./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product27.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_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/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_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/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_71c4634b-c17c-4537-8612-7f6e6c0b0650/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 b90339f9090766921b1c16763101e1e0bf56713d98b802bfaa51b02dabc40a61 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:32:32,823 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:32:32,827 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:32:32,891 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:32:32,892 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:32:32,893 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:32:32,895 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:32:32,899 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:32:32,902 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:32:32,903 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:32:32,905 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:32:32,907 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:32:32,908 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:32:32,910 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:32:32,912 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:32:32,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:32:32,915 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:32:32,917 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:32:32,920 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:32:32,924 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:32:32,927 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:32:32,929 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:32:32,931 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:32:32,932 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:32:32,938 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:32:32,939 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:32:32,939 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:32:32,941 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:32:32,941 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:32:32,943 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:32:32,944 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:32:32,945 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:32:32,947 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:32:32,948 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:32:32,950 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:32:32,951 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:32:32,952 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:32:32,953 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:32:32,953 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:32:32,955 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:32:32,956 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:32:32,957 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:32:33,002 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:32:33,002 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:32:33,005 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:32:33,005 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:32:33,005 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:32:33,006 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:32:33,006 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:32:33,010 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:32:33,011 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:32:33,011 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:32:33,013 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:32:33,013 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:32:33,014 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:32:33,014 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:32:33,014 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:32:33,015 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:32:33,016 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:32:33,016 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:32:33,016 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:32:33,016 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:32:33,017 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:32:33,017 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:32:33,017 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:32:33,018 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:32:33,018 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:32:33,018 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:32:33,018 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:32:33,019 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:32:33,019 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:32:33,021 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:32:33,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:32:33,022 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:32:33,023 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:32:33,023 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:32:33,023 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:32:33,024 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:32:33,024 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:32:33,024 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:32:33,024 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:32:33,025 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_71c4634b-c17c-4537-8612-7f6e6c0b0650/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b90339f9090766921b1c16763101e1e0bf56713d98b802bfaa51b02dabc40a61 [2021-11-07 01:32:33,368 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:32:33,399 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:32:33,403 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:32:33,405 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:32:33,405 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:32:33,406 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c [2021-11-07 01:32:33,489 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/data/ac134c5ec/6dec91c0740a4adfbc7333f4c90784c1/FLAGdfc258e7c [2021-11-07 01:32:34,209 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:32:34,210 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c [2021-11-07 01:32:34,266 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/data/ac134c5ec/6dec91c0740a4adfbc7333f4c90784c1/FLAGdfc258e7c [2021-11-07 01:32:34,409 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/data/ac134c5ec/6dec91c0740a4adfbc7333f4c90784c1 [2021-11-07 01:32:34,414 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:32:34,417 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:32:34,419 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:32:34,420 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:32:34,426 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:32:34,427 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:32:34" (1/1) ... [2021-11-07 01:32:34,431 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c2a463e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:34, skipping insertion in model container [2021-11-07 01:32:34,431 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:32:34" (1/1) ... [2021-11-07 01:32:34,440 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:32:34,559 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:32:35,146 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_71c4634b-c17c-4537-8612-7f6e6c0b0650/sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c[35415,35428] [2021-11-07 01:32:35,359 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:32:35,374 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 01:32:35,375 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7e438c21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:35, skipping insertion in model container [2021-11-07 01:32:35,375 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:32:35,376 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:32:35,379 INFO L168 Benchmark]: Toolchain (without parser) took 960.45 ms. Allocated memory is still 94.4 MB. Free memory was 73.0 MB in the beginning and 44.9 MB in the end (delta: 28.1 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. [2021-11-07 01:32:35,380 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 75.5 MB. Free memory is still 49.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:32:35,381 INFO L168 Benchmark]: CACSL2BoogieTranslator took 956.69 ms. Allocated memory is still 94.4 MB. Free memory was 72.6 MB in the beginning and 44.9 MB in the end (delta: 27.7 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. [2021-11-07 01:32:35,386 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 75.5 MB. Free memory is still 49.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 956.69 ms. Allocated memory is still 94.4 MB. Free memory was 72.6 MB in the beginning and 44.9 MB in the end (delta: 27.7 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1281]: 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_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/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_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/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_71c4634b-c17c-4537-8612-7f6e6c0b0650/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 b90339f9090766921b1c16763101e1e0bf56713d98b802bfaa51b02dabc40a61 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:32:38,163 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:32:38,168 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:32:38,238 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:32:38,239 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:32:38,245 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:32:38,247 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:32:38,253 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:32:38,257 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:32:38,270 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:32:38,272 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:32:38,275 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:32:38,275 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:32:38,279 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:32:38,282 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:32:38,288 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:32:38,290 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:32:38,292 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:32:38,295 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:32:38,303 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:32:38,307 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:32:38,308 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:32:38,312 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:32:38,315 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:32:38,326 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:32:38,329 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:32:38,329 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:32:38,332 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:32:38,333 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:32:38,334 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:32:38,334 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:32:38,336 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:32:38,338 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:32:38,340 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:32:38,342 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:32:38,342 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:32:38,344 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:32:38,344 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:32:38,345 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:32:38,347 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:32:38,348 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:32:38,349 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:32:38,416 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:32:38,417 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:32:38,419 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:32:38,420 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:32:38,420 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:32:38,420 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:32:38,421 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:32:38,421 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:32:38,422 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:32:38,424 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:32:38,426 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:32:38,426 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:32:38,427 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:32:38,427 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:32:38,427 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:32:38,428 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:32:38,428 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:32:38,428 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:32:38,429 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:32:38,429 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:32:38,429 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:32:38,429 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:32:38,430 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:32:38,430 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:32:38,431 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:32:38,431 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:32:38,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:32:38,432 