41566 states have (on average 1.8489390367126979) internal successors, (76853), 41570 states have internal predecessors, (76853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:14,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41571 states to 41571 states and 76853 transitions. [2021-11-07 02:00:14,846 INFO L78 Accepts]: Start accepts. Automaton has 41571 states and 76853 transitions. Word has length 83 [2021-11-07 02:00:14,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:00:14,847 INFO L470 AbstractCegarLoop]: Abstraction has 41571 states and 76853 transitions. [2021-11-07 02:00:14,847 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) [2021-11-07 02:00:14,847 INFO L276 IsEmpty]: Start isEmpty. Operand 41571 states and 76853 transitions. [2021-11-07 02:00:14,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 02:00:14,849 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:00:14,849 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:00:14,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 02:00:15,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:00:15,050 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:00:15,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:00:15,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1545028431, now seen corresponding path program 1 times [2021-11-07 02:00:15,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:00:15,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2113961684] [2021-11-07 02:00:15,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:00:15,051 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:00:15,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:00:15,052 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:00:15,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 02:00:15,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:00:15,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:00:15,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:00:16,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:00:16,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:00:16,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:00:16,522 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:00:16,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2113961684] [2021-11-07 02:00:16,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2113961684] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:00:16,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:00:16,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:00:16,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31215416] [2021-11-07 02:00:16,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:00:16,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:00:16,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:00:16,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:00:16,525 INFO L87 Difference]: Start difference. First operand 41571 states and 76853 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) [2021-11-07 02:00:22,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:00:22,299 INFO L93 Difference]: Finished difference Result 115399 states and 213319 transitions. [2021-11-07 02:00:22,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:00:22,300 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 [2021-11-07 02:00:22,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:00:22,426 INFO L225 Difference]: With dead ends: 115399 [2021-11-07 02:00:22,427 INFO L226 Difference]: Without dead ends: 78676 [2021-11-07 02:00:22,460 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 [2021-11-07 02:00:22,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78676 states. [2021-11-07 02:00:28,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78676 to 78661. [2021-11-07 02:00:28,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78661 states, 78656 states have (on average 1.8480344792514238) internal successors, (145359), 78660 states have internal predecessors, (145359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:28,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78661 states to 78661 states and 145359 transitions. [2021-11-07 02:00:28,544 INFO L78 Accepts]: Start accepts. Automaton has 78661 states and 145359 transitions. Word has length 84 [2021-11-07 02:00:28,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:00:28,545 INFO L470 AbstractCegarLoop]: Abstraction has 78661 states and 145359 transitions. [2021-11-07 02:00:28,545 INFO L471 AbstractCegarLoop]: INTERPOLANT 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) [2021-11-07 02:00:28,545 INFO L276 IsEmpty]: Start isEmpty. Operand 78661 states and 145359 transitions. [2021-11-07 02:00:28,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 02:00:28,547 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:00:28,547 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:00:28,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 02:00:28,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:00:28,749 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:00:28,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:00:28,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1517190497, now seen corresponding path program 1 times [2021-11-07 02:00:28,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:00:28,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1272731733] [2021-11-07 02:00:28,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:00:28,751 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:00:28,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:00:28,751 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:00:28,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef67a29c-74c7-4a04-aeca-23578acd89e2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 02:00:29,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:00:29,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:00:29,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:00:30,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:00:30,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:00:30,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:00:30,316 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:00:30,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1272731733] [2021-11-07 02:00:30,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1272731733] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:00:30,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:00:30,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:00:30,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055513187] [2021-11-07 02:00:30,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:00:30,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:00:30,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:00:30,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:00:30,319 INFO L87 Difference]: Start difference. First operand 78661 states and 145359 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)