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:32:38,432 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:32:38,432 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:32:38,433 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:32:38,433 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:32:38,433 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:32:38,434 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:32:38,434 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:32:38,434 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_71c4634b-c17c-4537-8612-7f6e6c0b0650/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b90339f9090766921b1c16763101e1e0bf56713d98b802bfaa51b02dabc40a61 [2021-11-07 01:32:38,970 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:32:39,003 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:32:39,007 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:32:39,009 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:32:39,010 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:32:39,012 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c [2021-11-07 01:32:39,113 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/data/e98c1d7ec/66ac4c7e0dc644e28bfba838cb7ea37c/FLAG9b04aabe6 [2021-11-07 01:32:40,098 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:32:40,099 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c [2021-11-07 01:32:40,141 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/data/e98c1d7ec/66ac4c7e0dc644e28bfba838cb7ea37c/FLAG9b04aabe6 [2021-11-07 01:32:40,658 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/data/e98c1d7ec/66ac4c7e0dc644e28bfba838cb7ea37c [2021-11-07 01:32:40,661 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:32:40,663 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:32:40,665 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:32:40,665 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:32:40,670 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:32:40,671 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:32:40" (1/1) ... [2021-11-07 01:32:40,672 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@364ee059 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:40, skipping insertion in model container [2021-11-07 01:32:40,673 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:32:40" (1/1) ... [2021-11-07 01:32:40,682 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:32:40,801 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:32:41,442 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_71c4634b-c17c-4537-8612-7f6e6c0b0650/sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c[35415,35428] [2021-11-07 01:32:41,712 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:32:41,735 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:32:41,761 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:32:41,870 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_71c4634b-c17c-4537-8612-7f6e6c0b0650/sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c[35415,35428] [2021-11-07 01:32:41,982 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:32:41,996 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:32:42,080 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_71c4634b-c17c-4537-8612-7f6e6c0b0650/sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c[35415,35428] [2021-11-07 01:32:42,157 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:32:42,216 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:32:42,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:42 WrapperNode [2021-11-07 01:32:42,217 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:32:42,219 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:32:42,219 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:32:42,220 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:32:42,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:42" (1/1) ... [2021-11-07 01:32:42,311 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:42" (1/1) ... [2021-11-07 01:32:42,553 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:32:42,554 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:32:42,554 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:32:42,554 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:32:42,565 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:42" (1/1) ... [2021-11-07 01:32:42,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:42" (1/1) ... [2021-11-07 01:32:42,584 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:42" (1/1) ... [2021-11-07 01:32:42,585 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:42" (1/1) ... [2021-11-07 01:32:42,664 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:42" (1/1) ... [2021-11-07 01:32:42,786 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:42" (1/1) ... [2021-11-07 01:32:42,807 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:42" (1/1) ... [2021-11-07 01:32:42,846 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:32:42,849 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:32:42,851 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:32:42,852 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:32:42,853 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:42" (1/1) ... [2021-11-07 01:32:42,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:32:42,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:32:42,898 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:32:42,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:32:43,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:32:43,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:32:43,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:32:43,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:32:53,804 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:32:53,804 INFO L299 CfgBuilder]: Removed 649 assume(true) statements. [2021-11-07 01:32:53,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:32:53 BoogieIcfgContainer [2021-11-07 01:32:53,812 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:32:53,815 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:32:53,815 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:32:53,818 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:32:53,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:32:40" (1/3) ... [2021-11-07 01:32:53,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b40bb0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:32:53, skipping insertion in model container [2021-11-07 01:32:53,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:32:42" (2/3) ... [2021-11-07 01:32:53,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b40bb0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:32:53, skipping insertion in model container [2021-11-07 01:32:53,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:32:53" (3/3) ... [2021-11-07 01:32:53,822 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product27.cil.c [2021-11-07 01:32:53,828 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:32:53,828 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 01:32:53,909 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:32:53,920 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 01:32:53,920 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 01:32:53,995 INFO L276 IsEmpty]: Start isEmpty. Operand has 2603 states, 2597 states have (on average 1.8814016172506738) internal successors, (4886), 2602 states have internal predecessors, (4886), 0 states have call successors, (0), 0 states 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 01:32:54,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 01:32:54,047 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:54,048 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:32:54,049 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 01:32:54,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:54,056 INFO L85 PathProgramCache]: Analyzing trace with hash 548572505, now seen corresponding path program 1 times [2021-11-07 01:32:54,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:54,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [888529472] [2021-11-07 01:32:54,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:54,077 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:54,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:54,084 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:54,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:32:54,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:54,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:32:54,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:54,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:32:54,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:54,823 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 01:32:54,824 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:54,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [888529472] [2021-11-07 01:32:54,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [888529472] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:54,825 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:54,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:32:54,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538222809] [2021-11-07 01:32:54,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:32:54,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:54,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:32:54,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:32:54,854 INFO L87 Difference]: Start difference. First operand has 2603 states, 2597 states have (on average 1.8814016172506738) internal successors, (4886), 2602 states have internal predecessors, (4886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:54,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:54,959 INFO L93 Difference]: Finished difference Result 2622 states and 4909 transitions. [2021-11-07 01:32:54,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:32:54,961 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-07 01:32:54,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:54,995 INFO L225 Difference]: With dead ends: 2622 [2021-11-07 01:32:54,996 INFO L226 Difference]: Without dead ends: 2599 [2021-11-07 01:32:55,001 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:32:55,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2599 states. [2021-11-07 01:32:55,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2599 to 2599. [2021-11-07 01:32:55,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2599 states, 2594 states have (on average 1.8789514263685427) internal successors, (4874), 2598 states have internal predecessors, (4874), 0 states have call successors, (0), 0 states 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 01:32:55,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2599 states to 2599 states and 4874 transitions. [2021-11-07 01:32:55,179 INFO L78 Accepts]: Start accepts. Automaton has 2599 states and 4874 transitions. Word has length 53 [2021-11-07 01:32:55,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:55,180 INFO L470 AbstractCegarLoop]: Abstraction has 2599 states and 4874 transitions. [2021-11-07 01:32:55,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:55,180 INFO L276 IsEmpty]: Start isEmpty. Operand 2599 states and 4874 transitions. [2021-11-07 01:32:55,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 01:32:55,184 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:55,185 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:32:55,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:55,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:55,392 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 01:32:55,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:55,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1767504764, now seen corresponding path program 1 times [2021-11-07 01:32:55,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:55,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [53441353] [2021-11-07 01:32:55,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:55,395 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:55,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:55,403 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:55,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:32:55,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:55,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:32:55,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:55,943 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 01:32:55,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:56,128 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 01:32:56,129 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:56,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [53441353] [2021-11-07 01:32:56,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [53441353] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:56,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:56,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:32:56,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349723572] [2021-11-07 01:32:56,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:32:56,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:56,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:32:56,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:32:56,136 INFO L87 Difference]: Start difference. First operand 2599 states and 4874 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:56,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:56,457 INFO L93 Difference]: Finished difference Result 7717 states and 14479 transitions. [2021-11-07 01:32:56,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:32:56,458 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-07 01:32:56,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:56,495 INFO L225 Difference]: With dead ends: 7717 [2021-11-07 01:32:56,495 INFO L226 Difference]: Without dead ends: 5131 [2021-11-07 01:32:56,506 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:32:56,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5131 states. [2021-11-07 01:32:56,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5131 to 2599. [2021-11-07 01:32:56,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2599 states, 2594 states have (on average 1.8762528912875867) internal successors, (4867), 2598 states have internal predecessors, (4867), 0 states have call successors, (0), 0 states 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 01:32:56,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2599 states to 2599 states and 4867 transitions. [2021-11-07 01:32:56,691 INFO L78 Accepts]: Start accepts. Automaton has 2599 states and 4867 transitions. Word has length 55 [2021-11-07 01:32:56,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:56,692 INFO L470 AbstractCegarLoop]: Abstraction has 2599 states and 4867 transitions. [2021-11-07 01:32:56,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:56,692 INFO L276 IsEmpty]: Start isEmpty. Operand 2599 states and 4867 transitions. [2021-11-07 01:32:56,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 01:32:56,696 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:56,696 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:32:56,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:56,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:56,909 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 01:32:56,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:56,910 INFO L85 PathProgramCache]: Analyzing trace with hash 76116505, now seen corresponding path program 1 times [2021-11-07 01:32:56,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:56,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1013514894] [2021-11-07 01:32:56,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:56,912 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:56,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:56,913 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:56,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:32:57,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:57,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:32:57,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:57,485 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 01:32:57,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:57,661 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 01:32:57,661 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:57,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1013514894] [2021-11-07 01:32:57,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1013514894] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:57,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:57,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:32:57,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358840536] [2021-11-07 01:32:57,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:32:57,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:57,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:32:57,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:32:57,665 INFO L87 Difference]: Start difference. First operand 2599 states and 4867 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:58,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:58,938 INFO L93 Difference]: Finished difference Result 17668 states and 33121 transitions. [2021-11-07 01:32:58,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:32:58,938 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-07 01:32:58,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:59,061 INFO L225 Difference]: With dead ends: 17668 [2021-11-07 01:32:59,062 INFO L226 Difference]: Without dead ends: 15091 [2021-11-07 01:32:59,071 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:32:59,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15091 states. [2021-11-07 01:32:59,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15091 to 2577. [2021-11-07 01:32:59,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2577 states, 2572 states have (on average 1.8724727838258164) internal successors, (4816), 2576 states have internal predecessors, (4816), 0 states have call successors, (0), 0 states 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 01:32:59,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2577 states to 2577 states and 4816 transitions. [2021-11-07 01:32:59,337 INFO L78 Accepts]: Start accepts. Automaton has 2577 states and 4816 transitions. Word has length 61 [2021-11-07 01:32:59,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:59,337 INFO L470 AbstractCegarLoop]: Abstraction has 2577 states and 4816 transitions. [2021-11-07 01:32:59,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:59,338 INFO L276 IsEmpty]: Start isEmpty. Operand 2577 states and 4816 transitions. [2021-11-07 01:32:59,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 01:32:59,341 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:59,341 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:32:59,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:59,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:59,557 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 01:32:59,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:59,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1836697286, now seen corresponding path program 1 times [2021-11-07 01:32:59,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:59,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [853001851] [2021-11-07 01:32:59,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:59,560 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:59,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:59,561 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:59,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:33:00,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:00,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:33:00,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:00,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:33:00,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:00,397 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 01:33:00,397 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:00,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [853001851] [2021-11-07 01:33:00,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [853001851] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:00,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:00,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:33:00,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372056184] [2021-11-07 01:33:00,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:33:00,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:00,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:33:00,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:33:00,399 INFO L87 Difference]: Start difference. First operand 2577 states and 4816 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:00,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:00,842 INFO L93 Difference]: Finished difference Result 7628 states and 14283 transitions. [2021-11-07 01:33:00,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:33:00,843 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-07 01:33:00,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:00,868 INFO L225 Difference]: With dead ends: 7628 [2021-11-07 01:33:00,868 INFO L226 Difference]: Without dead ends: 5073 [2021-11-07 01:33:00,876 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:33:00,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5073 states. [2021-11-07 01:33:01,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5073 to 2577. [2021-11-07 01:33:01,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2577 states, 2572 states have (on average 1.8681959564541213) internal successors, (4805), 2576 states have internal predecessors, (4805), 0 states have call successors, (0), 0 states 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 01:33:01,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2577 states to 2577 states and 4805 transitions. [2021-11-07 01:33:01,124 INFO L78 Accepts]: Start accepts. Automaton has 2577 states and 4805 transitions. Word has length 63 [2021-11-07 01:33:01,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:01,125 INFO L470 AbstractCegarLoop]: Abstraction has 2577 states and 4805 transitions. [2021-11-07 01:33:01,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:01,125 INFO L276 IsEmpty]: Start isEmpty. Operand 2577 states and 4805 transitions. [2021-11-07 01:33:01,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:33:01,130 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:01,130 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:01,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:01,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:01,344 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 01:33:01,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:01,345 INFO L85 PathProgramCache]: Analyzing trace with hash 249373071, now seen corresponding path program 1 times [2021-11-07 01:33:01,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:01,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1155684298] [2021-11-07 01:33:01,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:01,346 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:01,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:01,347 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:01,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:33:01,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:01,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 01:33:01,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:02,147 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 01:33:02,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:02,428 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 01:33:02,428 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:02,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1155684298] [2021-11-07 01:33:02,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1155684298] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:02,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:02,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:33:02,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712188898] [2021-11-07 01:33:02,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:33:02,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:02,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:33:02,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:33:02,431 INFO L87 Difference]: Start difference. First operand 2577 states and 4805 transitions. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:05,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:05,295 INFO L93 Difference]: Finished difference Result 27591 states and 51689 transitions. [2021-11-07 01:33:05,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:33:05,296 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 01:33:05,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:05,438 INFO L225 Difference]: With dead ends: 27591 [2021-11-07 01:33:05,438 INFO L226 Difference]: Without dead ends: 25039 [2021-11-07 01:33:05,454 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:33:05,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25039 states. [2021-11-07 01:33:05,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25039 to 2579. [2021-11-07 01:33:05,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2579 states, 2574 states have (on average 1.8655788655788657) internal successors, (4802), 2578 states have internal predecessors, (4802), 0 states have call successors, (0), 0 states 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 01:33:05,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2579 states to 2579 states and 4802 transitions. [2021-11-07 01:33:05,937 INFO L78 Accepts]: Start accepts. Automaton has 2579 states and 4802 transitions. Word has length 69 [2021-11-07 01:33:05,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:05,938 INFO L470 AbstractCegarLoop]: Abstraction has 2579 states and 4802 transitions. [2021-11-07 01:33:05,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:05,938 INFO L276 IsEmpty]: Start isEmpty. Operand 2579 states and 4802 transitions. [2021-11-07 01:33:05,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:33:05,942 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:05,942 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:05,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:06,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:06,161 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 01:33:06,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:06,162 INFO L85 PathProgramCache]: Analyzing trace with hash -986874142, now seen corresponding path program 1 times [2021-11-07 01:33:06,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:06,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1142514300] [2021-11-07 01:33:06,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:06,164 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:06,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:06,165 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:06,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:33:06,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:06,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:33:06,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:07,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:33:07,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:07,314 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 01:33:07,314 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:07,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1142514300] [2021-11-07 01:33:07,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1142514300] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:07,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:07,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:33:07,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463495452] [2021-11-07 01:33:07,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:33:07,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:07,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:33:07,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:33:07,317 INFO L87 Difference]: Start difference. First operand 2579 states and 4802 transitions. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:09,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:09,636 INFO L93 Difference]: Finished difference Result 27559 states and 51610 transitions. [2021-11-07 01:33:09,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:33:09,637 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 01:33:09,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:09,710 INFO L225 Difference]: With dead ends: 27559 [2021-11-07 01:33:09,710 INFO L226 Difference]: Without dead ends: 25007 [2021-11-07 01:33:09,721 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:33:09,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25007 states. [2021-11-07 01:33:10,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25007 to 2583. [2021-11-07 01:33:10,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2583 states, 2578 states have (on average 1.8638479441427462) internal successors, (4805), 2582 states have internal predecessors, (4805), 0 states have call successors, (0), 0 states 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 01:33:10,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2583 states to 2583 states and 4805 transitions. [2021-11-07 01:33:10,280 INFO L78 Accepts]: Start accepts. Automaton has 2583 states and 4805 transitions. Word has length 71 [2021-11-07 01:33:10,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:10,281 INFO L470 AbstractCegarLoop]: Abstraction has 2583 states and 4805 transitions. [2021-11-07 01:33:10,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:10,283 INFO L276 IsEmpty]: Start isEmpty. Operand 2583 states and 4805 transitions. [2021-11-07 01:33:10,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:33:10,286 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:10,286 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:10,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:10,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:10,502 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 01:33:10,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:10,502 INFO L85 PathProgramCache]: Analyzing trace with hash 353867279, now seen corresponding path program 1 times [2021-11-07 01:33:10,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:10,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1081158190] [2021-11-07 01:33:10,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:10,504 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:10,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:10,505 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:10,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:33:11,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:11,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:33:11,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:11,263 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 01:33:11,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:11,477 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 01:33:11,477 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:11,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1081158190] [2021-11-07 01:33:11,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1081158190] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:11,478 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:11,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:33:11,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835609279] [2021-11-07 01:33:11,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:33:11,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:11,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:33:11,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:33:11,481 INFO L87 Difference]: Start difference. First operand 2583 states and 4805 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:11,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:11,722 INFO L93 Difference]: Finished difference Result 5114 states and 9541 transitions. [2021-11-07 01:33:11,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:33:11,723 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 01:33:11,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:11,729 INFO L225 Difference]: With dead ends: 5114 [2021-11-07 01:33:11,730 INFO L226 Difference]: Without dead ends: 2562 [2021-11-07 01:33:11,734 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:33:11,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2562 states. [2021-11-07 01:33:11,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2562 to 2562. [2021-11-07 01:33:11,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2562 states, 2557 states have (on average 1.8642940946421587) internal successors, (4767), 2561 states have internal predecessors, (4767), 0 states have call successors, (0), 0 states 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 01:33:11,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2562 states to 2562 states and 4767 transitions. [2021-11-07 01:33:11,920 INFO L78 Accepts]: Start accepts. Automaton has 2562 states and 4767 transitions. Word has length 73 [2021-11-07 01:33:11,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:11,921 INFO L470 AbstractCegarLoop]: Abstraction has 2562 states and 4767 transitions. [2021-11-07 01:33:11,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:11,921 INFO L276 IsEmpty]: Start isEmpty. Operand 2562 states and 4767 transitions. [2021-11-07 01:33:11,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:33:11,924 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:11,925 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:11,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:12,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:12,140 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 01:33:12,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:12,140 INFO L85 PathProgramCache]: Analyzing trace with hash 91803239, now seen corresponding path program 1 times [2021-11-07 01:33:12,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:12,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2098375367] [2021-11-07 01:33:12,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:12,142 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:12,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:12,143 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:12,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:33:12,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:12,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:33:12,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:12,865 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 01:33:12,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:13,034 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 01:33:13,035 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:13,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2098375367] [2021-11-07 01:33:13,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2098375367] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:13,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:13,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:33:13,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859691596] [2021-11-07 01:33:13,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:33:13,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:13,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:33:13,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:33:13,038 INFO L87 Difference]: Start difference. First operand 2562 states and 4767 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:13,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:13,316 INFO L93 Difference]: Finished difference Result 5058 states and 9444 transitions. [2021-11-07 01:33:13,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:33:13,317 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 01:33:13,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:13,322 INFO L225 Difference]: With dead ends: 5058 [2021-11-07 01:33:13,322 INFO L226 Difference]: Without dead ends: 2537 [2021-11-07 01:33:13,325 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:33:13,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2537 states. [2021-11-07 01:33:13,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2537 to 2537. [2021-11-07 01:33:13,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2537 states, 2532 states have (on average 1.8653238546603474) internal successors, (4723), 2536 states have internal predecessors, (4723), 0 states have call successors, (0), 0 states 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 01:33:13,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2537 states to 2537 states and 4723 transitions. [2021-11-07 01:33:13,473 INFO L78 Accepts]: Start accepts. Automaton has 2537 states and 4723 transitions. Word has length 74 [2021-11-07 01:33:13,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:13,474 INFO L470 AbstractCegarLoop]: Abstraction has 2537 states and 4723 transitions. [2021-11-07 01:33:13,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:13,474 INFO L276 IsEmpty]: Start isEmpty. Operand 2537 states and 4723 transitions. [2021-11-07 01:33:13,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:33:13,476 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:13,477 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 01:33:13,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:13,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:13,692 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 01:33:13,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:13,693 INFO L85 PathProgramCache]: Analyzing trace with hash -170481090, now seen corresponding path program 1 times [2021-11-07 01:33:13,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:13,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1370980251] [2021-11-07 01:33:13,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:13,694 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:13,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:13,694 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:13,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:33:14,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:14,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:33:14,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:14,430 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 01:33:14,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:14,608 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 01:33:14,609 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:14,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1370980251] [2021-11-07 01:33:14,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1370980251] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:14,612 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:14,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:33:14,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034404070] [2021-11-07 01:33:14,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:33:14,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:14,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:33:14,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:33:14,615 INFO L87 Difference]: Start difference. First operand 2537 states and 4723 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:14,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:14,798 INFO L93 Difference]: Finished difference Result 5033 states and 9400 transitions. [2021-11-07 01:33:14,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:33:14,799 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 01:33:14,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:14,805 INFO L225 Difference]: With dead ends: 5033 [2021-11-07 01:33:14,805 INFO L226 Difference]: Without dead ends: 2534 [2021-11-07 01:33:14,809 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:33:14,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2534 states. [2021-11-07 01:33:14,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2534 to 2534. [2021-11-07 01:33:14,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2534 states, 2529 states have (on average 1.8643732700672202) internal successors, (4715), 2533 states have internal predecessors, (4715), 0 states have call successors, (0), 0 states 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 01:33:14,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2534 states to 2534 states and 4715 transitions. [2021-11-07 01:33:14,963 INFO L78 Accepts]: Start accepts. Automaton has 2534 states and 4715 transitions. Word has length 75 [2021-11-07 01:33:14,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:14,963 INFO L470 AbstractCegarLoop]: Abstraction has 2534 states and 4715 transitions. [2021-11-07 01:33:14,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:14,964 INFO L276 IsEmpty]: Start isEmpty. Operand 2534 states and 4715 transitions. [2021-11-07 01:33:14,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 01:33:14,966 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:14,967 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 01:33:14,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:15,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:15,187 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 01:33:15,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:15,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1982325869, now seen corresponding path program 1 times [2021-11-07 01:33:15,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:15,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2052090485] [2021-11-07 01:33:15,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:15,188 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:15,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:15,189 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:15,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:33:15,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:15,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 01:33:15,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:15,980 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 01:33:15,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:16,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:33:16,196 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:16,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2052090485] [2021-11-07 01:33:16,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2052090485] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:16,196 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:16,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:33:16,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522270253] [2021-11-07 01:33:16,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:33:16,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:16,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:33:16,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:33:16,198 INFO L87 Difference]: Start difference. First operand 2534 states and 4715 transitions. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:16,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:16,512 INFO L93 Difference]: Finished difference Result 5024 states and 9382 transitions. [2021-11-07 01:33:16,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:33:16,513 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 01:33:16,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:16,518 INFO L225 Difference]: With dead ends: 5024 [2021-11-07 01:33:16,518 INFO L226 Difference]: Without dead ends: 2532 [2021-11-07 01:33:16,523 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 01:33:16,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2532 states. [2021-11-07 01:33:16,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2532 to 2532. [2021-11-07 01:33:16,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2532 states, 2527 states have (on average 1.8634744756628414) internal successors, (4709), 2531 states have internal predecessors, (4709), 0 states have call successors, (0), 0 states 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 01:33:16,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2532 states to 2532 states and 4709 transitions. [2021-11-07 01:33:16,717 INFO L78 Accepts]: Start accepts. Automaton has 2532 states and 4709 transitions. Word has length 76 [2021-11-07 01:33:16,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:16,718 INFO L470 AbstractCegarLoop]: Abstraction has 2532 states and 4709 transitions. [2021-11-07 01:33:16,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:16,719 INFO L276 IsEmpty]: Start isEmpty. Operand 2532 states and 4709 transitions. [2021-11-07 01:33:16,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:33:16,722 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:16,722 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 01:33:16,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:16,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:16,941 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 01:33:16,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:16,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1371725127, now seen corresponding path program 1 times [2021-11-07 01:33:16,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:16,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [245743289] [2021-11-07 01:33:16,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:16,942 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:16,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:16,943 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:16,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:33:17,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:17,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:33:17,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:17,895 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 01:33:17,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:18,097 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 01:33:18,097 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:18,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [245743289] [2021-11-07 01:33:18,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [245743289] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:18,098 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:18,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:33:18,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025743532] [2021-11-07 01:33:18,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:33:18,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:18,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:33:18,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:33:18,099 INFO L87 Difference]: Start difference. First operand 2532 states and 4709 transitions. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:18,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:18,284 INFO L93 Difference]: Finished difference Result 5017 states and 9367 transitions. [2021-11-07 01:33:18,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:33:18,285 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-07 01:33:18,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:18,288 INFO L225 Difference]: With dead ends: 5017 [2021-11-07 01:33:18,288 INFO L226 Difference]: Without dead ends: 2530 [2021-11-07 01:33:18,292 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:33:18,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2530 states. [2021-11-07 01:33:18,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2530 to 2530. [2021-11-07 01:33:18,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2530 states, 2525 states have (on average 1.8625742574257427) internal successors, (4703), 2529 states have internal predecessors, (4703), 0 states have call successors, (0), 0 states 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 01:33:18,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2530 states to 2530 states and 4703 transitions. [2021-11-07 01:33:18,453 INFO L78 Accepts]: Start accepts. Automaton has 2530 states and 4703 transitions. Word has length 77 [2021-11-07 01:33:18,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:18,453 INFO L470 AbstractCegarLoop]: Abstraction has 2530 states and 4703 transitions. [2021-11-07 01:33:18,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:18,454 INFO L276 IsEmpty]: Start isEmpty. Operand 2530 states and 4703 transitions. [2021-11-07 01:33:18,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 01:33:18,456 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:18,456 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 01:33:18,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:18,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:18,671 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 01:33:18,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:18,672 INFO L85 PathProgramCache]: Analyzing trace with hash 638306648, now seen corresponding path program 1 times [2021-11-07 01:33:18,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:18,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1964868246] [2021-11-07 01:33:18,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:18,673 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:18,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:18,674 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:18,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:33:19,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:19,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:33:19,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:19,588 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 01:33:19,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:19,858 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 01:33:19,859 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:19,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1964868246] [2021-11-07 01:33:19,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1964868246] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:19,859 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:19,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 01:33:19,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760459988] [2021-11-07 01:33:19,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:33:19,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:19,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:33:19,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:33:19,861 INFO L87 Difference]: Start difference. First operand 2530 states and 4703 transitions. Second operand has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:21,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:21,594 INFO L93 Difference]: Finished difference Result 9216 states and 17231 transitions. [2021-11-07 01:33:21,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:33:21,595 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-07 01:33:21,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:21,602 INFO L225 Difference]: With dead ends: 9216 [2021-11-07 01:33:21,602 INFO L226 Difference]: Without dead ends: 6737 [2021-11-07 01:33:21,606 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:33:21,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6737 states. [2021-11-07 01:33:21,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6737 to 2530. [2021-11-07 01:33:21,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2530 states, 2525 states have (on average 1.8221782178217822) internal successors, (4601), 2529 states have internal predecessors, (4601), 0 states have call successors, (0), 0 states 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 01:33:21,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2530 states to 2530 states and 4601 transitions. [2021-11-07 01:33:21,809 INFO L78 Accepts]: Start accepts. Automaton has 2530 states and 4601 transitions. Word has length 78 [2021-11-07 01:33:21,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:21,810 INFO L470 AbstractCegarLoop]: Abstraction has 2530 states and 4601 transitions. [2021-11-07 01:33:21,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:21,810 INFO L276 IsEmpty]: Start isEmpty. Operand 2530 states and 4601 transitions. [2021-11-07 01:33:21,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 01:33:21,813 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:21,813 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:21,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:22,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:22,029 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 01:33:22,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:22,029 INFO L85 PathProgramCache]: Analyzing trace with hash 772472772, now seen corresponding path program 1 times [2021-11-07 01:33:22,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:22,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [415503002] [2021-11-07 01:33:22,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:22,031 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:22,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:22,032 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:22,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:33:22,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:22,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:33:22,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:22,955 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 01:33:22,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:23,190 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 01:33:23,190 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:23,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [415503002] [2021-11-07 01:33:23,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [415503002] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:23,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:23,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:33:23,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860341162] [2021-11-07 01:33:23,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:33:23,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:23,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:33:23,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:33:23,192 INFO L87 Difference]: Start difference. First operand 2530 states and 4601 transitions. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:24,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:24,140 INFO L93 Difference]: Finished difference Result 7069 states and 13010 transitions. [2021-11-07 01:33:24,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:33:24,141 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-07 01:33:24,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:24,146 INFO L225 Difference]: With dead ends: 7069 [2021-11-07 01:33:24,146 INFO L226 Difference]: Without dead ends: 4608 [2021-11-07 01:33:24,148 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:33:24,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4608 states. [2021-11-07 01:33:24,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4608 to 2496. [2021-11-07 01:33:24,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2496 states, 2491 states have (on average 1.8221597751906864) internal successors, (4539), 2495 states have internal predecessors, (4539), 0 states have call successors, (0), 0 states 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 01:33:24,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2496 states to 2496 states and 4539 transitions. [2021-11-07 01:33:24,400 INFO L78 Accepts]: Start accepts. Automaton has 2496 states and 4539 transitions. Word has length 86 [2021-11-07 01:33:24,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:24,400 INFO L470 AbstractCegarLoop]: Abstraction has 2496 states and 4539 transitions. [2021-11-07 01:33:24,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:24,401 INFO L276 IsEmpty]: Start isEmpty. Operand 2496 states and 4539 transitions. [2021-11-07 01:33:24,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-07 01:33:24,404 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:24,404 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:24,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:24,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:24,619 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 01:33:24,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:24,619 INFO L85 PathProgramCache]: Analyzing trace with hash -603961180, now seen corresponding path program 1 times [2021-11-07 01:33:24,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:24,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [660134745] [2021-11-07 01:33:24,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:24,620 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:24,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:24,621 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:24,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:33:25,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:25,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:33:25,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:25,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:33:25,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:26,007 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 01:33:26,008 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:26,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [660134745] [2021-11-07 01:33:26,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [660134745] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:26,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:26,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:33:26,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412876380] [2021-11-07 01:33:26,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:33:26,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:26,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:33:26,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:33:26,012 INFO L87 Difference]: Start difference. First operand 2496 states and 4539 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:28,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:28,405 INFO L93 Difference]: Finished difference Result 9830 states and 18049 transitions. [2021-11-07 01:33:28,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:33:28,406 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-11-07 01:33:28,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:28,419 INFO L225 Difference]: With dead ends: 9830 [2021-11-07 01:33:28,419 INFO L226 Difference]: Without dead ends: 7402 [2021-11-07 01:33:28,425 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:33:28,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7402 states. [2021-11-07 01:33:28,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7402 to 2500. [2021-11-07 01:33:28,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2500 states, 2495 states have (on average 1.8208416833667336) internal successors, (4543), 2499 states have internal predecessors, (4543), 0 states have call successors, (0), 0 states 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 01:33:28,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2500 states to 2500 states and 4543 transitions. [2021-11-07 01:33:28,661 INFO L78 Accepts]: Start accepts. Automaton has 2500 states and 4543 transitions. Word has length 88 [2021-11-07 01:33:28,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:28,662 INFO L470 AbstractCegarLoop]: Abstraction has 2500 states and 4543 transitions. [2021-11-07 01:33:28,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:28,662 INFO L276 IsEmpty]: Start isEmpty. Operand 2500 states and 4543 transitions. [2021-11-07 01:33:28,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 01:33:28,666 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:28,667 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:28,702 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-07 01:33:28,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:28,904 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 01:33:28,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:28,905 INFO L85 PathProgramCache]: Analyzing trace with hash -2061004475, now seen corresponding path program 1 times [2021-11-07 01:33:28,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:28,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1843138847] [2021-11-07 01:33:28,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:28,906 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:28,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:28,907 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:28,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:33:29,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:29,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:33:29,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:29,928 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 01:33:29,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:30,169 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 01:33:30,169 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:30,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1843138847] [2021-11-07 01:33:30,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1843138847] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:30,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:30,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:33:30,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445748804] [2021-11-07 01:33:30,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:33:30,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:30,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:33:30,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:33:30,171 INFO L87 Difference]: Start difference. First operand 2500 states and 4543 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:31,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:31,414 INFO L93 Difference]: Finished difference Result 6962 states and 12742 transitions. [2021-11-07 01:33:31,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:33:31,414 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-07 01:33:31,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:31,420 INFO L225 Difference]: With dead ends: 6962 [2021-11-07 01:33:31,420 INFO L226 Difference]: Without dead ends: 4517 [2021-11-07 01:33:31,423 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:33:31,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4517 states. [2021-11-07 01:33:31,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4517 to 3442. [2021-11-07 01:33:31,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3442 states, 3437 states have (on average 1.8082630200756473) internal successors, (6215), 3441 states have internal predecessors, (6215), 0 states have call successors, (0), 0 states 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 01:33:31,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3442 states to 3442 states and 6215 transitions. [2021-11-07 01:33:31,671 INFO L78 Accepts]: Start accepts. Automaton has 3442 states and 6215 transitions. Word has length 89 [2021-11-07 01:33:31,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:31,672 INFO L470 AbstractCegarLoop]: Abstraction has 3442 states and 6215 transitions. [2021-11-07 01:33:31,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:31,672 INFO L276 IsEmpty]: Start isEmpty. Operand 3442 states and 6215 transitions. [2021-11-07 01:33:31,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-07 01:33:31,675 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:31,675 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:31,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:31,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:31,891 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 01:33:31,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:31,891 INFO L85 PathProgramCache]: Analyzing trace with hash -729666801, now seen corresponding path program 1 times [2021-11-07 01:33:31,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:31,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [13622560] [2021-11-07 01:33:31,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:31,893 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:31,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:31,894 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:31,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:33:32,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:32,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:33:32,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:32,951 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 01:33:32,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:33,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:33:33,178 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:33,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [13622560] [2021-11-07 01:33:33,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [13622560] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:33,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:33,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:33:33,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956864801] [2021-11-07 01:33:33,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:33:33,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:33,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:33:33,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:33:33,180 INFO L87 Difference]: Start difference. First operand 3442 states and 6215 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:34,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:34,594 INFO L93 Difference]: Finished difference Result 24628 states and 44859 transitions. [2021-11-07 01:33:34,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:33:34,595 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-07 01:33:34,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:34,617 INFO L225 Difference]: With dead ends: 24628 [2021-11-07 01:33:34,617 INFO L226 Difference]: Without dead ends: 21250 [2021-11-07 01:33:34,621 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:33:34,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21250 states. [2021-11-07 01:33:35,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21250 to 6287. [2021-11-07 01:33:35,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6287 states, 6282 states have (on average 1.8212352753900032) internal successors, (11441), 6286 states have internal predecessors, (11441), 0 states have call successors, (0), 0 states 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 01:33:35,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6287 states to 6287 states and 11441 transitions. [2021-11-07 01:33:35,033 INFO L78 Accepts]: Start accepts. Automaton has 6287 states and 11441 transitions. Word has length 91 [2021-11-07 01:33:35,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:35,033 INFO L470 AbstractCegarLoop]: Abstraction has 6287 states and 11441 transitions. [2021-11-07 01:33:35,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:35,033 INFO L276 IsEmpty]: Start isEmpty. Operand 6287 states and 11441 transitions. [2021-11-07 01:33:35,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-07 01:33:35,035 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:35,035 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:35,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:35,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:35,236 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:33:35,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:35,236 INFO L85 PathProgramCache]: Analyzing trace with hash -454907187, now seen corresponding path program 1 times [2021-11-07 01:33:35,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:35,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [728729855] [2021-11-07 01:33:35,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:35,237 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:35,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:35,237 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:35,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:33:36,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:36,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:33:36,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:36,347 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 01:33:36,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:36,613 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 01:33:36,614 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:36,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [728729855] [2021-11-07 01:33:36,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [728729855] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:36,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:36,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:33:36,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828101535] [2021-11-07 01:33:36,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:33:36,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:36,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:33:36,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:33:36,617 INFO L87 Difference]: Start difference. First operand 6287 states and 11441 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:37,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:37,847 INFO L93 Difference]: Finished difference Result 11356 states and 20600 transitions. [2021-11-07 01:33:37,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:33:37,848 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-07 01:33:37,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:37,859 INFO L225 Difference]: With dead ends: 11356 [2021-11-07 01:33:37,859 INFO L226 Difference]: Without dead ends: 8650 [2021-11-07 01:33:37,862 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:33:37,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8650 states. [2021-11-07 01:33:38,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8650 to 6277. [2021-11-07 01:33:38,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6277 states, 6272 states have (on average 1.820950255102041) internal successors, (11421), 6276 states have internal predecessors, (11421), 0 states have call successors, (0), 0 states 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 01:33:38,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6277 states to 6277 states and 11421 transitions. [2021-11-07 01:33:38,325 INFO L78 Accepts]: Start accepts. Automaton has 6277 states and 11421 transitions. Word has length 91 [2021-11-07 01:33:38,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:38,326 INFO L470 AbstractCegarLoop]: Abstraction has 6277 states and 11421 transitions. [2021-11-07 01:33:38,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:38,326 INFO L276 IsEmpty]: Start isEmpty. Operand 6277 states and 11421 transitions. [2021-11-07 01:33:38,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-07 01:33:38,328 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:38,328 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:38,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:38,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:38,529 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:33:38,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:38,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1636743277, now seen corresponding path program 1 times [2021-11-07 01:33:38,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:38,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1506382027] [2021-11-07 01:33:38,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:38,530 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:38,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:38,531 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:38,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:33:39,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:39,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:33:39,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:39,678 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 01:33:39,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:39,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:33:39,962 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:39,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1506382027] [2021-11-07 01:33:39,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1506382027] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:39,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:39,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:33:39,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377558562] [2021-11-07 01:33:39,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:33:39,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:39,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:33:39,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:33:39,965 INFO L87 Difference]: Start difference. First operand 6277 states and 11421 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:41,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:41,328 INFO L93 Difference]: Finished difference Result 19245 states and 35106 transitions. [2021-11-07 01:33:41,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:33:41,329 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-07 01:33:41,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:41,352 INFO L225 Difference]: With dead ends: 19245 [2021-11-07 01:33:41,352 INFO L226 Difference]: Without dead ends: 16545 [2021-11-07 01:33:41,358 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:33:41,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16545 states. [2021-11-07 01:33:41,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16545 to 8716. [2021-11-07 01:33:41,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8716 states, 8711 states have (on average 1.8158649982780393) internal successors, (15818), 8715 states have internal predecessors, (15818), 0 states have call successors, (0), 0 states 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 01:33:42,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8716 states to 8716 states and 15818 transitions. [2021-11-07 01:33:42,014 INFO L78 Accepts]: Start accepts. Automaton has 8716 states and 15818 transitions. Word has length 93 [2021-11-07 01:33:42,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:42,015 INFO L470 AbstractCegarLoop]: Abstraction has 8716 states and 15818 transitions. [2021-11-07 01:33:42,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:42,015 INFO L276 IsEmpty]: Start isEmpty. Operand 8716 states and 15818 transitions. [2021-11-07 01:33:42,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-07 01:33:42,018 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:42,019 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:42,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:42,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:42,231 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:33:42,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:42,232 INFO L85 PathProgramCache]: Analyzing trace with hash -830657945, now seen corresponding path program 1 times [2021-11-07 01:33:42,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:42,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [272863565] [2021-11-07 01:33:42,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:42,233 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:42,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:42,234 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:42,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:33:43,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:43,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:33:43,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:43,500 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 01:33:43,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:43,830 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 01:33:43,830 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:43,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [272863565] [2021-11-07 01:33:43,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [272863565] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:43,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:43,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:33:43,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643214883] [2021-11-07 01:33:43,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:33:43,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:43,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:33:43,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:33:43,833 INFO L87 Difference]: Start difference. First operand 8716 states and 15818 transitions. Second operand has 6 states, 6 states have (on average 28.166666666666668) internal successors, (169), 5 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:47,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:47,766 INFO L93 Difference]: Finished difference Result 38677 states and 70629 transitions. [2021-11-07 01:33:47,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:33:47,766 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.166666666666668) internal successors, (169), 5 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-07 01:33:47,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:47,806 INFO L225 Difference]: With dead ends: 38677 [2021-11-07 01:33:47,806 INFO L226 Difference]: Without dead ends: 33538 [2021-11-07 01:33:47,813 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:33:47,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33538 states. [2021-11-07 01:33:48,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33538 to 12726. [2021-11-07 01:33:48,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12726 states, 12721 states have (on average 1.823834604197783) internal successors, (23201), 12725 states have internal predecessors, (23201), 0 states have call successors, (0), 0 states 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 01:33:48,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12726 states to 12726 states and 23201 transitions. [2021-11-07 01:33:48,695 INFO L78 Accepts]: Start accepts. Automaton has 12726 states and 23201 transitions. Word has length 95 [2021-11-07 01:33:48,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:48,695 INFO L470 AbstractCegarLoop]: Abstraction has 12726 states and 23201 transitions. [2021-11-07 01:33:48,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.166666666666668) internal successors, (169), 5 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:48,696 INFO L276 IsEmpty]: Start isEmpty. Operand 12726 states and 23201 transitions. [2021-11-07 01:33:48,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-07 01:33:48,700 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:48,700 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:48,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:48,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:48,917 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:33:48,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:48,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1346860968, now seen corresponding path program 1 times [2021-11-07 01:33:48,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:48,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2069191956] [2021-11-07 01:33:48,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:48,918 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:48,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:48,919 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:48,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 01:33:49,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:49,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:33:49,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:50,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:33:50,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:50,345 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 01:33:50,345 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:50,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2069191956] [2021-11-07 01:33:50,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2069191956] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:50,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:50,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:33:50,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121064817] [2021-11-07 01:33:50,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:33:50,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:50,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:33:50,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:33:50,347 INFO L87 Difference]: Start difference. First operand 12726 states and 23201 transitions. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:51,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:51,258 INFO L93 Difference]: Finished difference Result 22007 states and 40010 transitions. [2021-11-07 01:33:51,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:33:51,259 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-11-07 01:33:51,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:51,273 INFO L225 Difference]: With dead ends: 22007 [2021-11-07 01:33:51,273 INFO L226 Difference]: Without dead ends: 12741 [2021-11-07 01:33:51,281 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:33:51,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12741 states. [2021-11-07 01:33:52,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12741 to 12726. [2021-11-07 01:33:52,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12726 states, 12721 states have (on average 1.8151874852605927) internal successors, (23091), 12725 states have internal predecessors, (23091), 0 states have call successors, (0), 0 states 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 01:33:52,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12726 states to 12726 states and 23091 transitions. [2021-11-07 01:33:52,033 INFO L78 Accepts]: Start accepts. Automaton has 12726 states and 23091 transitions. Word has length 102 [2021-11-07 01:33:52,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:52,033 INFO L470 AbstractCegarLoop]: Abstraction has 12726 states and 23091 transitions. [2021-11-07 01:33:52,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:52,034 INFO L276 IsEmpty]: Start isEmpty. Operand 12726 states and 23091 transitions. [2021-11-07 01:33:52,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-07 01:33:52,037 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:52,037 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:52,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:52,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:52,238 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:33:52,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:52,238 INFO L85 PathProgramCache]: Analyzing trace with hash -493659028, now seen corresponding path program 1 times [2021-11-07 01:33:52,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:52,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [91139957] [2021-11-07 01:33:52,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:52,239 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:52,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:52,240 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:52,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 01:33:53,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:53,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:33:53,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:53,571 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 01:33:53,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:53,879 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 01:33:53,879 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:53,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [91139957] [2021-11-07 01:33:53,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [91139957] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:53,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:53,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:33:53,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661756625] [2021-11-07 01:33:53,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:33:53,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:53,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:33:53,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:33:53,883 INFO L87 Difference]: Start difference. First operand 12726 states and 23091 transitions. Second operand has 6 states, 6 states have (on average 31.833333333333332) internal successors, (191), 5 states have internal predecessors, (191), 0 states have call successors, (0), 0 states 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 01:33:56,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:56,731 INFO L93 Difference]: Finished difference Result 33483 states and 60646 transitions. [2021-11-07 01:33:56,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:33:56,732 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 31.833333333333332) internal successors, (191), 5 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-11-07 01:33:56,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:56,763 INFO L225 Difference]: With dead ends: 33483 [2021-11-07 01:33:56,763 INFO L226 Difference]: Without dead ends: 24555 [2021-11-07 01:33:56,776 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:33:56,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24555 states. [2021-11-07 01:33:57,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24555 to 11054. [2021-11-07 01:33:57,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11054 states, 11049 states have (on average 1.8053217485745316) internal successors, (19947), 11053 states have internal predecessors, (19947), 0 states have call successors, (0), 0 states 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 01:33:57,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11054 states to 11054 states and 19947 transitions. [2021-11-07 01:33:57,703 INFO L78 Accepts]: Start accepts. Automaton has 11054 states and 19947 transitions. Word has length 103 [2021-11-07 01:33:57,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:57,703 INFO L470 AbstractCegarLoop]: Abstraction has 11054 states and 19947 transitions. [2021-11-07 01:33:57,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 31.833333333333332) internal successors, (191), 5 states have internal predecessors, (191), 0 states have call successors, (0), 0 states 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 01:33:57,703 INFO L276 IsEmpty]: Start isEmpty. Operand 11054 states and 19947 transitions. [2021-11-07 01:33:57,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-07 01:33:57,706 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:57,706 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:57,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:57,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:57,912 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:33:57,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:57,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1504776278, now seen corresponding path program 1 times [2021-11-07 01:33:57,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:57,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1548788331] [2021-11-07 01:33:57,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:57,914 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:57,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:57,914 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:57,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 01:33:59,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:59,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:33:59,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:59,450 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 01:33:59,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:59,858 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 01:33:59,858 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:59,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1548788331] [2021-11-07 01:33:59,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1548788331] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:59,858 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:59,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 01:33:59,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515213638] [2021-11-07 01:33:59,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:33:59,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:59,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:33:59,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:33:59,860 INFO L87 Difference]: Start difference. First operand 11054 states and 19947 transitions. Second operand has 10 states, 10 states have (on average 19.7) internal successors, (197), 9 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:10,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:10,610 INFO L93 Difference]: Finished difference Result 69242 states and 123906 transitions. [2021-11-07 01:34:10,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-07 01:34:10,613 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 19.7) internal successors, (197), 9 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-11-07 01:34:10,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:10,705 INFO L225 Difference]: With dead ends: 69242 [2021-11-07 01:34:10,705 INFO L226 Difference]: Without dead ends: 59849 [2021-11-07 01:34:10,720 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=285, Invalid=905, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 01:34:10,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59849 states. [2021-11-07 01:34:13,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59849 to 24503. [2021-11-07 01:34:13,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24503 states, 24498 states have (on average 1.8007184259939586) internal successors, (44114), 24502 states have internal predecessors, (44114), 0 states have call successors, (0), 0 states 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 01:34:13,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24503 states to 24503 states and 44114 transitions. [2021-11-07 01:34:13,770 INFO L78 Accepts]: Start accepts. Automaton has 24503 states and 44114 transitions. Word has length 103 [2021-11-07 01:34:13,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:13,770 INFO L470 AbstractCegarLoop]: Abstraction has 24503 states and 44114 transitions. [2021-11-07 01:34:13,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.7) internal successors, (197), 9 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:13,771 INFO L276 IsEmpty]: Start isEmpty. Operand 24503 states and 44114 transitions. [2021-11-07 01:34:13,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-07 01:34:13,774 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:13,774 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:34:13,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:13,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:34:13,995 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:34:13,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:13,996 INFO L85 PathProgramCache]: Analyzing trace with hash 216566463, now seen corresponding path program 1 times [2021-11-07 01:34:13,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:13,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [512428772] [2021-11-07 01:34:13,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:13,997 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:13,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:13,998 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:13,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 01:34:15,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:15,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:34:15,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:15,739 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 01:34:15,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:15,983 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 01:34:15,983 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:15,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [512428772] [2021-11-07 01:34:15,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [512428772] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:15,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:34:15,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:34:15,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677203063] [2021-11-07 01:34:15,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:34:15,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:15,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:34:15,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:34:15,985 INFO L87 Difference]: Start difference. First operand 24503 states and 44114 transitions. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:28,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:28,823 INFO L93 Difference]: Finished difference Result 123741 states and 218354 transitions. [2021-11-07 01:34:28,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:34:28,824 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-11-07 01:34:28,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:29,176 INFO L225 Difference]: With dead ends: 123741 [2021-11-07 01:34:29,176 INFO L226 Difference]: Without dead ends: 103058 [2021-11-07 01:34:29,205 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:34:29,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103058 states. [2021-11-07 01:34:33,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103058 to 30252. [2021-11-07 01:34:33,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30252 states, 30247 states have (on average 1.7430488974113134) internal successors, (52722), 30251 states have internal predecessors, (52722), 0 states have call successors, (0), 0 states 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 01:34:33,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30252 states to 30252 states and 52722 transitions. [2021-11-07 01:34:33,664 INFO L78 Accepts]: Start accepts. Automaton has 30252 states and 52722 transitions. Word has length 104 [2021-11-07 01:34:33,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:33,665 INFO L470 AbstractCegarLoop]: Abstraction has 30252 states and 52722 transitions. [2021-11-07 01:34:33,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:33,665 INFO L276 IsEmpty]: Start isEmpty. Operand 30252 states and 52722 transitions. [2021-11-07 01:34:33,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-07 01:34:33,667 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:33,668 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:34:33,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:33,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:34:33,869 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:34:33,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:33,869 INFO L85 PathProgramCache]: Analyzing trace with hash 640213185, now seen corresponding path program 1 times [2021-11-07 01:34:33,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:33,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1065189313] [2021-11-07 01:34:33,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:33,870 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:33,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:33,871 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:33,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71c4634b-c17c-4537-8612-7f6e6c0b0650/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 01:34:35,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:35,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:34:35,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:35,503 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 01:34:35,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:35,971 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 01:34:35,971 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:35,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1065189313] [2021-11-07 01:34:35,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1065189313] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:35,971 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:34:35,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:34:35,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357367415] [2021-11-07 01:34:35,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:34:35,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:35,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:34:35,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:34:35,973 INFO L87 Difference]: Start difference. First operand 30252 states and 52722 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)